The time estimates obtained from four contractors P, Q, R and S for executing a particular job are as
under:
|
Contractor |
Optimistic time, to |
Most likely time, tL |
Pessimistic time, tp |
|
P |
5 |
10 |
13 |
|
Q |
6 |
9 |
12 |
|
R |
5 |
10 |
14 |
|
S |
4 |
10 |
13 |
Which one of these contractors is more certain about completing the job in time?
|
Contactor |
Variation
|
|
P |
1.778 |
|
Q |
1 |
|
R |
2.25 |
|
S |
2.25 |
Contractor Q is more certain as its variance is minimum.
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