15.21 A moving belt line is used to assemble a product whose work content = 22 min. Production rate =35 units/hr, and the proportion uptime = 0.96. The length of each station = 2.0 m and station manninglevel = 1.0 for all stations. The belt speed can be set at any value between 0.6 and 3.0 m/min. It isexpected that the balance delay will be about 0.08 or slightly higher. Time lost for repositioning eachcycle is 6 sec. (a) Determine the number of stations needed on the line. (b) Using a tolerance time that is!!%!50% greater than the cycle time, what would be an appropriate belt speed and spacing between parts?

Answered: 15.21 A moving belt line is used to…

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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Before completing production, a product must passthrough three stages of production. On the average, a newproduct begins at stage 1 every 6 minutes. The average timeit takes to process the product at each stage is as follows:stage 1, 3 minutes; stage 2, 2 minutes; stage 3, 1 minute.After finishing at stage 3, the product is inspected (assumethis takes no time). Ten percent of the final products arefound to have a defective part and must return to stage 1 andgo through the entire system again. After completing stage3, 20% of the final products are found to be defective. Theymust return to stage 2 and pass through 2 and 3 again. Onthe average, how many jobs are in the system? Assume thatall interarrival times and service times are exponential andthat each stage consists of a single server.
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