Network & Gantt chart - unideb.hu

Network & Gantt chart Project management (lecture) 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. 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 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 bottomright. Dependent activities are always lower in the chart. The time-scaled network (AoA) 2 7

1 7 10 13 0 a c 0 15 8 b 0 1 3 10 5 15 15

d 20 4 c 25 4 free float 3 burst b 23 15 2 a 4 23 d merge

30 Dummy activities on a time-scaled AoA network 15 15 a 2 20 0 10 3 20 20 20 5 c b a b dummy c

4 25 25 Time-scaled AoN network (example 1) Re-draw the first AoA project as an AoN network: 0 0 0 0 0 0 6 7 0 7 a 6 7 0 17 0

c 13 13 10 23 START 0 0 20 0 20 FINISH 0 0 0 0 15 0 15 b 0

15 0 20 0 20 d 15 15 5 20 On AoN networks start and finish activities should be created if thereis no single starting/ending activities. 20 Translate standard AoN to a timescaled network 5 0 10 7

15 17 20 23 25 FINISH START a c b d 30 Time-scaled AoN network (example 2) Re-draw the second AoA: 5 0 0 0 15 a 0 0 5

5 15 0 20 20 START 0 0 0 25 c 0 0 0 0 20 5 20 25

0 25 FINISH 25 20 b 0 0 20 Translate it to a time-scaled network. 25 0 25 Solution 0 10 5 15 20

25 FINISH START a b c 30 Time-scaled AoN network (individual exercise) 0 2 0 0 0 0 0 0 0 2 0 10 c 2

8 10 0 a 0 2 3 2 2 START 0 0 0 5 5 b 5 5 10 7

d 5 0 3 5 5 10 13 e 10 10 0 3 0 13 0 13 FINISH 13 13

0 13 Solution 10 5 0 START FINISH c a d b 15 20 25 30 Reading Lockyer Gordon (2005): Chapter 16 Thank you for the attention