Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table: Time (days) Immediate Activity a m Predecessor(s) A 3 B 4. 6 1 3 D 9 E 1 3 5 В, D F 3 4 A, E G 7 9 13 A, E H. 11 12 13 F 3 5 7 G J 15 17 19 K 4. 12 H, I This exercise contains only part a. a) Based on the activity time estimates, the expected times and variance for each of the activities are: (Round your responses to two decimal places.) Activity Expected Time Variance A

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
Section: Chapter Questions
Problem 59P
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Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some
of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in
days) for a new contract are given in the following table:
Time (days)
Immediate
Activity
Predecessor(s)
a
A
3
8
B
4.
5
3
D
7
8
6.
В, D
А, Е
А, Е
E
1
3
F
2
3
4
7
9
13
11
12
13
F
7
J
15
17
19
K
4
12
H, I
This exercise contains only part a.
a) Based on the activity time estimates, the expected times and variance for each of the activities are:
(Round your responses to two decimal places.)
Activity
Expected Time
Variance
A
Transcribed Image Text:Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table: Time (days) Immediate Activity Predecessor(s) a A 3 8 B 4. 5 3 D 7 8 6. В, D А, Е А, Е E 1 3 F 2 3 4 7 9 13 11 12 13 F 7 J 15 17 19 K 4 12 H, I This exercise contains only part a. a) Based on the activity time estimates, the expected times and variance for each of the activities are: (Round your responses to two decimal places.) Activity Expected Time Variance A
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ISBN:
9781337406659
Author:
WINSTON, Wayne L.
Publisher:
Cengage,