A B C D E F LCHIK G Н J a 3 10 2 72250355 2 5 10 15 m 6 Activity A 11 3 8 4 11 3 5 17 9 3 9 b 8 12 4 9 6 4 14 12 7 19 13 Predecessor(s) C B, D A, E A, E F G C 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.) Expected Time Variance

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
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Please answer activity A-k
WABCDEFGHI
K
GFWÖGN N N Now
3
10
2
7
2
Activity
A
2
5
10
3
15
5
m
&59569 A & WIS
11
11
17
b Predecessor(s)
8
12
4
9
6
4
14
12
7
19
13
|||0
Expected Time
B, D
A, E
A, E
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.)
C
H, I
Variance
Transcribed Image Text:WABCDEFGHI K GFWÖGN N N Now 3 10 2 7 2 Activity A 2 5 10 3 15 5 m &59569 A & WIS 11 11 17 b Predecessor(s) 8 12 4 9 6 4 14 12 7 19 13 |||0 Expected Time B, D A, E A, E 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.) C H, I Variance
K
4
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:
TL:-
Activity
A
----------
BCDEFGH
I
J
K
a
3
10
0272250355
10
15
Time (days)
m
6
11
3
8
4
3
9
11
5
17
9
b
8
12
4
9
6
4
14
12
7
19
13
Immediate
Predecessor(s)
C
B, D
A, E
A, E
F
G
C
H, I
Transcribed Image Text:K 4 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: TL:- Activity A ---------- BCDEFGH I J K a 3 10 0272250355 10 15 Time (days) m 6 11 3 8 4 3 9 11 5 17 9 b 8 12 4 9 6 4 14 12 7 19 13 Immediate Predecessor(s) C B, D A, E A, E F G C H, I
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Step 1

Formula used-Expected time=(a+4m+b)6Variance=(b-a)236

 

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