Project management (seminar) Network & Gantt chart Project management (seminar)

Why 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. To visualise floats and activity times. Effective explanatory and teaching instrument. Resource allocation can be performed on it.

Two ways of translating networks into bar chart Calculating activity times and locating these on the bar chart. Drawing activities directly 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 Activity bars will fall from top-left to bottom-right. Dependent activities are always lower in the chart.

The time-scaled network (AoA) 1 2 7 13 a 4 23 c 10 3 15 b d 8 4 1 3 2 10 15 20 25 30 5 a b c d burst merge free float

Dummy activities on a time-scaled AoA network 15 1 2 20 4 25 3 b c 5 4 1 3 2 10 15 20 25 30 5 dummy a b c

Time-scaled AoN network (example 1) Re-draw the first AoA project as an AoN network: a 7 6 13 c 7 17 13 23 10 START FINISH 20 b 15 d 15 20 5 On AoN networks start and finish activities should be created if there are no single starting/ending activities.

Translate standard AoN to a time-scaled network 5 7 10 15 17 20 23 25 30 START FINISH a c b d

Time-scaled AoN network (example 2) Re-draw the second AoA: START FINISH 25 b 20 a 15 5 c Translate it to a time-scaled network.

Solution 5 10 15 20 25 30 START FINISH a b c

Time-scaled AoN network (individual exercise) 2 10 8 a 2 START e 10 13 3 FINISH 13 d 2 7 3 5 10 b 5 10

Solution 5 10 13 15 20 25 30 START FINISH a c d b e

Reading Lockyer – Gordon (2005): Chapter 16

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