PM0011 [Project Planning & Scheduling] Set1 Q4

Q.4 Complete the below mentioned chart:

Activity	Pessimist	Most likely	optimist	PERT	Variance
A	20	12	10
B	30	25	18
C	105	80	56
D	200	145	85
E	145	112	89

Ans:

In the given problem PERT and variance need to be calculated:

                 

The formula for calculating the PERT is

PERT = (t_e) = (t_o +4t_m + t_p)/6

                                   

The formula for calculating the Variance is

Variance = (t_v) = (t_p - t_o)² /6

Where

t_o =  Optimistic or activity duration in best scenario.

t_m = Most likely or activity duration resource availability and dependencies are as assumed.

t_p = Pessimistic or activity duration in worst scenario.

                 

The solution of the given problem is as below:

                 

                 

Activity	Pessimist	Most likely	optimist	PERT	Variance
A	20	12	10	13	16.67
B	30	25	18	24.67	24.00
C	105	80	56	80.17	400.17
D	200	145	85	144.17	2204.17
E	145	112	89	113.67	522.67