How many observations should a time study analyst plan for in an operation that has a standard deviation of .4 minutes per piece if the goal is to estimate the mean time per piece to within .1 minute with a confidence of 95.5 percent?

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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How many observations should a time study analyst plan for in an operation that has a standard deviation of .4 minutes per piece if the goal is to estimate the mean time per piece to within .1 minute with a confidence of 95.5 percent?

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Lean is a way of working which focuses on the removal of waste within the processes. It mainly involves that expenditure of resources for any objective other than the creating value for the end customer is wasteful so should only target on elimination.

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