Network & Gantt chart for computerstudent.ppt

Network

1. Network & Gantt chart
Project management
(lecture)

2. Why to translate a network to a
Gantt chart?
•Gantt chart is more readily to understood by
‘unskilled’ people. It is especially useful when
presenting to the top management.
•Progress can be easily displayed on it
•Visualise floats and activity times. Effective
explanatory and teaching instrument.
•Resource allocation can be performed on it.

3. Two ways af translating networks into
bar chart
•Calculating activity times and loacting these
on the bar chart
•Drawing activities directily to a time-scale,
using the node numbers ensuring correct
relationships (time-scaled network)
–AoA type
–AoN type

4. The time-scaled network (AoA)
•Mark activities by nodes (events)
•Any dummy must be drawn in as a vertical line
with its head and tail node-labels
•Activitiy bars will fall from top-left to bottom-
right. Dependent activities are always lower in
the chart.

5. The time-scaled network (AoA)
41
3
42
0 10 15 20 25 305
a
b
c
d
burst
merge
free float
1
0
0
2
7
13
a
7
4
23
23
c
10
3
15
15
b
15
d
8

6. Dummy activities on a time-scaled
AoA network
a
15
1
0
0
2
15
20
4
25
25
3
20
20
b
20
c
5
41 32
0 10 15 20 25 305
3
2
dummy
a
b c

7. Time-scaled AoN network
(example 1)
•Re-draw the first AoA project as an AoN
network:
START
0 00
0 00
0
FINISH
20 200
20 200
0
b
0 150
0 1515
0
a
0 76
6 137
0
d
15 200
15 205
0
c
7 170
13 2310
0
•On AoN networks start and finish activities
should be created if thereis no single
starting/ending activities.

8. Translate standard AoN to a time-
scaled network
0 10 15 20 25 305
FINISH
7 17 23
START
a c
b d

9. Re-draw the second AoA:
Time-scaled AoN network (example 2)
START
0 00
0 00
0
FINISH
25 250
25 250
0
b
0 200
0 2020
0
a
0 155
5 2015
5
c
20 250
20 255
0
Translate it to a time-scaled network.

10. Solution
0 10 15 20 25 305
START
a
cb
FINISH

11. Time-scaled AoN network
(individual exercise)
START
0 00
0 00
0
e
10 130
10 133
0
d
2 73
5 105
3
c
2 100
2 108
0
b
0 55
5 105
5
a
0 20
0 22
0
FINISH
13 130
13 130
0

12. Solution
0 10 15 20 25 305
START FINISH
d
b
a c

13. Reading
•Lockyer –Gordon (2005): Chapter 16

14. Thank you for the attention