Question

In: Statistics and Probability

Using the following data for questions below. Activity Time (hrs) Pred 1 Pred 2 Pred 3...

Using the following data for questions below.

Activity

Time (hrs)

Pred 1

Pred 2

Pred 3

A

2

B

7

C

15

A

B

D

18

A

B

E

6

A

B

F

5

C

D

E

G

5

C

D

E

H

7

E

F

I

9

E

F

J

12

H

I

What is the expected project completing time?

A. 86 hrs

B. 51 hrs

C. 65 hrs

D. 34 hrs

What is the critical path?

A. Activities: B, D, F, I, J

B. Activities: A, B, C, D, E, F, G, H, I, J

C. Activities: B, C, F, I, J

D. Activities: B, D, E, F, G, I, J

How much slack does activity A have?

A. none

B. 5

C. 3

D. 2

What is the earliest start time for activity J?

A. 39

B. 51

C. 30

D. 32

Solutions

Expert Solution

network diagraom us shown below:

Q-A) Expected project completion time = 51hrs.

Option - B

Q-B)

Duble line shows critical path, ES=LS & EF = LF

Critical path is B-D-F-I-J

Option -A

Q-C)

Slack of activity A

Slack of the activity = LF-EF = 7-2 =5

Slack of the activity = LS-ES = 5-0 =5

Option -B

Q-D)

Earliest Start Time of Activity J is 39hrs.

Option-A


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