9.15 As part of a major plant renovation project, the industrial engineering dep

Question

9.15 As part of a major plant renovation project, the industrial engineering department has been asked to balance a revised assembly operation to achieve an output of 300 units per eight-hour day Task times and precedence relationships are as follows: Immediate Predecessor Duration (minutes) 0.3 0.4 0.5 0.6 1.2 1.3 1.0 Task a. b. c. d. e. Determine the minimum cycle time Determine the maximum cycle time Determine the calculated cycle time (based on the target output rate) Determine the theoretical minimum number of stations needed Compute the efficiency (Based on the actual number of stations) f. g. Draw the precedence diagram (no need to submit the answer) Come up with a possible result of grouping (no need to submit the answer)

Explanation / Answer

a) Minimum cycle time = Maximum processing duration of a task = 1.3 minutes

b) Maximum cycle time = Sum of all duration of task = 0.3 + 0.4+0.5+0.6+1.2+1.3+1 = 5.5 minutes

c) Required cycle time = Total time available / output = 8 / 300 hours OR 480/300 minutes = 1.6 minutes

d) Number of Stations required = Theortical maximum cycle time / Required cycle time = 5.5 /1.6 = 3.4 stations or rounded off to 4 stations

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