SCHEDULING I

AUTOTEST # 4





1.-  Determine the arrow and circle network diagrams for the following project, and hence calculate the total float, free float and interfering float for each activity.
 

Activity
Duration
Immediately Following Activities
A
32
D J
B
12
C F
C
14
D J
D
10
-
E
13 
C F G
F
18
H I K
G
14
H I K
H
8
D J
I
10
J
J
14
-
K
22
-

2.-  Draw an arrow network diagram for the following project, calculate the earliest and latest starting and finishing times, and the total and free floats. Indicate critical activities by an asterisk.
 

Activity
Duration
1-2
6
1-3
10
1-4
10
2-4
0 Dummy
2-5
16
3-4
8
3-6
15
4-5
8
4-7
12
5-7
18
5-9
10
6-7 
0 Dummy
6-8
10
7-8
6
7-9
12
1-10
11
8-10
15
9-10
8

3.-  From the following network data, determine the critical path, starting and finishing times, total and free floats.
 

Activity
Description
Duration
1-2
Excavate stage 1
6
1-8
Order and deliver steelwork
15
2-3
Formwork stage 1
5
2-4
Excavate stage 2
6
3-4
Dummy
0
3-5
Concrete stage 1
6
4-6
Formwork stage 2
4
5-6
Dummy
0
5-9
Backfill stage 1
4
6-7
Concrete Stage 2
10
7-8
Dummy
0
7-9
Dummy
0
8-10
Erect steel work
8
9-10
Backfill stage 2
6

4.-  Draw a bar chart for the project of Problem 1 assuming each activity commences on its EST time. Show floats.