15. A study reveals that a group of three semi automatic machines assigned to one operator operated unattended 20 percent of the time. Operator service time at irregular intervals averages at 80 percent of the time on these three machines. a.) What would be the estimated machine hours lost per eight hour day because of lack of an operator? b.) What is the efficiency of three machines? c.) If the machine can produce 75 units per hour. If the operator rate costs $12 and the machine rate costs $35. What is the total expected cost for operating three machines?

15. A study reveals that a group of three semi automatic machines assigned to one operator operated unattended 20 percent of the time. Operator service time at irregular intervals averages at 80 percent of the time on these three machines. a.) What would be the estimated machine hours lost per eight hour day because of lack of an operator? b.) What is the efficiency of three machines? c.) If the machine can produce 75 units per hour. If the operator rate costs $12 and the machine rate costs $35. What is the total expected cost for operating three machines?

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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