In reference to the attached image and data below: What are the final recommendations? Step A we know: Critical Path = A, B, H, I, J; Project Time = 40 Weeks; Total Cost = 364,000 Step B we know: To crash the critical path I would crash A by 1 week, B by 2 week, H by 2 week and C by 3 week. This would not alter the critical path, only the time line.  Steps C we know: Modeling uncertainty in activity times. In this case I would use the activity times and determine the Variances and the Standard Deviation. Using “best case” (x) and “worst case” (y) scenarios for activity times the formula’s would be (x-y)/6 and (x-y)^2/36.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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In reference to the attached image and data below: What are the final recommendations?

Step A we know: Critical Path = A, B, H, I, J; Project Time = 40 Weeks; Total Cost = 364,000

Step B we know: To crash the critical path I would crash A by 1 week, B by 2 week, H by 2 week and C by 3 week. This would not alter the critical path, only the time line. 

Steps C we know: Modeling uncertainty in activity times. In this case I would use the activity times and determine the Variances and the Standard Deviation. Using “best case” (x) and “worst case” (y) scenarios for activity times the formula’s would be (x-y)/6 and (x-y)^2/36. 

Exhibit 19.20
Alternative Water Supply (AWS)
Activity Description
Immediate Regular Time
Crash Time
Normal Cost
ID
Predecess (weeks)
(weeks)
Estimate
or(s)
$ 30,000
$ 52,000
$ 59,000
$ 48,000
Conceptual design
Preliminary design
A
4
3
B
A
12
10
Final design
Environmental permit application
B
19
16
D
8
5
preparation
Environmental permit review and
approval
Building permit application
E
D
4
$ 38,000
F
E
2
1
$ 35,000
preparation
G
Building permit review and
F
4
4
$ 6,000
approval
Property acquisition
Bid project
Construction start (dummy activity
$ 90,000
$ 6,000
$ 0
H
B
20
18
C, H
4
4
G,I
4.
Transcribed Image Text:Exhibit 19.20 Alternative Water Supply (AWS) Activity Description Immediate Regular Time Crash Time Normal Cost ID Predecess (weeks) (weeks) Estimate or(s) $ 30,000 $ 52,000 $ 59,000 $ 48,000 Conceptual design Preliminary design A 4 3 B A 12 10 Final design Environmental permit application B 19 16 D 8 5 preparation Environmental permit review and approval Building permit application E D 4 $ 38,000 F E 2 1 $ 35,000 preparation G Building permit review and F 4 4 $ 6,000 approval Property acquisition Bid project Construction start (dummy activity $ 90,000 $ 6,000 $ 0 H B 20 18 C, H 4 4 G,I 4.
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