are157-homework-1 - ARE 157 ANALYSIS FOR PRODUCTION...

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ARE 157 ANALYSIS FOR PRODUCTION MANAGEMENT Homework I, due April 14, at start of class Spring 2010 M.Whitney 1. (9) Magnwn Products packages lawn fertilizer for sale to local garden stores. Each bag is labeled as containing 20 pounds. In order to ensure that no customers are shorted, the firm requires that each bag contains at least 20 lbs., with a target of 20.1 lbs. and an upper limit of 20.2 lbs. The firm operates two packaging machines, and wishes to check whether they are performing satisfactorily. A sample from each is taken, with the following results: Machine A Machine B 1 bag contained 20.01 1 bag contained 20.04 3 bags contained 20.02 2 bags contained 20.05 5 bags contained 20.06 2 bags contained 20.07 6 bags contained 20.10 ' 5 bags contained 20.10 4 bags contained 20.12 6 boxes contained 20.15 1 bag contained 20.15 4 boxes contained 20.17 a (1) After looking at the 2 samples above, one employee concluded that both machines are operating satisfactorily, since none of the sampled bags were out of tolerance. Explain why this is not a satisfactory criterion for quality control purposes. b.
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This note was uploaded on 10/06/2010 for the course ARE 51800 taught by Professor Whitney during the Spring '10 term at UC Davis.

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are157-homework-1 - ARE 157 ANALYSIS FOR PRODUCTION...

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