Given is a Project with network diagram and activity times as shown below. Activ
ID: 3177101 • Letter: G
Question
Given is a Project with network diagram and activity times as shown below.
Activity
A
B
C
D
E
F
G
H
I
J
Time (wks)
11
8
11
15
13
19
15
9
16
11
a) The Earliest Start (ES) time of Activity I = __________ weeks
b) The Latest Start (LS) time of Activity B = __________weeks
c) The Slack time of Activity C = __________weeks
d) The Earliest Finish (EF) time of Activity H = _________weeks
e) The Latest Finish (LF) time of Activity B = __________weeks
f) The Project Completion time = ___________weeks
Activity
A
B
C
D
E
F
G
H
I
J
Time (wks)
11
8
11
15
13
19
15
9
16
11
Given is a Project with network diagram and activity times as shown below. Start 11 13 19 ctivityExplanation / Answer
The different paths of the project are as follows:
1.Start-->A-->B-->E-->H-->J = 11 + 8 + 13 + 9+11 = 52 weeks
2.Start-->A-->B-->G-->I-->J = 11+8+15+16+11 = 61 weeks
3.Start-->A-->C-->H-->J = 11+11+9+11 = 42 weeks
4.Start-->D-->F-->I-->J = 15+19+16+11 = 61 weeks
2 and 4 are critical paths of the project
a) I cannot be started unless G and F are done,
Early finish of F = 15 + 19 = 34
Early finish of G = 11+8+15 = 34
Since both are 34, the Early start of Activity I is 34 weeks
b) Latest time of activity B , Since B is in the critical path
The Latest time of activity B is same as early start = 11 weeks
c) The Slack time of Activity C,
Slack time = Late start - Early start of activity C = 21 - 11 = 10 weeks
Late start is the longer path time of activity H - Activity C time = 32 - 11 = 21
The Slack time of Activity C = 10 weeks
d) The Earliest Finish (EF) time of Activity H = 32 + 9 = 41 weeks
e) Latest Finish time of activity B = Late start + activity B time = 11+8 = 19 weeks
f) The project completion time is the time of the critical path = 61 weeks
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