Question

Given the data table below develop the precedence network and perform the CPM calculations. Then, using...

Given the data table below develop the precedence network and perform the CPM calculations. Then, using the proposed crashing strategy calculate the normal, least-cost, and crash duration for the project below. Calculate the cost associated with each duration. Indirect cost (overhead) is $120 per day.

Activity

IPA

Duration

Cost $

Normal

Crash

Normal

Crash

A

-

5

4

$770

$900

B

-

3

2

$660

$700

C

A

7

4

$800

$1,070

D

A,B

4

3

$1,000

$1,110

E

B

6

4

$800

$920

F

C,D

6

5

$560

$630

G

D

5

3

$700

$810

H

F

8

4

$1,000

$1,260

I

E,G

4

3

$500

$580

J

H,I

3

2

$400

$600

Proposed crashing strategy:

Act

Duration

Cost $

Δ

Cost

Δ

Days

Δ cost Δ days

Days shortened

Norm

Crash

Norm

Crash

A

5

4

770

900

130

1

130

1

B

3

2

660

700

40

1

40

C

7

4

800

1,070

270

3

90

3

D

4

3

1,000

1,110

110

1

110

E

6

4

800

920

120

2

60

F

6

5

560

630

70

1

70

1

G

5

3

700

810

110

2

55

H

8

4

1,000

1,260

260

4

65

4

I

4

3

500

580

80

1

80

J

3

2

400

600

200

1

200

1
Engineering   Civil-Engineering   
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