The R&D dept. is planning to bid on a large project for the development of a new

Question

The R&D dept. is planning to bid on a large project for the development of a new communication system for commercial planes.  The accompanying table shows the activities, time & sequence required:

Activity

Immediate predecessor

Time (weeks)

A

---

3

B

A

2

C

A

4

D

A

4

E

B

6

F

C,D

6

G

D,F

2

H

D

3

I

E,G,H

3

A.      Draw the Network Diagram

B.      What is the critical path?

C.      Suppose you want to shorten the completion time as much as possible, & you have the option of shortening any or all of B,C,D, and G each one week.  Which would you shorten?

D.      What is the new critical path & earliest completion time?

Please solve using Microsoft Excel & show any work if possible.  Thanks!

Activity

Immediate predecessor

Time (weeks)

A

---

3

B

A

2

C

A

4

D

A

4

E

B

6

F

C,D

6

G

D,F

2

H

D

3

I

E,G,H

3

Explanation / Answer

A)

F
B
A
======================================================================================
B. What is the critical path?

. A-C-F-G-I, and A-D-F-G-I.

======================================================================================

c.

C: one week;

D: one week;

G: one week.

======================================================================================
D)

Two paths:

A-C-F-G-l and

A-D-F-G-I, 16 weeks

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