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C

yclone

A

ppliances has developed a new

E

uropean

–

style convection oven that will be made on an assembly line. The schedule requires 96 ovens in an 8-hour day. The assembly includes seven tasks. The table below indicates the performance time and the sequence requirements for each task.

a.

D

raw the precedence diagram for the set of tasks.

b. Calculate the theoretical minimum number of workstations.

c. What tasks are assigned to which stations?

d. Does the solution have the minimum number of stations? Explain.

e. How much idle time is there, summed over all workstations?

f. What is the efficiency of this line?

Work Task

Task Time (seconds)

Task Predecessor(s)

A

70

–

B

60

A
C

120

B
D
60
–
E

240

C, D

F

100

A

G

190

E, F