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Could Problem 9P, Chapter 5 of Managing Operations Across the Supply Chain (3rd. Edition) be solved...

Could Problem 9P, Chapter 5 of Managing Operations Across the Supply Chain (3rd. Edition) be solved please? Thank you!

Chapter 5, Problem 9P:

The Office Interiors Company has developed a new, modern office chair. Initial sales forecasts are for 50 chairs per day. The assembly operations will run for two eight-hour shifts. The process engineer and operations manager are working together to balance the line to make the new chair as efficiently as possible. The process engineer suggests using the longest operating time rule while the operations manager suggests using the most number of followers rule to design the line. If there is a tie, use the other rule to break the tie. Based on the processing information, which approach do you recommend? Why?

Task Time (minutes) Predecessor
A 7 -
B 12 A
C 6 B
D 13 -
E 8 C,D
F 10 -
G 4 F
H 10 E,G
0 0
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Answer #1

Answer 9P)

960 minutes 50 units Available time Desired output Optimum Cycle time -Available Time/Desired output or Demand rate 19.2 minutes Total Task Time Minimum # of stations neede = Total Task time / Cycle Time 70 4 minutes rounded up - Draw Precedence diagram > G Assignment of tasks to workstations as per most following task rulestation Eligible Task Assigned Task 13 10 Cumulative Idle Work- Time following Time Time Task (minutes) tasks Task Time A,D,F A,F A,G B,G C,G E,G 13 10 17 12 18 12 12 6 13 10 12 10 10 10 20 Total Idle Time End Total 70 18 Actual Cycle time Proposed # of w/s ldle Time per cycle (minutes)20 minutes Lead time (minutes) Efficiency of assembly line-70/90 = Total Task Time / Lead Time 90 Cycle Time x number of stations = 77.8%

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