Question

Use the following data for problems 34, 35, and 36

Activity	Activity Predecessor	Time (days)
A	--	4
B	--	12
C	A, B	15
D	A, B	8
E	A, B	6
F	C, D, E	14
G	C, D, E	3
H	F, G	6

1. The expected completion time for the project above is?
   1. 27 days
   2. 68 days
   3. 47 days
   4. 30 days
2. The critical path for the project is?
   1. B, C, F, H
   2. B, C, F, G, H
   3. A, C, F, G
   4. A, C, E, H
3. How much slack is there in activity G?
   1. 7 days
   2. 8 days
   3. 11 days
   4. 0 days (no slack)

Answer 1

The activity diagram is as follows.

(1)

The expected completion time for the project above is (C) 47 days.

(2)

The critical path for the project is (A) B, C, F, H.

(3)

For activity G,

• Earliest stating time (EST) = 27 days
• Latest finish time (LFT) = 41 days
• Duration (d) = 3 days

So, slack = LFT - EST - d = (41-27-3) days = 11 days

Hence, slack in activity G is (C) 11 days.