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  3. PEARSON (PEARSON)
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  5. Business
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  7. Unit 3 - Business decisions and strategy

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Summary Critical Path Analysis
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Describes what a critical path analysis is, what a manager needs to know to use the technique, features of a critical path, key points of a critical path, and the advantages and disadvantages of it.

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  • September 28, 2020
  • 2
  • 2019/2020
  • Summary

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Theme 3 Topic 9
Critical Path Analysis
Critical Path Analysis
Critical Path Analysis – using a network diagram to show
the tasks taken to complete a project in the minimum time
possible

 Shows the sequence of activities required for the
project and the order in which they can be
completed
 Its purpose is to plan projects in a way which
enables a project to be completed in the shortest
time possible

To Use the Technique a Manager Needs to Know:

 What different tasks are involved
 The length of time each task is expected to take
 The order the tasks must be completed in – some can’t be started until another has finished

Features of a Critical Path Analysis:

Feature Explanation
Nodes and Node  The circles represent a point in time at the start or end of an activity
Numbers  Nodes are split into three
 The left half of the node contains the number of the node – provides a unique
identity for each node
Earliest Start  The right half of the node is split in two
Time (EST)  The top segment shows the EST that an activity can commence
 Depends on the completion of the previous activity
 For the starting activity, the EST is always zero
Latest Finishing  The bottom segment shows the LFT
Time (LFT)  The latest time an activity can finish without delaying the overall project
Arrows  Represent production activities, they must go left to right and begin and end
with a node
 Below the line – a number which represents the length of time it takes to
complete that activity
 Above the line – a letter or description of the activity that the line represents
The Critical Path  Critical Path – the sequence of activities in a project that must be completed
within a designated time in order to prevent any delay in overall completion of
the project
 Is shown by the symbol // over the arrow
Total Float  Total Float – the amount of time that an activity can be delayed by without
delaying the entire project
 Total Float for an Activity = LFT – Duration of Activity – EST

Key Points of a Critical Path Analysis:

 Must start and end on a single node
 No lines should cross each other
 There is no limit on the number of activities that link to a single node
 When drawing an activity, do not add the end node until you have looked to see which activity follows
 It is helpful to draw networks with large circles and short lines – able to write figures in the nodes

Advantages of Critical Path Analysis Disadvantages of Critical Path Analysis

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