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Operations Management
total number of number of total number number of requests second calls of requests second calls Week Week 1 200 6 11 100 1 2 250 12 100 3 250 13 100 1 4 250 7 14 200 4 5 200 200 3 15 200 200 5 3 6. 4 16 7 150 2 17 200 10 8. 150 150 1 18 200 4 9. 19 250 10 150 20 250

total number of number of total number number of requests second calls of requests second calls Week Week 1 200 6 11 100 1 2 250 12 100 3 250 13 100 1 4 250 7 14 200 4 5 200 200 3 15 200 200 5 3 6. 4 16 7 150 2 17 200 10 8. 150 150 1 18 200 4 9. 19 250 10 150 20 250

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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A maintenance group wants to increase the effectiveness of the repair work by tracking the number of maintenance requests that require a second call to complete the repair. The table below shows the data for 20 weeks. Is this process under control in terms of the rate of maintenance requests requiring a second call? Indicate whether the process is under control by drawing appropriate control charts / graphs.

total number of number of total number number of requests second calls of requests second calls www m w Week Week wwm. ww 1 200 6. 100 11 12 1 250 8 100 3 250 9. 13 100 1 250 7 14 200 4 5 200 3 15 200 5 200 4 16 200 3 7 150 2 17 200 10 8 150 1 18 200 4 150 19 250 7 10 150 20 250
Transcribed Image Text:total number of number of total number number of requests second calls of requests second calls www m w Week Week wwm. ww 1 200 6. 100 11 12 1 250 8 100 3 250 9. 13 100 1 250 7 14 200 4 5 200 3 15 200 5 200 4 16 200 3 7 150 2 17 200 10 8 150 1 18 200 4 150 19 250 7 10 150 20 250
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