supply chain line balancing

timer Asked: Sep 25th, 2014

Question description

Employees at Ford work from 6am to 2pm Monday through Friday.  Everyone on the assembly line is allowed a 30 minute lunch and two 20 minute breaks.  Other cross-trained associates cover lunches and breaks for the associates on the assembly line so the line doesn’t stop.  After three weeks at Ford, you record the processes of the assembly line are laid out in the following manner:

Task  Predecessor  Average Time (sec)

A  none  50

B  none  40

C  A  20

D  C  45

E  C  20

F  D  25

G  E  10

H  B, F, and G  35

The Plant Manager needs the line to achieve an output of 400 units per day.

a)  Compute the Takt time for the line (2 points).

b)  What is the theoretical minimum number of workstations? (2 points)

c)  Draw the precedence diagram with the processing times for each task displayed (3 points).

d)  Assign tasks to work stations using the largest eligible task heuristic rule to break any ties (2 points).

e)  Compute the efficiency and percent idle time for the system (2 points).

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