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A WAREHOUSE PLANNING/DESIGN PROJECT
Logistics design Project
Due Date: This project is due .... (TBD)
The Kepko Manufacturing Company is planning to build a modern (small)
warehouse in North Jackson, Ohio. Recent long-term sales agreement with 3 large
companies in the North East Ohio Area has prompted the company to build and
operate such a warehouse to ensure that the company will be able to make prompt
and on-time deliveries to the three customers. The warehouse will be used to store
the following 8 items. (see table 1)
Table 1
Item➔ A B C D E F G H I J
Received per day 480 920 730 440 500 670 1050 1240 2800 2500
L 20 20 45 ,42 42 42 45 45 20 20
Box (inch)*. W 15 15 24 20 20 20 24 24 15 15
H 12 12 16 32 32 32 16 16 12 12
Weight (lbs.). 0.85 1.12 1.95 2.28 1.72 3.20 3.35 2.90 0.55 0.42
Days in Inventory 1-2 1-3 2-4 3-4 1-3 2-3 1-3 2-4 2-4 3-4
Product Shape ➔ R**. R R R C**. R. R . C R. R
# of products/Box* 12 10 6 6 8 10 9 12 20 24
*. See last page
incoming material will be delivered to the proposed warehouse by standard trailer
trucks from the two suppliers in New York and Charlotte NC. The warehouse after
quality control and repacking will distribute the products, on a daily basis, to the
major customers located in the following three general areas (see Figure 1). Note
that the warehouse is designed to serve only these 3 areas and for now it is
assumed that the primary function of the warehouse will be limited to serve only
these clients.
a)- Sharon, PA and area within a radius of 20 miles from the center of the city}.
* See figure 1 last page
R** is used for rectangular shape. C** is used for cylindrical shape
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b)- Several small companies (customers) in Twinsburg Ohio and surrounding area
c)- several mid-size companies near Salem Ohio (and area within 25 miles) which includes southern part of Mahoning county.
The company has provided the following preliminary information about the type
of storage/distribution system they plan to build and planned flow of material into
and out of warehouse.
1)-Material are shipped and received daily as follows:
a)- shipping to customers is scheduled 6:00 am to 3 pm
b) receiving from suppliers is usually on a random basis between 5am and
2:00pm
2)- The warehouse operates 5:00 am to 4:00pm, 6 days a week.
3)- Trucks used by the suppliers on average are 42’ x 8.5’ x 11’ (L x W x H). Note that
you can load a truck only for a height of 9’. (A 2’ allowance for picking the top
pallet/load on a stack).
4)- The size of the trucks for fast delivery to customers must be decided by the design
Engineers
5- The time the material stays in inventory (shown in table 1) are rounded to the
nearest number of days.
The Company has decided on two possible sites near interstate Route76. The area
was recently converted to industrial park. The company is expected to finalize the
site selection process in a few months. To expedite the project, they recently hired
your facilities design team to develop detailed layout and design the warehouse
unit. Specifically, they want you to determine the following and submit a
comprehensive report on your findings/recommendations.
1. Location of the facility with the objective of minimizing the transportation cost
2. Size of the warehouse which will accommodate storage requirements at least for the next 10 years. The Company expects only a moderate increase
(about 2.5% per year) in storage capacity requirement during the next 10
years.
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3). The best storage arrangement for the six items in the table. The optimum
arrangement is expected to minimize material handling cost. In preparing the
layout, assume 12 ft aisle space is needed along with clearance of 3” between
stacks, and one-foot overhead. It is desirable to use a modern rack system (1-
3 high). Note that we need a clearance of 6’’ for rack supports.
4). Number of lift trucks (or other form of handling equipment required)
5). Storage dimensions, layout and cost of the system. (based of the # of
Operators, Racks, …needed)
6). Number and location(s) of shipping/receiving docks. A time study of loading
and unloading time required per shipping/receiving will be conducted and
result reported to the facilities design engineers.
7) Other information will be provided later.
8)- The size and number of trucks that the warehouse should use to accommodate
daily fast delivery to the customers at minimum time and cost, The type, size
and routing of the trucks will be decided by the design engineers.
Figure 1, Supple and distribution network
Supplier #1
Customer New York
Area #2
Customer
Area #1
Customer
Area #3 Charlotte
N. Carolina
Project Data
1)-Location Information
Customers/distribution area #1 #2 #3
Assumed center of gravity Twinsburg Sharon Salem
OH PA OH
Warehouse
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2)-Supply and demand data
Product Code/ % from supplier % shipped to customer
Type SKU # # 1 #2 #1 #2 #3
--------- ---------- ----------- ------------ --------- -------- ----------
A med119 100 - 35 28 37
B med 228 40 60 45 - 55
C med337 100 - 78 22
D meq432 100 - 100 - -
E meq543 - 100 30 55 15
F heq998 100 0 - 100 -
G heq990 100 0 42 58
H meq556 - 100 47 - 53
I med449 100 - - - 100
J med665 30 70 60 40 -
2- Loading/Unloading Times
The time between when a truck arrives and when it leaves the shipping/receiving
are (completing pick up or delivery), is divided into 3 components as follows:
Component duration in minutes Comments
----------------------------- --------------------------- ------------------------------ Waiting 22- 50 Observed mean= 32 min.
Reporting to shipping/ 8-19 Observed mean = 11 min
Office, Paperwork, 8-12. Observed mean = 10 min
Loading or unloading 41- 85 Observed mean = 56 min
3-Data on rejects and spoilage
A)- All of the incoming material are planned to be processed and within a few days
(see Table 1) shipped to customers. However, historical data indicates that about
2.5% of incoming material (those rejected because of damage and quality problem)
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stay in the warehouse for an average of 2 months, this is because the rejected
material are scheduled to be shipped out on a bimonthly basis.
B)- Type and sizes of pallets to be used in transportation, handling and storage of
the products must be decided by the design engineers.
WHAT IS REQUIRED.
1-Design and layout of a warehouse that will satisfy the current and possibly future
demand. Determine the geometry, dimensions, and all requirements for a modern
warehouse/logistic system. Note that a review of the historical data shows an
average increase of 2.5% in demand for the above 10 products, and he trend is
expected to continue for the next 10 to `15 years.
2-Determine the number and type/sizes of small trucks the company need to
purchase for delivering material on a daily basis, to the customers.
3-Determine Number and skill level of workers required for the facility.
4-Determine type and number of material handling equipment needed for
warehouse operations (i.e., unloading, loading, moving material,).
-Design/recommend Management system for the warehouse. Type and number of
docks required. Designing staging, receiving and shipping areas and operation
procedures for those areas.
-Determine sizes and layout of the total facility (inside and outside) preferably
based on current industry standards for this type of storage facilities.
-Develop an optimal delivery schedule/system to the customers.
-Others……………. (will be discussed in classroom)
NOTES AND DISCUSIONS
The following lecture notes and instructions (see Chapter 10 of the textbook) are
developed to assist the warehouse designers in better understanding and
applications of design methods. The lecture notes include
Activities list. The list and schedule of all activities/steps involved in the
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Planning and design of this project
Lecture Note 1: Unit Load analysis and determining Input/output in
“Number of pallets. (Unit load/Box design is taken out in this
project)
Lecture Note 2: Determining number of docks and material handling
equipment
Lecture Note 3: Warehouse Space Planning
Lecture Note 4: Warehouse Location Analysis
Lecture Note 5: Sample warehouse space planning and layout
Design Instruction set 1: Discussion on specific design problem, part I
Design Instruction set 2: Discussion on specific design problems, part II
Warehouse design Project Schedule of activities
Should be
LIST OF ACTIVITIES completed by:
Step 1: Becoming familiar with the project and what is the objective.
Designing a Set of appropriate unit Loads. (This part is eliminated By….TBD
In this project to save time)
Step 2: Determining FT2 area needed for storage only. This requires
determining or if not possible assuming the followings: By…TBD
Develop type and dimension of the Unit Loads
Determining number of units loads of each type (to be stored, moved,)
Determining how different products will be assigned to unit loads
Determining Average, Maximum, number of days each stock will/should stay
In Inventory (10) . How to store the unit loads in warehouse (random, selective,)
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LIST OF ACTIVITIES completed by:
Step 2: Analysis of inflow of material (how, when, frequency) into
warehouse from Internal and external suppliers, and from
warehouses to customers. By…
Examine alternative size trucks ➔ how many trucks required,
Determine (rough) delivery schedules. In doing so, we have to determine
whether to use dedicated truck-loads for each customer or utilize a
Transshipment type flow network (Routing Policies?)
Step 3: Determining size of the warehouse and number/dimensions
of the internal and external components of the warehouse
building including. By………
Determining total ft2 of area required to store the inventory (2) # of Receiving and Shipping docks # and ft2 area for staging operations # and sizes of processing areas Ft2 office space needed Ft2 area for rejects, equipment maintenance, and other functions Aisle Space required Area for future expansion and others
Step 5: Storage policies and patterns, Layout of the Warehouse (3) By……
Determine storage pattern (how many high, storage policy. Type
and number of racks, shelves, and so on
Type and number of material handling equipment (hand truck, Lift
truck,) for inside the warehouse.
layout of the warehouse, offices and other areas
Step 6: Planning the space, parking, layout and other outside
Layout of features of the warehouse By……..
Step 7: Developing the warehouse management/Operating
system and financial Analysis/justification of the
warehouse, and Preparing the Final (Project) Report By ……..
Step 8: Preparing the final report and presentation By……..
(1) This decision is made by company management. It is a company policy.
(2) This item and step 5storage policies and patterns. Layout of the Warehouse (3)
should be done simultaneously.
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Figure 1: Pictures of pallet loads &
Lift Truck carrying the loads
A)-Pallets Load:
Standard pallet (6” high/thick)
(Note: There are 18 boxes in this pallet-load)
B)- Lift Truck moving Pallet-loads