Calculating task-related information

The table below shows the tasks required to assemble an aluminum storm door and the length of time needed to complete each task.

Task Immediate
Predecessor Task Time
(sec)

A None 32
B A 43
C A 12
D A 23
E B, C, D 15
F E 25
G None 20
H F, G 5

Suppose a cycle time is 90 seconds.

(a) Compute the theoretical minimum number of workstations.

(Round your answer up to the nearest whole number.)

TM = workstations

(b) Compute the outputs.

(Round your answers to 2 decimal places, the tolerance is +/-0.05.)

The maximum output?

units per hour

The minimum output?

units per hour

(c) Compute the efficiency.

(Round your answer to 2 decimal places, the tolerance is +/-0.05.)

Efficiency = %

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