Table contains information about an environmental clean-up project. Shorten the project three weeks by finding the minimum-costs schedule. Assume that project indirect costs and penalty costs are negligible. Identify activities to crash while minimizing the additional crash costs.
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TABLE 2.5
ENVIRONMENTAL PROJECT DATA
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|
Activity
|
Normal Time (weeks)
|
Crash Time (weeks)
|
Cost to Crash ($ per week)
|
Immediate Predecessor($)
|
|
A
|
7
|
6
|
200
|
None
|
|
B
|
12
|
9
|
250
|
None
|
|
C
|
7
|
6
|
250
|
A
|
|
D
|
6
|
5
|
300
|
A
|
|
E
|
1
|
1
|
-
|
B
|
|
F
|
1
|
1
|
-
|
C, D
|
|
G
|
3
|
1
|
200
|
D, E
|
|
H
|
3
|
2
|
350
|
F
|
|
I
|
2
|
2
|
-
|
G
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