operation management

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A firm is planning to set up an assembly line to assemble 40 units per hour. Assume that 57 minutes per hour are productive. The time to perform each task and the tasks preceding each task are as follows:
Task Preceding Task Time to Perform (Min)
A - 0.69
B A 0.55
C B 0.92
D B 0.59
E B 0.70
F B 1.10
G C, D, E 0.75
H G, F 0.43
I H 0.29

Draw a network diagram of precedence relationships. Compute the cycle time per unit in minutes. Compute the minimum number of workstations required to produce 40 units per hour. Balance the assembly line using the longest processing time. Calculate the efficiency of the balanced assembly line.

Microsoft Excel sheet.

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