8. The activities involved in a candlelight choir service are listed in the following table.

Construct the project network.

A:

B:

Activity Select music Learn music Predecessor(s)

A Duration (days)

2 14 C:

D:

E:

F:

G:

H:

I:

J:

K:

L:

M:

N:

0:

Make copies and buy books Tryouts Rehearsals Rent candelabra Decorate candelabra Set up decorations Order choir robe stoles Check out public address system Select music tracks Set up public address system Final rehearsal Choir party Final program A

B,C D

D F

D D

D

]

K E,G,L H,L,M I, N 6.5 (PM and PERT 281 14 3

70 14 1

1 7

7 14 1

1 1

1 9. The widening of a road section requires relocating ("reconductoring") 1700 feet of 13.8-kV overhead primary line. The following table summarizes the activities of the project.

Construct the associated project network.

Activity Predecessor(s) Duration (days)

A: Job review 1 B: Advise customers of temporary outage A !

2 C: Requisition stores A 1 D: Scout job A 1 2:

E: Secure poles and material C,D 3 F: Distribute poles E 3!2 G: Pole location coordination D 1 2:

If: Re-stake G I 2:

I: Dig holes H 3 J: Frame and set poles F,l 4 K: Cover old conductors F,l 1 L: Pull new conductors J,K 2 M: Install remaining material L 2 N: Sag conductor L 2 0: Trim trees D 2 1

P: De-energize and switch lines B,M,N,O 10 Q: Energize and switch new line P 1 2:

R: Clean up Q 1 s: Remove old conductor Q 1 T: Remove old poles S 2 U: Return material to stores R,T 2

!O. The following table gives the activities for buying a new car. Construct the project network.

" .

.-~ , A:

B:

C:

D:

E:

F:

G:

H:

Activity Conduct feasibility study Find potential buyer for present car List possible models Research all possible models Conduct interview with mechanic Collect dealer propaganda Compile pertinent data Choose top three models Predecessor(s)

A A

C C

C D,E,F G

Duration (days)

3 14 1

3 1

2 1

1 282 Chapter 6 Network Models I:

J:

K:

L:

M:

N:

0:

Test-drive all three choices Gather warranty and financing data Choose one car Choose dealer Search for desired color and options Test-drive chosen model once again Purchase new car H

H l,J K

L L

B,M,N 3

2 2

2 4

1 3