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Business Studies

Levels of Management

The optimisti...

Question

The optimistic, most likely and expected completion time of an activity are 4 days, 11 days and 10 days respectively. The pessimistic time of this activity will be________ days.

12

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Solution

The correct option is A 12
Expected time, $t_{c} = \frac{t_{0} + 4 t_{m} + t_{p}}{6}$
$\Rightarrow 10 = \frac{4 + 4 \times 11 + t_{p}}{6}$
So, $t_{p} = 12$ days

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Q. Consider the following PERT network:

The optimistic time, most likely time and pessimistic time of all the activities are given in the table below:

Activity	Optimistic time (days)	Most likely time (days)	Pessimistic time (days)
1 - 2	1	2	3
1 - 3	5	6	7
1 - 4	3	5	7
2 - 5	5	7	9
3 - 5	2	4	6
5 - 6	4	5	6
4 - 7	4	6	8
6 - 7	2	3	4

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Q. Consider the following PERT network:

The optimistic time, most likely time and pessimistic time of all the activities are given in the table below:

Activity	Optimistic time (days)	Most likely time (days)	Pessimistic time (days)
1 - 2	1	2	3
1 - 3	5	6	7
1 - 4	3	5	7
2 - 5	5	7	9
3 - 5	2	4	6
5 - 6	4	5	6
4 - 7	4	6	8
6 - 7	2	3	4

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Q. The expected time

(t_{e})

of a PERT activity in terms of optimistic time

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pessimistic time

(t_{p})

and most likely time

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Q. A PERT network consists of 5 activities with the following duration.

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