Total task Time calculation:
Task |
Time(second) |
Task that must Precede |
A |
20 |
- |
B |
27 |
A |
C |
14 |
A |
D |
15 |
A |
E |
12 |
B,C |
F |
28 |
D,E |
Total task Time |
116 |
Time available per week = 40 hours *60 minutes * 60 seconds = 144,000 seconds
Units required = 4,800 units per week (demand)
Cycle Time = Time available per week/ Units required per week
=144,000 seconds / 4,800 units = 30 seconds per unit
Therefore cycle time is 30 seconds per unit.
The theoretical minimum number of workstations = Total time or sum of required for all the task / cycle time
= 116 seconds / 30 second = 3.87 or 4 workstations (next whole number)
Workstation (cycle time= 30 seconds) |
Tasks in order |
Workstation Time (sec) |
Idle time (sec) (workstation time – cycle time) |
1 |
A |
20 |
10 |
2 |
B |
27 |
3 |
3 |
C,D |
14+15 =29 |
1 |
4 |
E |
12 |
18 |
5 |
F |
28 |
2 |
Total |
44 |
All jobs are not assigned to the theoretical minimum number of workstations and number of work stations are 5.
I need help with the total idle time per cycle question, please include steps with explanations...
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