assesment

Faculty of Engineering, Environment and Computing

7099MAA Module Title Optimisation and Simulation

Assignment Brief 2020/21

Module Title Optimisation and Simulation	Ind		Cohort (Sept/Jan/May)	Module Code 7099MAA
Coursework Title (e.g. CWK1) Simulation				Hand out date:
Lecturer Ivan Arokiam				Due date: 29-11-21 by 6pm
Estimated Time (hrs): 50		Coursework type: Resit/Deferred Report
Submission arrangement online via Aula File types and method of recording: MS Word or Pdf Mark and Feedback date:TBC Mark and Feedback method:Online

Module Learning Outcomes Assessed: 1. Appraise the principles and techniques associated with operations management and other related production engineering modelling techniques. 2. Understand and analyse logic/ flow of production operations and be able to identify deficiencies/ bottlenecks in any engineering production facility. 3. Utilise both of mathematical and simulation problem solving techniques and methodologies to understand, solve then optimise problems in the area of production engineering and operations management. 4. Predict and proactively resolve any operational engineering disruptions using mathematical and simulation tools to support the decision making process for a future state design.

Task and Mark distribution: Please see Page 2 and onwards

Notes: 1. You are expected to use the CUHarvard referencing format. For support and advice on how this students can contact Centre for Academic Writing (CAW) . 2. Please notify your registry course support team and module leader for disability support. 3. Any student requiring an extension or deferral should follow the university process as outlined here . 4. The University cannot take responsibility for any coursework lost or corrupted on disks, laptops or personal computer. Students should therefore regularly back-up any work and are advised to save it on the University system. 5. If there are technical or performance issues that prevent students submitting coursework through the online coursework submission system on the day of a coursework deadline, an appropriate extension to the coursework submission deadline will be agreed. This extension will normally be 24 hours or the next working day if the deadline falls on a Friday or over the weekend period. This will be communicated via email and as a Aula announcement. 6.

Mark allocation guidelines to students (to be edited by staff per assessment)

0-39	40-49	50-59	60-69	70+	80+
Work mainly incomplete and /or weaknesses in most areas	Most elements completed; weaknesses outweigh strengths	Most elements are strong, minor weaknesses	Strengths in all elements	Most work exceeds the standard expected	All work substantially exceeds the standard expected

7099MAA Optimisation and Simulation

Deferred and Resit Coursework (Please submit via Aula - before 6pm on 29 Nov 2021)

Unique Light (UL) Ltd supplies two types of modern high-quality ceiling lamps to a retailer.  The packages supplied by UL Ltd are the Bright Silver (BS) and Hidden Gold (HG).  A package includes a base unit and four identical shades that would fit to the base units.  These are delivered in a box together but unassembled.  The BS package will consist of a base unit BSB and four shades BSS.  Similarly, the HG package will consist of a base unit HGB and four shades HGS.

The product proportions are BS 60% and the rest HG. The arrival rates are 1 every Random(Expo) 400 mins for the base and 1 every Random(Expo) 150 mins for the shades.

Bases and shades are made in parallel lines and then brought together to a third line for the purposes of packing.

On the Base line, BSB and HGB first pass through process M1 with cycle time of Norm(35,2) min per item regardless of type. Then BSB passes to Process M2 while HGB is sent to Process MX. MX takes 5min per item. 5% of HGB are rejected at MX. The rest, when processed on MX are sent to process M2. At M2 the processing time is Norm(165,2) min per item for BSB and Norm(132,2) min per item for HGB. From here they are sent to the packing line.

On the Shade line, BSS and HGS pass through process M3 with a cycle time of Norm(70,1) and Norm(50,1) min per item respectively. BSS is sent to process M4 which takes 10 min per item. From here they are sent to the packing line. HGS is sent to the packing line once processed by M3.

On the packing line, M5, one base and 4 shades are packed by type. The packing process takes 60 min per package.

(a) Develop and explain the flowchart and Arena model for the manufacture of lamp packages. (Assume every process has one independent resource).

[40 Marks]

(b) Modify model from (a) by adding worker resource in each of the machining areas. Then find the optimal number of workers for this case. Explain your modifications and findings. (Workers are considered as multi skilled resource)

[20 Marks]

(c)

(i) Explain any other refinement(s) that can be made to the developed model.

[10 Marks]

(ii) In the future, there is expected to be a new process added to the base line. This process does not have a constant cycle time. Explain the steps you will take to identify the distribution of the cycle time.

[10 Marks]

Presentation [10 Marks]

Effort [10 Marks]

Prepare a report (Max word limit 4000 words) to include the following sections:

I. Summary

II. Introduction

III. Model Development [including flowcharts, relevant printouts, verification/validation]

IV. Discussion

V. Conclusion

In addition to the Main Written Report, also upload the simulation model files .doe(one for part a and one for part b with optimal worker numbers).