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Project Management Lecture Network Analysis Introduction Project planning Gantt chart and WBS Project planning Network analysis I Project planning Network.

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Presentation on theme: "Project Management Lecture Network Analysis Introduction Project planning Gantt chart and WBS Project planning Network analysis I Project planning Network."— Presentation transcript:

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2 Project Management Lecture Network Analysis

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

4 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

5 Project Exercise 1

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7 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

8 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

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

10 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

11 Whats in the box? Earliest Start Estimated Duration Earliest Finish Activity Number Activity Description Latest Start Float Latest Finish Earliest Start Estimated Duration Earliest Finish Activity Number Activity Description Latest Start Float Latest Finish Earliest Start Estimated Duration Earliest Finish Activity Number Activity Description Latest Start Float Latest Finish

12 Forward Pass

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14 Project Exercise 1

15 Exercise 1 – Forward Pass Carry out a forward pass on Project in Exercise 1

16 Project Exercise 1

17 Dangler

18 Start and Finish Nodes

19 Whats in the box? Earliest Start Estimated Duration Earliest Finish Activity Number Activity Description Latest Start Float Latest Finish Earliest Start Estimated Duration Earliest Finish Activity Number Activity Description Latest Start Float Latest Finish Earliest Start Estimated Duration Earliest Finish Activity Number Activity Description Latest Start Float Latest Finish

20 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

21 Backward Pass

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23 Project Exercise 1

24 Exercise 1 – Backward Pass Carry out a backward pass on project exercise 1

25 Ex1 - After Backward Pass

26 What about the float? Float = LFT-EFT Or Float = LST-EST

27 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

28 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

29 Project Exercise 1

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

31 Ex1 – Float

32 Ex1 – Critical Path

33 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?

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

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

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