Probability values based on the normal distribution.
Tom, a director of Management Resources, Inc., is in the procedure of designing a program that his customers can use in the job finding process. Some of the activities include preparing resumes, writing letters, making appoints, researching companies, and so on. Some of the information on the activities is shown in the following table:
|
|
Days
|
Immediate Predecessors
|
|
Activity
|
a
|
b
|
c
|
|
|
|
A
|
8
|
10
|
12
|
-
|
|
B
|
6
|
7
|
9
|
-
|
|
C
|
3
|
3
|
4
|
-
|
|
D
|
10
|
20
|
30
|
A
|
|
E
|
6
|
7
|
8
|
C
|
|
F
|
9
|
10
|
11
|
B, D, E
|
|
G
|
6
|
7
|
10
|
B, D, E
|
|
H
|
4
|
15
|
16
|
F
|
|
I
|
10
|
11
|
13
|
F
|
|
J
|
6
|
7
|
8
|
G, H
|
|
K
|
4
|
7
|
8
|
I, J
|
|
L
|
1
|
2
|
4
|
G, H
|
Decide the probability that the project will be completed in 90 days or less.