R.C. Coleman
Autor: Storey • November 8, 2018 • Essay • 608 Words (3 Pages) • 397 Views
R.C Coleman has recently changed the way their warehouse system works. Due to high costs and low productivity, this company needs to change the way they operate. This company is now turning to an automated way of moving goods from the storage area to the shipping area in their facility. R.C. Coleman’s management established a required 40-week completion time for this project.
The project manager has compiled a list of activities and their immediate predecessor for the new system. Determining the sequence of activities can be done by using the predecessors. The following image represents the path of the activities.
[pic 1]
Determining how long each activity is going to take, is computed by using the optimistic, most probable and pessimistic timeline value and computing the value. The expected time gives the most accurate picture of how long the activities will take giving consideration to each variable.
Activity | Optimistic | The Most Probable | Pessimistic | Expected Time | Variance |
A | 4 | 6 | 8 | 6 | 0.44 |
B | 6 | 8 | 16 | 9 | 2.78 |
C | 2 | 4 | 6 | 4 | 0.44 |
D | 8 | 10 | 24 | 12 | 7.11 |
E | 7 | 10 | 13 | 10 | 1.00 |
F | 4 | 6 | 8 | 6 | 0.44 |
G | 4 | 6 | 20 | 8 | 7.11 |
H | 4 | 6 | 8 | 6 | 0.44 |
I | 4 | 6 | 14 | 7 | 2.78 |
J | 3 | 4 | 5 | 4 | 0.11 |
K | 2 | 4 | 6 | 4 | 0.44 |
The critical path is the longest time path through the network, to determine this the earliest start, earliest finish, latest start and latest finish values are decided. For the earliest start and finish times, the forward pass method is used. The backward pass method is used to determine the latest start and finish time for each activity. This determines how long it will take to finish the project completely.
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