Tailwind, Inc., produces high-quality but expensive training shoes for runners. The Tailwind shoe, which sells for $210, contains both gas- and liquid-filled compartments to provide more stability and better protection against knee, foot, and back injuries. Manufacturing the shoes requires 10 separate tasks. There are 400 minutes available for manufacturing the shoes in the plant each day. Daily demand is 60. The information for the tasks is as follows:
|
TASK
|
PERFORMANCE TIME (min)
|
TASK MUST FOLLOW TASK LISTED BELOW
|
|
A
|
1
|
-
|
|
B
|
3
|
A
|
|
C
|
2
|
B
|
|
D
|
4
|
B
|
|
E
|
1
|
C, D
|
|
F
|
3
|
A
|
|
G
|
2
|
F
|
|
H
|
5
|
G
|
|
I
|
1
|
E, H
|
|
J
|
3
|
I
|
a) Draw the precedence diagram.
b) Assign tasks to the minimum feasible number of workstations according to the "ranked positioned weight" decision rule.
c) What is the efficiency of the process you completed in (b)?
d) What is the idle time per cycle?