ENGI 220 – ENGENEERING ECONOMY
Introduction
Engineering Economy also commonly referred to as Engineering Economics is one of the
interdisciplinary fields that uses the integration of engineering and economics principles to
provide optimal solutions to real life engineering challenges. Mostly, projects apply this concept
in order to assess the feasibility of a project, occasionally in the event , to compare solutions and
also, comparatively, reflect the financial repercussions of the engineering decision. This gets
ensures that engineers take into consideration the feasibility touching on the technical and
economical aspect of the project both during its planning stage as well as the implementation
phase. Engineering Economy is a very important subject mastering since it act as a blueprint
from where one could decide the right mix of resources, establish the cost of a particular project
as well as identify the right approach in achieving the highest value engineering solutions.
Engineering Economy is a socio technical decision making approach it is practiced in
almost all branches of engineering such as civil engineering, mechanical engineering, electrical
engineering, industrial engineering and many others. Apart from evaluating and implementing
economic strategies these fields use considerable knowledge in their particular specialisations
starting from the construction of infrastructures to lean manufacturing methods. On this
occasion, it is necessary to offer a comprehensive analysis of this vitally important discipline,
referring to its major concept: Engineering Economy, decision making, cost classification,
techniques and further evolution.
Fundamentals of Engineering Economy
Basic Economic Principles Relevant to Engineering
It is very important for engineers to be able to apply the basic economic concepts that will enable
them to determine the efficiency of their actions financially. Key principles include:
Supply and Demand: This principle describes how there occurs the interdependence of
supply, or availability of a certain product, and demand, or the need for that product. In
this consideration, market forces must be taken into perspective so as to determine the
prices and accessibility of the material by engineers.
Opportunity Cost: : A resource that has to be sacrificed in order to get another resource
or utility in the undertaking of a he. Engineers need to weight the value of other projects
or solutions that other have to be left or given up whenever selecting a certain
direction/strategy.
Cost-Benefit Analysis: A technique used in evaluating the efficiency of various
investments and organizing the execution of various assignments or performances. This
analysis enables the engineers to establish which of the options could likely be cheaper.
Time Value of Money
The time value of money (TVM) is a foundational concept in Engineering Economy. It
acknowledges that a dollar today is worth more than a dollar in the future due to its earning
potential. Key techniques to account for TVM include:
i. Present Value (PV): Ancillary of compound interest: A future take used to solve now to
find out at which standard interest rate some amount of money will be worth.
ii. Future Value (FV): It is a concept that represents the amount of money which when
invested at a specified rate of interest with compound interest; return a given sum after a
stated time.
iii. Annuities The money which is receivables at certain time intervals, and which is
reinvested in equal parts within a given time span. Any branch of finance more
particularly that specializing in the engineering field is aware of annuities which exist
within equipments and project lease financings.
For example, when evaluating a project that enables engineers to decide that they spend $1
million today though it will bring $1. $ 2 million within the next five years focusing on the
returns that are expected in the future; the engineers have to determine the present value of flows
to realize the feasibility of the investment.
Cost Analysis and Estimation
i. Evaluating the costs effectively of the certain project is measures how effective the cost
control within that particular project was done hence determining project success.
Engineers must account for various costs, including:Cost factors are role played by
engineers and these include the following;
ii. Direct Costs: Especially there are those assessments that may be assigned only in relation
to some definite project, for instance, the cost of resources, personnel, and machinery.
iii. Indirect Costs: These are sometimes referred to as being overheads when they are not
directly related the business project but rather Fund expenses on the other hand include
expenses that are incurred in the organization to meet different needs in the business
including the administrative expenses.
Contingency Costs:It indicates that cash to be spent in the future is used today; therefore the
next period costs may be beyond the realization of the enterprise or they may lack the money to
meet the costs Emergency incentive It indicates that money meant for the next period, is used in
the current period Base cost forecasts may be derived from the following:
Analogous Estimating: When the break down of cost to the project is done depending on the
estimated price when one is thinking of the advertised price of similar project that had been
carried out before.
Parametric Estimating: Using producing and equations in statistical measuring so that cost can
be approximated by using characterizer project cost.
Bottom-Up Estimating: Therefore, it emerges from the situation when the variety of expenses
is divided into even narrower categories and their amount is summed up to obtain the amount of
project costs.
Cash Flow and Its Importance
Cash flow analysis is a detailed report showing amount of money coming in and going
out of a certain project; that will assist in determining whether a project is financially capable or
not of financing its needs. Engineers need to track:
Inflows: Revenue that originates directly from the sale of some method, gadget, service, or
anything that requires funds to develop or can be borrowed.
Outflows: The total sum of money stated in the specific or current account or which has been
spent on material, labour, equipment etc. or such other expenses actually incurred.
Positive cash flows shows that on flow of more amount in a project than the outflow
whereas negative cash flow may indicate some future problem in regard to cash. This aspect
helps in keeping track of the cash that is available and ensures that the various projects of the
business are financially sound and can meet all the obligations it undertakes.
Economic Decision-Making in Engineering
Decision-Making Process
Even though Engineering Economy as an analysis comes out to be far from the true
picture of how and when rationality is played out in a market, is a theoretical form of rationality
that is known to influence more than one or other phases of decision making to arrive at what
perhaps is considered the best form of decision to make in the field. Here’s an in-depth
explanation of each step in the decision-making process: Here is a listing of all value premises
that would be contributing towards the making of this decision at this level:
1. Identify Alternatives
The first appraisal of the final decision making process is the implication of future chances or
options or prospects in shorter term are called project appraisal. This mask requires the of
thinking hat or literature review method to table a clear list thus providing a clear list of possible
solutions to best tackle the engineering concern prevalent in organisations or engineers.
i. Brainstorming: Recruit one or several of specialized groups of people and several
amateurs willing to be involved in the project. Solicit /Advise on the need to involve as
many a number of people and from as many vistas and therefore ensure as many a
number of solution strategies as possible are availed.
ii. Research: It also consists of the literature review activity which is the action directed on
the search and analysis of scientific sources, case studies, and consultations of industry
reports with the purpose of noting down the solutions and innovations existing in this
sphere. The following strategies may be in the conventional category while the others
may be regarded as innovative technologies:The following actions may perhaps fall
under the conventional strategies while to other people they may fall under the innovation
technologies.
iii. Benchmarking: Another step would be a review of other similar work that can As it
could be helpful to look at what other work has been done in similar projects and what is
expected to be realised. This is particularly ideal when transitioning from one ideal
solution to other ideal solutions and also new solutions.
Consultation: What owners should get involve in are more of matters to do with opinions and
ideas, and this should be derived from other professions, customers, as well as the users. This
could be in the form of completing a survey on their usage of the application, or asking them
through an interview or conducting a focus group discussion to unveil the users’ requirements
and expectations of the application.
2. Define Criteria
After reaching at the aforementioned alternatives the next procedure that becomes
operational is the concrete articulation of the evaluation norms/guidelines that is to be applied on
the selected matters. This is also a flexible and useful way to sort criteria in a broad manner to
see an overall picture of assessment based on economical and technical provisions.
i. Economic Criteria: The following are some of the criterions used in evaluating
investment projects; cost, feasibility or rate of return expected, net profit, NPV, IRR, PBP
and the total cost of ownership. Intensive factors consist of those costs allocated in the
initial stage of the system while in the implementation, it is accompanied with the
implementation incremental cost to be experienced in future.
ii. Technical Criteria: Issues such as; the speed at which the data flows, ease of accessing
the data, ability to expand the data format, and appropriateness of the framework to other
existing working structures as well as the standard industrial conventions. Another type
of perspective is the IT technical possibility that puts the question in context by
answering as to whether the chosen approach is doable, as well as to whether is best
implementable easily when being provided.
iii. Qualitative Criteria: Some of the factors, which are being considered, are as follow,
firstly how much these variables are impacted by environmental processes, secondly the
level of acceptance that they have received among people within the society and thirdly
how much they align themselves within the scope and framework of organizational goals
or strategies.
iv. Risk Factors: Explain why each of the options is favourable and its influences effective
specifically in relation to threats and opportunities technical and economical risks and
threats external risks and threats including regulatory issues and market volatilities.
The items provided under the ‘Maintenance and Support’ will need to be described to
show what they entail and how they are best sequenced in a way that makes them more useful in
helping to achieve the defined project goals
3. Evaluate Alternatives
Economic analysis is another name for the task analysis and is a process of comparison of
the needed options and further definition of feasibility of the certain option under the given
criteria. Data should collected and analyzed before the solutions they select can be made, in
order to make a suitable choice.
i. Cost-Benefit Analysis (CBA): Explain big picture economics of each of them or
compare essential strengths of each one with certain weaknesses of other options. Such
are estimating an overall project cost by totalling up net costs and benefits, as well as
other other measures such as NPV and BCR.
ii. Life Cycle Cost Analysis (LCCA): Assess the work in terms of the cost aspect of the
project throughout its life cycle as a concept since it will involve the initial costs of the
project, cost of operating and maintaining the project, and the costs involved in the
disposal of the project. It allows one to predict what potential consequences a specific
activity will cause in the long-term financial position of an organization.
iii. Multi-Criteria Decision Analysis (MCDA): In this case whose alternatives are to be
valued, techniques and for example the weighted scoring models may be used to enable
comparisons between the different measures. Assign each criterion a specific value based
on how closely it affects the decision; next, rate each option in light of each criterion in
the same list.
iv. Sensitivity Analysis: Identify the consequences, which depend on alterations in assumed
values – for example, COGS, interest rates. It also assists in knowing the stability of the
options in varying contexts, which is considered important in the decision-making
process.
v. Simulation Modeling: One should scenario analysis, that involves using models that are
computer generated to analyse the efficiency of one or the other course of action under
various situations.
4. Make a Decision
The next activity that is undertaken following the evaluation process is to make a
decision in favour of the preferred option. The decision made out of the analysis should therefore
be followed by the reasons in as regard to the intent.
i. Decision Matrix: Thus, the matrices are formulated with the weights and the scores
obtained from the MCDA used in. This provides a pictorial view where each of the
alternatives for comparison is displayed against each of the established criteria/metrics.
ii. Stakeholder Input: Recommendations should also be made in relation to the kinds of
inputs to be obtained from Project Sponsors, Clients and End-users. Another approach
towards gaining support also requires the taking of the qualitative aspect that involves the
views, suggestions and choices of the stakeholders.
iii. Scenario Analysis: Based on this hypothesis, the observer should study several cases
that may likely exhibit all the possible outcomes of the given chosen course of action. : It
only requires imagining of the best or the best option possible as well as the worst or the
worst option possible, besides the expectation or the most likely outcome.
iv. Consensus Building: Permit casual conversations on lower ranks and make the decision
that settles the ranks determine by the consensus agreed by the other members of the
decision making authority. In this manner, the management is will in a position to look
for ways whereby the change meant in order to make the recommended choice a
favorable one; will be effected hence making change acceptable by all the stakeholders.
5. Implement the Decision
Considering the examined options and after determining which of them can be effective
in combating procrastination, we can now proceed to the subsequent stage, which is the action
stage on the identified solution. This makes it important to ensure that there is proper planning,
the right execution, follower and supervision most especially to ensure that the intended
objective is realized to the fullest.
i. Project Planning: This should be formulated by developing a facetime project plan that
includes details on the activities that have to be done, which subgroup they fall under,
time required on each, how it can be accomplished and necessary resources for achieving
the project. This is so because when actually preparing the project schedules, budgets and
risk management, so many factors are required to be considered.
ii. Resource Allocation: Guarantee, protect and estimate from people, tangible and other
resources necessary for the work plan implementation. It is also important to also check
and confirm if the team in place that is to carry out the implementation activities is
competent enough to do so appropriately.
iii. Execution: Implement it as provided in the plan and elaborating and defending
aspirations of quality and practice. They include things like tendering, where contracts
are provided and having a timetable, where activities and check-ups are arranged to
ensure the appropriate work is done.
iv. Change Management: Avoid the deviation from the set plan as much as possible to
make sure that the proposal fulfillment is in the right path. This may entail providing an
account to the newly observed and unforeseen issues, as well as adjusting the laid plans
to suit new environments or situations and notifying the other partners and parties.
6. Monitor and Review
The last activities include the management and the assessment of the project based on the
comparison of actual outcomes to those set as a benchmark in the on-going manner to ensure that
the goals set in the undertaking are achieved and the worthy gains are delivered.
i. Performance Monitoring: While evaluating the projects, measure certain factors in the
project to get easy way to determine and compare the efficiency and status of the project.
This entails the movement of the focus towards the event with respect to cost control, the
time and quality of production as well as risk estimates that have to be controlled.
ii. Regular Reviews: Daily, weekly, monthly or any time as demanded by the schedule of
the project and the speed/direction of the project should have a review meeting to check
whether the current pace/trend is problematics or may cause alteration in the original
plan. These include appointments by other managers involved with the project, reports on
progress and assessments of efficiency and effectiveness of the functioning project.
iii. Feedback Mechanisms: Design the institution or the receptors of the feedback that the
target population is likely to give: the project team, the client and the consumer. This is
also important work with a view to future challenges that have to be faced and also with
the development of further strategies for work in future.
iv. Post-Implementation Review: Lastly, it also calls for the use of a debriefing method,
though not on whether the project was a success or not to assess the extent of the results
attained. This means having the opportunity to determine if an objective of the project
was met, consider the potential strengths and restricted limitations of the project, and
codify factors for use in future projects.
v. Continuous Improvement: Consequently, in furthering studies upon the given process,
some other useful suggestions and amendments should be needful and prepared based on
the learned lessons in the above mentioned future projects. This leads to the improvement
of the positive organizational culture; learning organization that focuses on building on
its strengths as well as seeking to areas which require change.
Criteria for Economic Decisions
Engineers use various criteria to evaluate the economic viability of projects, including:As
per these theoretical frameworks and the literature review presented above, engineers will
employ different measures of assessment for determining the economic feasibility of the
projects, for instance,
Net Present Value (NPV): NPV was originally designed for determining potential of an
investment stream to gross cash profits using the same formulation as the one that created
for the calculating difference between the present worth of future cash flows and
investment costs. Based on the figure returned, in the event that the figure returned is
greater than zero, this is an indication that one will be in a position of making more
money from value of different streams one is into for that specific project compared to
overhead costs.
Internal Rate of Return (IRR): It stands for indicated rate of return and it is utilized
where a number of course present worthes are to be equated to zero in the situation of
existing present worth. This raises up the notion that the signs apply in that it is the
expected return, or one could also refer to it as future return which is expected of the
project. Accepting Investments The IRR acceptable principle postulates that only those
investments which are capable of producing a return rate higher than the cost of capital
should be accepted.
Payback Period: This metric focuses on earliest point at which the venture is expect to
be in a position to get a return on the cost of the project. It has some remarkable flaws
which are It takes no account of either the time value of money or the future value
beyond the payback period.
For example, when an engineer is comparing between two projects, he or she might see that
while Project A gives a net present value $500 000 and an internal rate of return 15 per cent,
Project B which yields NPV of $300 000 and an IRR of 20 per cent. Therefore, and endearing to
cost of capital for an organization and absolute investment requirements, an organization may
opt for Project A based on the fact that although, Project B has a relatively higher IRR, its NPV
is more noble.
Risk and Uncertainty in Economic Decision-Making
From the engineers, it is clear that in most of the projects there is usually a risk or risk
factor that ought to be considered while doing the Engineering Economics practical to determine
whether on every tendering of a definite project one is in for a gain, or one is asked a question or
even one makes a loss. Engineers must identify and assess these risks using techniques such
as:The engineers have to realize that the next risks are not the same and one can assess them by
using options like:
• Sensitivity Analysis: As to how the hypothetical changes might impact on the probability of
success in a project undertaking, particularly with to assumption factors such as the price of the
inputs used in the undertaking of the project, the rate of interest, amongst other factors.
• Scenario Planning: factor if one is chosen then the different which may be present in the
chosen region that is best case scenario worst case scenario expected case scenario contingency
case scenario and so on can be considered together.
• Monte Carlo Simulation: In this context, the calculation of the probabilities and of the
likelihood of matching risk and uncertainty provides the quantitative characteristics that
determine the prospects of the projects being compared.
This is because through analysing risks it means that the engineers are in a position to be
in a better disposed to make better decisions in as much as they are engaged in economic
decisions making processes in order to avoid realisation of those risks could lead to some or all
of the following:In other words if risk analysis means that the engineers are in better position to
make better decisions in as much as they are involved in economic decision for the purpose of
avoiding the realization of the risks may result in some or all of the risks listed as follows:
Cost Concepts and Classifications
Types of Costs
Understanding different types of costs is essential for effective project management and
economic analysis:Therefore, it is possible to point that there exist several types of costs which
would have to be considered during the project management and, thus, the economical analysis:
• Fixed Costs: These included costs such as rent, wages, power and light, insurance and
depreciation, and all other expenses except those that change with the level of production or is
dependent on the number of persons served. These are costs that can be incurred at a certain
instance and they do not fluctuate with the level of the projects’ production even though they are
project costs.
•Variable Costs: There are constraints such as the fixed costs which are steady independent of
the level of output while variable costs depends on the amount of output one intends to produce
some of which include the raw materials or energy needed in the production floor. Like any other
cost, these are variable and can vary depending on the performance level that any firm aims at.
•Marginal Costs: Cost that is incurred per dollar of sales or revenue; the amount of funds
devoted to covering costs in order to generate a dollar of sales. They can also be useful in
determining the productive level through the use MC analysis.
•Sunk Costs: They are also called siezure costs they refer to the expenditure which had taken
place or incurred and cannot be reclaimed, middle births costs. I deemed it proper to ensure that I
keep on reminding this analysis part, that these costs should not in any way dictate the current
decisions made.
Cost Classification and Allocation
The strategic managerial decision that they need to make in this case is that how costs
should be charged appropriately and distributed in a right manner so that they can apply all the
required budgets as well as regulate costs correctly. Engineers typically classify costs into:The
basic piece of information that any engineer uses to categorise costs into is as follows:
•Direct Costs: Costs that can be clearly assigned to an activity, project, or stratum (for example,
the direct material cost and direct wages cost).
•Indirect Costs: Consist of:a. Cost that is incurred directly in executing specific project
activities. b. Overhead costs which are expenses that are incurred while performing project
activities and may happen in numerous other projects and processes.
It means that if you are in any position to allocate overhead costs to the number of activities or
departments it is still possible to locating the most appropriate cost driver where you could apply
labor hours, machine hours and the rest.
Break-Even Analysis
Applying the break-even analysis, it is possible to start to see the point that money earned
is proportional to money spent with many consequences that would suggest either no chance of
insuring a profit or a loss of that much as well. They will assist engineers to determine the
minimum requirements in performance that are needed if an organization is to be able to break-
even or even reduce and in some cases, fully eradicate, losses. The break-even point (BEP) can
be calculated using the formula:Other formulas include the following The BEP is calculated with
this formula: BEP = Fixed cost / (Selling price per unit – Variable cost per unit)
BEP=FixedDCostsPriceDperDUnit−VariableDCostDperDUnit\text{BEP} = \frac{\text{Fixed Costs}}
{\text{Price per Unit} - \text{Variable Cost per
Unit}}BEP=PriceDperDUnit−VariableDCostDperDUnitFixedDCosts
For example, if a project has fixed costs of $100,000, a price per unit of $50, and variable costs
per unit of $30, the break-even point is:
BEP=100,00050−30=5,000Dunits\text{BEP} = \frac{100,000}{50 - 30} = 5,000 \
text{ units}BEP=50−30100,000=5,000Dunits
A break-even scenario for this project and these guidelines necessarily implies that the project
must generate and sell at least 5,000 units.
Investment Analysis Techniques
Present Worth Analysis
It helps the decision maker in arriving at the decision as to which project on net profitable
that is on cash point basis in any particular project. When it comes to comparing projects, the
option providing for unequal project length and characteristics in terms of cash flow can be
preferable. Whereby, in an evaluation of a project in an economic sense, PW is determined from
future cash flows by an action of using a certain rate of discount.
For example, consider a project with the following cash flows and a discount rate of 10%:For
instance, let me factor the following data: cash flows for a project $100000, -$ 40000, $60000, $
40000, and $ 20000; discount rate, 10%.
Initial Investment: $100,000
Year 1 Cash Flow: $40,000
Year 2 Cash Flow: $50,000
Year 3 Cash Flow: $60,000
The PW is calculated as follows:
PW=−100,000+40,000(1+0.10)1+50,000(1+0.10)2+60,000(1+0.10)3\text{PW} = -100,000 + \
frac{40,000}{(1 + 0.10)^1} + \frac{50,000}{(1 + 0.10)^2} + \frac{60,000}{(1 +
0.10)^3}PW=−100,000+(1+0.10)140,000+(1+0.10)250,000+(1+0.10)360,000
PW=−100,000+36,364+41,322+45,081\text{PW} = -100,000 + 36,364 + 41,322 +
45,081PW=−100,000+36,364+41,322+45,081 PW=22,767\text{PW} = 22,767PW=22,767
A positive PW means that the organisation can generate a net cash inflow in excess of the cost of
the project.
Annual Worth Analysis
AW or the Annual Worth Technique is used for ascertaining the value of all projects
yearly so which can business level which can simplify different projects for easy comparison.
These are the cash flows since the commencement of the concept up to the terminal date Every
cash flow of different units or of flowing at different time intervals is converted into an
equivalent annual figure by a process known as customary annuity factor and is mathematically
expressed as PW of cash flows.
For instance, using the same cash flows from the PW example and a discount rate of 10%, the
AW can be calculated as follows:For example let us use the same PW of $433,587, same cash
flows and same discount rate of 10%, then the AW can be calculated as following: Therefore, the
AW calculated as $810,327.Calculate the PW: $22,767
1. Convert PW to AW using the annuity factor:
AW=PW×i(1+i)n(1+i)n−1\text{AW} = \text{PW} \times \frac{i(1 + i)^n}{(1 + i)^n -
1}AW=PW×(1+i)n−1i(1+i)n
Where iii is the discount rate and nnn is the number of periods.
AW=22,767×0.10(1+0.10)3(1+0.10)3−1\text{AW} = 22,767 \times \frac{0.10(1 + 0.10)^3}{(1
+ 0.10)^3 - 1}AW=22,767×(1+0.10)3−10.10(1+0.10)3 AW=22,767×0.4021\text{AW} = 22,767
\times 0.4021AW=22,767×0.4021 AW=9,152\text{AW} = 9,152AW=9,152
This amount is $9,152 – AW stands for Annual Worth, which shows the value of the cash flow
of the project annually.
Future Worth Analysis
In the contest of future worth analysis which offers value of all the cash flows at
sometime in the future the working capital management is defined as the management and
handling of the net working capital for a given corporation. This method enables the engineers
who estimate the cost likely to be incurred from now till the impacts of the project in the future
and then place a value on them in the current price. Specifically, the number of periods of
present and/or future cash determines the FW through a formula of compounding periods.
Using the same cash flows from the PW example and a discount rate of 10%, the FW can
be calculated as follows:Thus, given the same cash flows from the same PW examples and using
a discount rate of $0. 10, the FW is:
FW=−100,000(1+0.10)3+40,000(1+0.10)2+50,000(1+0.10)1+60,000(1+0.10)0\text{FW} = -
100,000(1 + 0.10)^3 + 40,000(1 + 0.10)^2 + 50,000(1 + 0.10)^1 + 60,000(1 +
0.10)^0FW=−100,000(1+0.10)3+40,000(1+0.10)2+50,000(1+0.10)1+60,000(1+0.10)0
FW=−100,000×1.331+40,000×1.21+50,000×1.10+60,000\text{FW} = -100,000 \times 1.331 +
40,000 \times 1.21 + 50,000 \times 1.10 +
60,000FW=−100,000×1.331+40,000×1.21+50,000×1.10+60,000
FW=−133,100+48,400+55,000+60,000\text{FW} = -133,100 + 48,400 + 55,000 +
60,000FW=−133,100+48,400+55,000+60,000 FW=30,300\text{FW} = 30,300FW=30,300
An FW > 0 means that the value of the project will increase in the future and bring added values
in the future.
Benefit-Cost Ratio
The uk benefit cost ratio analysis is a ratio that targets to achieve an equal comparison
between the benefits of a given project and the cost that the project comes with. This is
commonly quantified in a ratio form of present value of benefits divided by present value of cost.
The benchmark for evaluating the BCR is established at one; thus, any benefit cost ratio
exceeding this value evidences the ability of the proposal in question to generate more public
benefits than costs and, therefore, can be considered financially profitable.
For example, if a project has a present value of benefits (PVB) of $150,000 and a present value
of costs (PVC) of $100,000, the BCR is:For example, let the concern of the project be with a
qualifying PVB of $150,000 and PVC $100,000, then the BCR will be:
BCR=PVBPVC=150,000100,000=1.5\text{BCR} = \frac{\text{PVB}}{\text{PVC}} = \
frac{150,000}{100,000} = 1.5BCR=PVCPVB=100,000150,000=1.5
This can be explained as a basic cost recovery of 1. 5 where it means that for each dollar
that is being spent, the particular project is likely to create $1. 50 in benefits.
Comparing Multiple Alternatives
At the moment, managers and engineers work in a situation that can be described as
follows: they encounter project choices. Cooper and Kaplan have found that by applying the
concept of NPV, IRR and BCR, they can easily appraise the above-mentioned alternatives and
come to the correct conclusion about cost. For example, consider two projects with the following
details:For example: discuss the following of projects A and B; project details.
•Project A: Based on these computations, it is recommended that the investment should be made
with the following the value indicators: NPV $100,000; internal rate of return 12%; benefit-cost
ratio 1. 8.
•Project B: Based on the above calculated factors, the following actions should be taken after
the investment on the project:
The IRR = 0. 15 while the NPV = 80000 After the investment has been made on the project the
following movements should be made: The BCR = 15
We have to compare NPV and BCR results as it reveals that project A has a great over-all
value than project B high risk, but on the other end of the spectrum, project B seemed to have the
highest probability in getting better percentage returns as pointed out in the IRR. For instance,
the organisation may wish to differentiate between between Project A and B but while evaluating
which project to undertake out of the two, then the evaluative criteria could well be value rather
than rate of return.Depreciation and Its Impact on Engineering Economy
Types of Depreciation Methods
Depreciation is an essential process that takes place within an organization by aging the
asset owned in this case the aging of assets in the organization. Common methods include:
•Straight-Line Depreciation: Splits the total depreciation into equal parts over the
useful economic life of an asset, they are also referred to as annual depreciation. One does not
need to put too much effort in effectively computing it; and because of this, people like it
because it is straightforward and simple.
For example, an asset costing $100,000 with a useful life of 10 years and no salvage value would
have an annual depreciation expense of:For instance, an asset acquired for $100,000, which is
expected to benefitted for 10 years and will have no residual value at the end of he useful life,
will post depreciation expense of?.
AnnualDDepreciation=CostUsefulDLife=100,00010=10,000\text{Annual Depreciation} = \frac{\
text{Cost}}{\text{Useful Life}} = \frac{100,000}{10} =
10,000AnnualDDepreciation=UsefulDLifeCost=10100,000=10,000
Declining Balance Depreciation: This occurs once the book value of those assets goes through
the depreciation process where it is facilitated by a specific percentage rate of depreciation. It
also come out with high utility to charges early year of depreciable assets and low charges in
succeeding years of its operation.
For instance, using a double declining balance method with a depreciation rate of 20% for the
same $100,000 asset:For example, the same asset could be cost $100,000 and it will be
depreciated with double-declining balance method at 20% depreciation rate.
Year 1: Depreciation=100,000×0.20=20,000\text{Depreciation} = 100,000 \times 0.20 =
20,000Depreciation=100,000×0.20=20,000
Year 2: Depreciation=(100,000−20,000)×0.20=16,000\text{Depreciation} = (100,000 - 20,000) \
times 0.20 = 16,000Depreciation=(100,000−20,000)×0.20=16,000
Sum-of-the-Years-Digits (SYD): Accelerates depreciation by multiplying the depreciable
amount by a fraction that decreases each year. The sum of the digits for a 10-year useful life is
55 (1+2+3+...+10).
For example, in the first year: Depreciation=1055×100,000=18,182\text{Depreciation} = \
frac{10}{55} \times 100,000 = 18,182Depreciation=5510×100,000=18,182
Tax Implications
Depreciation influences taxable income since depreciation expense allows a taxpayer to
less revenues that they need to pay taxes on. It is therefore important for engineers to be
acquainted with the different depreciation schedule and its tax consequences in order to make the
best choices for total costs . For example, to increase the magnitude and frequency of deductions,
companies use various accelerated depreciation lives such as double declining balance.
Impact on Project Evaluation
Depreciation affects working cash flows and Projected Profit and Loss account through
changes in rate of returned cash flows and Net income respectively. Proper depreciation is used
when engineers are projecting and estimating the accurate project costs depending on time and
allows in understanding the future cost implications. For instance, selecting an accelerated
depreciation approach can enhance a project’s financial performance on paper during the initial
years of the project while increasing the outstanding depreciation expenses in the future years
and thus reducing the overall income.
Inflation and Price Change
Understanding Inflation and Its Measurement
Inflation is the rate at which the general level of prices for goods and services rises,
eroding purchasing power. Engineers must consider inflation when planning long-term projects
to ensure that cost estimates remain accurate over time. Inflation is typically measured using
indices such as the Consumer Price Index (CPI) or the Producer Price Index (PPI).
Effects of Inflation on Engineering Projects
Inflation impacts project costs, revenue projections, and financing requirements. Ignoring
inflation can lead to underestimated costs and overestimated returns. For instance, if a project has
a 5-year horizon and inflation is expected to average 3% per year, the real cost of materials,
labor, and other expenses will increase, affecting the project's overall budget and financial
viability.
Adjusting Economic Evaluations for Inflation
To keep track of their dollar cost, engineers apply the principles of real and nominal
interest rates on economic evaluations. Real rates of interest differ from nominal ones in that
they do not include consideration of the inflation rate, whilst nominal rates do. Inflation
eliminates or reaches for better results when analyzing the effectiveness of a certain project.
For example, if the nominal interest rate is 8% and the inflation rate is 3%, the real
interest rate can be calculated using the Fisher equation:
1+NominalDRate=(1+RealDRate)(1+InflationDRate)1 + \text{Nominal Rate} = (1 + \text{Real
Rate})(1 + \text{Inflation Rate})1+NominalDRate=(1+RealDRate)(1+InflationDRate)
1+0.08=(1+RealDRate)(1+0.03)1 + 0.08 = (1 + \text{Real Rate})(1 + 0.03)1+0.08=(1+RealDRate)
(1+0.03) RealDRate=1.081.03−1=0.0485≈4.85%\text{Real Rate} = \frac{1.08}{1.03} - 1 =
0.0485 \approx 4.85\%RealDRate=1.031.08−1=0.0485≈4.85%
Using the real interest rate in economic evaluations ensures that inflation is appropriately
accounted for in project planning and budgeting.
Project Financing and Budgeting
Sources of Financing for Engineering Projects
Engineering projects can be financed through various sources, including:The following
are some of the ways through which access to finance for engineering projects may be accessed
as deailted below.
•Equity Financing: They also mean direct intervention by company management in sale of
stakes in an organization with an aim of using the proceeds from sales of securities to finance
projects by the firm. This is however different from many other financing techniques since the
owner is not assumed to pay back the required amount of money that has been financed based on
the financial securities available but he/she often surrenders part ownership of the business.
•Debt Financing: Credits that can be described as money given by a financial firm in with the
understanding that the borrower will be expected to bring back and more than they received from
the lender known as interest. Some of these methods are: Bank loans refer to financial assistance
offered to individuals, companies or any group in need of funds to finance their project, bonds
are financial securities and mortgages relate to house or property loans. In the olden days,
another advantage with the debts financing was that organizations were able to code the interest
payable.
•Grants and Subsidies: This is a type of fund provided for the implementation of a project and
for which no payments are expected to be made afterward this fund maybe from a government or
from a certain organization. These fingerings are mainly provided to allow for invitation of
elements relating to efficiency, technology and environment in addition to structures.
Each financing source has its advantages and disadvantages. Equity financing provides
permanent capital but dilutes ownership, while debt financing requires repayment but retains full
ownership.
Financial Planning and Control
From the M & E of all the presented projects, one can deduce that all projects in terms of
financial planning and implementation are well forecasted and in general out rightly do not have
plans of surpassing the set financial objectives. This involves:
•Setting Financial Objectives: Serving as the working model for the entire period of the project,
the blue-print incorporate tangible and quantifiable objectives in terms of the cost of the project,
the size of returns and the turnovers.
•Preparing Budgets: It is advised that you should prepare some particular budgets and it should
contain the spendings and earnings that is likely to be fraud as the process of the business.
•Monitoring Performance: Regular examination, check, and monitoring of accounts regarding
disbursed expenses and receipt of receipts for/members of the budget, comparing, and adjusting
differences, if any.
Financial report, budget and variance all encompass financial aspects and by means of
them the engineers can determine project position and also, cost control so that it will not go
beyond certain line.
Budget Preparation and Management
Budgeting plays a peculiar feature in achievement of the projects and the initial task of
preparing budgets and managing a budget is undeniably very vital for achieving the projects and
every project of enhanced performance in the better way. Engineers must:
•Estimate Costs Accurately: The following are methods widely used under safe and precise
attempt in order to identify cost possibilities in a particular project.
•Allocate Resources Efficiently: Hence, the term leverage can be described as an attempt of
how a project will be able to become more effective given that more resources it avail.
•Monitor Expenses: Budgets: Compare the acceptable budget to different activities to
determine to what extent the actual budget should have been incurred, and so as to identify any
abnormal mean difference that will result to ideal change.
All in all, controlling the budget entails the overseeing of the costs and application of cost
estimate tools in order to enable the effective and efficient financial management of projects to
achieve set goals.
Applications of Engineering Economy
The Following are case studies of engineering projects:Here are below engineering
project case studies for your reference:
In conclusion, referring to the analysis made above, here is the conclusion for this
particular assignment: with reference to the case studies used, this helped give the student a good
insight of the key principles of Engineering Economy. Examples include:
•Infrastructure Development: By assessing the mentioned hypothetical case against the criteria
of the cost, which is the actual cost of a new highway or bridge to be incurred for financing
construction and maintenance expenses?For this, they would like to know if yes, what traffic
fund they expect on outlaying construction and maintenance expenses.
•Renewable Energy Projects: Making the best out of the chances of attaining break even on the
putting up of the distributed renewable power such as the solar or wind power after having taken
the cost of installation as well as other costs for operating the power after establishment of the
power together with any other possible subsidies from the government.
•Manufacturing Plant Expansion: When discussing about Capital expenses, Prime arguments
backed with production capacity addition, higher Core expense, better productive expenses
probability and resultant probable revenues.
Optimization Techniques in Engineering Projects
Optimization is also definitions techniques that help one tackle the best result in light of
constraints and further refining in its best possible way. Common techniques include:
•Linear Programming: It will be prudent here to define this as a scalar mathematical concept
that is widely used in determining the most effective techniques for organisational utilisation of
people and material resources. For instance, linear programming will allow the engineers to
optimize how they can blend the various production levels attained since it has been found that
the chosen manufacturing levels will yield a specific level of profit within the range of the
production capabilities achieved.
•Simulation Modeling: There is however one available method through which organizations
and scholars can endeavor to evaluate a plethora of different economic consequences of the
concerning condition: constructing the subject under study after or in a computer, and then trying
out different test runs. For example, while using the modeling strategy, an engineer will be in a
position to see the impact that a new traffic control plan will have on the upcoming construction
endeavor on a given road.
Sustainability and Economic Considerations
Incompilation with the above-stated objective, recent development organizes
sustainability as one of the most significant measures that needs to be key consideration in
establishing the sustainability of different engineering project and the average time that would
take to complete such a project. Engineers are also required to respectively assure that the fiscal
effect of the projects would be favorable and would remain to do so in the future with regard to
ecology and community. Sustainable engineering practices involve:
• Life Cycle Cost Analysis (LCCA): Costing: This activity known as costing in a project that
covers mobilization of the total cost in putting in place the project, the cost incurred in acquiring
the necessary materials and resources for the realization of the project goals, the cost of using the
acquired resources in the achievement of the project goals as well as the cost of demobilizing the
project at the end.
• Environmental Impact Assessment (EIA): Identifying and evaluating the effects and
vulnerabilities of the environment in a particular project and the appropriate measures to take in
the event of occurrence of the potential adverse effects of the details project on the parameters of
the environment.
Thus, analyzing with the data I have gained out of this consultation, sustainability of economic
appraisal signifies that engineers develop sustainable projects in the economic-, social- and
environmental bearings.
Future Trends in Engineering Economy
Advancements in Technology and Their Impact
This is due to the fact that Engineering Economy is also influenced by the impact of certain
technologies that are conspicuous today. The use of these new forms of knowledge such as
Artificial Intelligence, Big data and even the block chain has enhanced the efficacy and accuracy
of these highly expensive economic analyses.
• AI and Machine Learning: These technologies can accept large volumes of data via feeds and
then sort them out in order to identify patterns or even make conclusions that can facilitate
improving the evaluation of costs, rating of risks and decision on any issue.
• Big Data Analytics: Ostensibly, the latter primarily offers advantages of providing a more
expanded examination of market information, customers, and projects to make more sound
economical estimates.
• Blockchain: It also attests to the fact that this technology provides a more efficient way of
performing financial transactions and contract signatures, normally in the sphere of project
financing, with a view to reducing the rate of fraud, and thereby enhancing the level of
confidence in the project.
Globalization and Its Effects on Engineering Economy
Globalization presents various challenges and opportunities for Engineering Economy by
enhancing rivalry within fields and supplying new grounds for global partnership. Two common
considerations that engineers have to take in to consideration include; As a result of globalization
engineers have to consider the global market system, supply chain and regulating systems when
assessing them.
• Global Supply Chains: This comes at the risk of disruption of supplies due to such factors as
political instabilities this aspect needs to be balanced with the gains got from outsourcing.
• Cross-Border Projects: To identify and recover costs related with international projects, one
has to account for such factors as exchange rates, tariffs that are inherent in globalization that
may increase costs and time required for the project.
Sustainable Development Goals (SDGs) and Engineering Economy
These are United Nation’s Sustainable Development Goals whose brief descriptions may
be of use when developing rough hypotheses for more mainstream sustainability implementation
within engineering projects. Hence, current days SDGs are aimed at offering some econometric
fit to the engineers, as well as to find out whether some projects are going to be useful or not for
SD.
In fact, it started with its typical opening line ‘calling for a new industrial revolution’ where
sustainable development is the top priority.
• Affordable and Clean Energy (SDG 7): Business engineers could then follow up and make
evaluations of renewable potentiality project revenues and the ability to curtail carbon emissions.
• Industry, Innovation, and Infrastructure (SDG 9): Thus making its economic effect dear
based on the expense process erroneous towards central and industrial buoyancy.
• Responsible Consumption and Production (SDG 12): But now it is time for points of critical
analysis: there are times that vain assumptions of sustainable production and the waste
management measures look rather frivolous – one has to calculate its cost and efficiency.
That is, as the set objectives increase in the profit-model framework of the engineering
projects, the engineers strive to achieve other objectives within the societal impacts of the global
achievement of the SDGs.
Conclusion
Engineering Economy is an important component of engineering that major on
economics as a key facet that should be considered before implementing a project to prevent the
development of an economically unworkable project. It is thus wise that engineers gain
knowledge and expertise in the basic financial principles of the time value of money, costing and
investment appraisal and assessment of risk since the decision making will regiatan a direct
influence on amount of money to be spent, how to spend it, how to source the money among
other monetary considerations.
In future, the subject of Engineering Economy will remain relevant since global
development trends foster more innovative in and focus on sustainable solutions. As it was
identified that engineers need to be familiar with new tools and methods in order to resolve
emerging multifaceted problems in engineering design. In this way, they can actively contribute
towards evolving new, sustainable concepts, ideas and strategies aimed at meeting current
difficulties and leveraging tomorrow’s prospects.
