MBA Operations Management - Case Study Guides - 06: WESTOVER ELECTRICAL, INC.

WESTOVER ELECTRICAL, INC.

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Note: This is a case that can be used as an introduction to TQM
tools or after the tools are introduced as a learning tool demonstrating how Pareto analysis, control charts, and cause-and-effect
charts are used.
Pareto Analysis by Winder
Defect Combined W1 W2 W3
Abraded Wire 81 3 2 76
Failed Electrical Test 66 1 3 62
Broken Lead 66 62 2 2
Wrong Wire 22 2 19 1
Broken Winder 10 3 7 0
Tow Wire 9 5 4 0
Wrong Core 7 1 5 1
Totals 261 77 42 142
Analysis by Winder:
 Broken leads is a Winder 1 problem (94% of all broken leads
and 81% of Winder 1 problems)
 Wrong wire is a Winder 2 problem (86% of all wrong wires
and 45% of Winder 2 problems)
 Abraded wire and failed electrical test appear to be correlated
and to be a Winder 3 problem (54% and 44% of all Winder 3
problems, respectively).
Analysis by Time:
 Wrong wire and wrong core rejects occurred mainly at first of
month on Winder 2 (17/19 before 10th).
Control Charts:
 Could use p chart if it is assumed that any one defect results in
a defective unit, and there is no more than one defect per
inspected unit. Could use c chart to plot number of defects per
sample. Must do separate chart for each Winder.
Cause-and-Effect Chart:
 At least mention.
Recommendations:
 Find cause for abraded wire and failed electrical test on Winder
#3. Could same cause create both problems? Could eliminate
56% of all Winder rejects and 97% of Winder #3 rejects.
 Find cause for broken leads on Winder #1. Could eliminate
81% of Winder #1 rejects and 25% of all rejects.
 Find cause for wrong wire and wrong core early in month
on Winder #2. Could it be a new operator who made fewer
mistakes as he/she gained experience?
LO 6.6: Use the seven tools of TQM
AACSB: Analytical thinking
 





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OPERATIONS MANAGEMENT - 2017 - COLLECTION

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EBOOKS

Operations Management, 2015, 12th Edition, William J. Stevenson - Free Download Link
Operations Management, Sustainability and Supply Chain Management, 11th Edition, 2014, Jay Heizer, Barry Render - Free Download Link

Operations Management: Sustainability and Supply Chain Management, 12th Edition, Jay Heizer, Barry Render, Chuck Munson, 2017
Principles of Operations Management: Sustainability and Supply Chain Management, 10th Edition, 2017
Operations Research: An Introduction, 10th Edition, Hamdy A. Taha, 2017
Introduction to Operations and Supply Chain Management, 4th Edition, Cecil B. Bozarth, Robert B. Handfield, 2016 
Operations Management: Processes and Supply Chains, 11th Edition, Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman, 2016

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FREE DOWNLOADS:

1. Operations Management: Sustainability and SCM, 12th Edition, Jay Heizer, 2017

2. Operations Management, Sustainability and SCM, 11th Ed, 2014, Jay Heizer

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3. Principles of Operations Management: Sustainability and SCM, 10th Ed, Jay Heizer, 2017

Free Download Link
4. Operations Management, 2017, 12th Edition, William J. Stevenson

Free Download Link
5. Operations Management: Processes and Supply Chains, 11th Edition, Lee J. Krajewski, 2016

6. Operations Research: An Introduction, 10th Edition, Hamdy A. Taha, 2017
7. Introduction to Operations and SCM, 4th Edition, Cecil B. Bozarth, Robert B. Handfield, 2016 

8. Hotel Operations Management, 3rd Edition, David K. Hayes, 2017Ebooks – Free Download Links

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