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Operations Management
OBSERVATIONS (SECONDS) 1 2 3 4 5 PERFORMANCE RATING (%) ELEMENT Grasp and place bag Fill bag Seal bag Place bag on conveyor 110 8 9 8 11 112 7 36 41 39 35 85 15 17 13 20 18 105 8 6 9 30b 35b 90 Bag breaks open; included as delay in the allowance factor. bConveyor jams; included as delay in the allowance factor.

OBSERVATIONS (SECONDS) 1 2 3 4 5 PERFORMANCE RATING (%) ELEMENT Grasp and place bag Fill bag Seal bag Place bag on conveyor 110 8 9 8 11 112 7 36 41 39 35 85 15 17 13 20 18 105 8 6 9 30b 35b 90 Bag breaks open; included as delay in the allowance factor. bConveyor jams; included as delay in the allowance factor.

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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Question
The Dubuque Cement Company packs 80-pound bags
of concrete mix. Time-study data for the filling activity are shown in
the following table. Because of the high physical demands of the job,
the company's policy is a 23% allowance for workers.
a) Compute the standard time for the bag-packing task.
b) How many observations are necessary for 99% confidence,
within ±5% accuracy?
OBSERVATIONS (SECONDS) 1 2 3 4 5 PERFORMANCE RATING (%) ELEMENT Grasp and place bag Fill bag Seal bag Place bag on conveyor 110 8 9 8 11 112 7 36 41 39 35 85 15 17 13 20 18 105 8 6 9 30b 35b 90 Bag breaks open; included as delay in the allowance factor. bConveyor jams; included as delay in the allowance factor.
Transcribed Image Text:OBSERVATIONS (SECONDS) 1 2 3 4 5 PERFORMANCE RATING (%) ELEMENT Grasp and place bag Fill bag Seal bag Place bag on conveyor 110 8 9 8 11 112 7 36 41 39 35 85 15 17 13 20 18 105 8 6 9 30b 35b 90 Bag breaks open; included as delay in the allowance factor. bConveyor jams; included as delay in the allowance factor.
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