1 / 34

Network models

Network models. Forward and backward pass. Project planning Network analysis I Project planning Network analysis II. Project planning Resource analysis Risk management Quality Budgets and cost control Project teams. Plan. Introduction Project planning Gantt chart and WBS

zena-boyd
Download Presentation

Network models

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Network models Forward and backward pass

  2. Project planning Network analysis I Project planning Network analysis II Project planning Resource analysis Risk management Quality Budgets and cost control Project teams Plan • Introduction • Project planning • Gantt chart and WBS • Project planning • Network analysis I • Project planning • Network analysis II

  3. Why Network Diagrams? • Splits up the decision making process into • Method/logic - the order in which tasks have to be completed • Time – estimates for the time to completion can be added to each task • Resources – these can be added and then analysis carried out

  4. Project Exercise 1

  5. Project Exercise 1

  6. Why Network Diagrams? • Splits up the decision making process into • Method/logic - the order in which tasks have to be completed • Time – estimates for the time to completion can be added to each task • Resources – these can be added and then analysis carried out

  7. Two Parts to the Analysis • Forward Pass • Calculates the Duration of the Project • Backward Pass • Calculates the slack/float for each task and shows the critical path

  8. Forward Pass In a game of rugby it is a means of cheating often missed by referees (BBC, 2005)

  9. Forward Pass • …but in project management it is used • To calculate the total duration of the Project… • For each task: • Take the earliest start time (EST) • Calculate the Earliest finish time (EFT): EFT = EST+Duration

  10. What’s in the box?

  11. Forward Pass

  12. Forward Pass

  13. Project Exercise 1

  14. Exercise 1 – Forward Pass • Carry out a forward pass on Project in Exercise 1

  15. Project Exercise 1

  16. Project Exercise 1 Dangler Dangler Dangler

  17. Start and Finish Nodes

  18. What’s in the box?

  19. Backward Pass • To calculate the float for each task? • For each task: • Take the latest start time (LST) • Calculate the latest finish time (LFT): LST = LFT-Duration

  20. Backward Pass

  21. Backward Pass

  22. Project Exercise 1

  23. Exercise 1 – Backward Pass • Carry out a backward pass on project exercise 1

  24. Ex1 - After Backward Pass

  25. What about the float? • Float = LFT-EFT • Or • Float = LST-EST

  26. What about the float? • Float represents the amount of time that the task can be delayed without affecting the outcome of the project • A task with zero float cannot be delayed and is therefore critical to the timely completion of the project

  27. What about the float? • A time optimised project will have a sequence of tasks from start to finish that have zero float • This sequence of tasks is called the critical path

  28. Project Exercise 1

  29. Exercise 1 – Critical Path • Calculate the float for each task and identify the critical path through the project

  30. Ex1 – Float

  31. Ex1 – Critical Path

  32. Questions • My Project has no critical path. What does this mean? • My programmer has broken his big toe in a skiing accident and cannot type for two weeks (he has a valid sick note). How will this affect my software delivery date?

  33. Directed Study • Find the critical path for Project Exercise 2 (see Lecture 3). • Find the critical path for the large project in Exercise 3.

  34. Project planning Network analysis I Project planning Network analysis II Project planning Resource analysis Risk management Quality Budgets and cost control Project teams Plan • Introduction • Project planning • Gantt chart and WBS • Project planning • Network analysis I • Project planning • Network analysis II • Project planning • Resource analysis • Risk management • Quality • Budgets and cost control • Project teams

More Related