Given the following network with activities and times estimated in days, Most Ac
ID: 453900 • Letter: G
Question
Given the following network with activities and times estimated in days,
Most
Activity Optimistic Probable Pessimistic
A 2
5
6
B 1
3
7
C 6
7
10
D 5
12
14
E 3
4
5
F 8
9
12
G 4
6
8
H 3
6
8
I 5
7
12
J 12
13
14
K 1
3
4
A) Fill in all the blanks in the following table.
Note:
i) To reduce the computation load, please round the expected activity time (t) up to an integer if the computed expected activity time is not an integer. For example, if tA=4.15, round it up to 5.
ii) For variance (2) in activity time, keep two decimal places.
Activity
Precedence Activities
Expected Time t (days)
Varianc e 2
ES
LS
EF
LF
Slack
Critical Path?
A
B
C
D
E
F
G
H
I
J
K
B) What is the expected time and variance to complete the project?
C) What is the probability the project will take more than 28 days to complete?
D) Suppose activity G were delayed for 7 days. By how much would the entire project be delayed?
A 2
5
6
B 1
3
7
C 6
7
10
D 5
12
14
E 3
4
5
F 8
9
12
G 4
6
8
H 3
6
8
I 5
7
12
J 12
13
14
K 1
3
4
Explanation / Answer
Expected time and variance of each activity is computed by the following formulas ,
Precedence activities are not provided in the question, so network diagram cannot be drawn. For further solution, please provide the precedence activities for each activity.
µ = (to + 4tm + tp)/6 v = {(tp-to)/6 }2Related Questions
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