Dr. Lori Baker, operations manager at Nesa Electronics, prides herself on excellent assembly-line balancing. She has been told that the firm needs to complete 96 instruments per 24-hour day. The assembly-line activities are:
|
TASK
|
TIME (min)
|
PREDECESSORS
|
|
A
|
3
|
-
|
|
B
|
6
|
-
|
|
C
|
7
|
A
|
|
D
|
5
|
A, B
|
|
E
|
2
|
B
|
|
F
|
4
|
C
|
|
G
|
5
|
F
|
|
H
|
7
|
D, E
|
|
I
|
1
|
H
|
|
J
|
6
|
E
|
|
K
|
4
|
G, I, J
|
|
|
50
|
|
a) Draw the precedence diagram.
b) If the daily (24-hour) production rate is 96 units, what is the highest allowable cycle time?
c) If the cycle time after allowances is given as 10 minutes, what is the daily (24-hour) production rate? d) With a 10-minute cycle time, what is the theoretical minimum number of stations with which the line can be balanced?
e) With a 10-minute cycle time and six workstations, what is the efficiency?
f) What is the total idle time per cycle with a 10-minute cycle time and six workstations?
g) What is the best workstation assignment you can make without exceeding a 10-minute cycle time, and what is its efficiency?