Project Management

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Project Management

• LectureNetwork Analysis

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Plan

• 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

• Project planning
• Resource analysis
• Risk management
• Quality
• Budgets and cost control
• Project teams

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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

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Project Exercise 1
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Project Exercise 1
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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

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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

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

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Whats in the box?
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Forward Pass
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Forward Pass
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Project Exercise 1
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Exercise 1 Forward Pass

• Carry out a forward pass on Project in Exercise 1

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Project Exercise 1
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Project Exercise 1
Dangler
Dangler
Dangler
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Start and Finish Nodes
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Whats in the box?
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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

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Backward Pass
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Backward Pass
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Project Exercise 1
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Exercise 1 Backward Pass

• Carry out a backward pass on project exercise 1

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Ex1 - After Backward Pass
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What about the float?

• Float LFT-EFT
• Or
• Float LST-EST

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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

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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

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Project Exercise 1
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Exercise 1 Critical Path

• Calculate the float for each task and identify
  the critical path through the project

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Ex1 Float
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Ex1 Critical Path
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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?

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Directed Study

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

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Plan

• 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

• 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

35
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