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Network & Gantt chart

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

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Network & Gantt chart

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  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. 10 20 15 0 25 30 5 1 2 4 4 3 The time-scaled network (AoA) 7 2 10 7 13 c a 0 23 1 4 15 8 0 23 b 15 d 3 15 a c free float b d burst merge

  6. Dummy activities on a time-scaled AoA network 15 2 20 0 3 4 20 25 20 1 10 20 15 0 25 5 30 15 5 a b 3 1 4 2 c 20 25 0 3 a 2 c b dummy

  7. 0 0 0 0 0 0 START a d FINISH c b 20 15 7 0 0 0 6 0 0 0 0 0 20 0 20 15 7 17 5 0 7 10 0 15 20 0 6 0 13 15 15 13 20 0 20 23 Time-scaled AoN network (example 1) • Re-draw the first AoA project as an AoN network: • 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 10 17 20 23 15 25 30 5 0 7 FINISH START a c b d

  9. Time-scaled AoN network (example 2) 0 0 5 0 0 START a b c FINISH 25 20 0 0 0 0 5 0 0 0 25 0 25 15 20 20 0 15 0 5 20 0 0 25 5 20 20 25 0 25 Re-draw the second AoA: Translate it to a time-scaled network.

  10. Solution 10 20 15 25 30 5 0 FINISH START a c b

  11. 0 0 0 5 0 0 3 e c a START FINISH b d 10 13 0 2 0 0 2 5 0 0 0 0 3 0 13 5 7 2 13 10 0 5 5 3 8 0 2 0 0 13 5 5 10 0 2 0 13 10 2 10 13 10 Time-scaled AoN network(individual exercise)

  12. 10 20 15 25 30 5 0 START FINISH Solution c a d b

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

  14. Thank you for the attention

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