1. Construct a PERT network. [NOTE: This is the most crucial part of the exercise. Make sure you have the correct network before proceeding to the next sections.]

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Consider the following table:

ACTIVITY   PREC.    ACT.      TIME   ESTIMATES       (days)

                                                   to              tml                tp             te

A                     ---                       2                3                  4

B                     ---                        4                7                 10

C                      A                          1                 2                 3

D                      B                           2                5                 8

E                      B                            4                6                 8

F                    C , D                        1                 1                   1

G                      E                           3                 4                  5

H                   G , F                        3                 6                  15

 

1. Construct a PERT network. [NOTE: This is the most crucial part of the exercise. Make sure you have the correct network before proceeding to the next sections.]

 

2. By using ES, EF, LF, LS, find the slack of each activity and the critical path. Show times on network!

 

3. Find the completion time ( ) and the standard deviation (σ) for the project— round off the standard deviation to the nearest hundredth: two decimal places.

 

4. What is the completion time at 68% and 99.7% confidence levels?

 

5. What is the likelihood of this project being completed in less than 23 days?

 

6. Between 23 and 26 days? 

 
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