Consider a project which has been modeled as follows:
Activity Immediate
Predecessor (s)
Completion Time
(hours)
A
B
C
D
–
–
A
A
7
10
4
30

E
F
G
H
I
J
K
L
A
B,C
B,C
E,F
E,F
E,F
D,H
G,J
7
12
15
11
25
6
21
25
Required:
(a) Determine the project’s expected completion time and its critical path. (12
marks)
(b) Can activities E and G be performed at the same time without delaying the
completion of the project? (2
marks)
(c) Can one person perform A, G and I without delaying the project? (2
marks)
(d) By how much time can activities G and L be delayed without delaying the
entire project? (2
marks)
(e) By how much time would the project be delayed if activity G were delayed by 3
hours and activity L by 4 hours? Explain. (2
marks)