Critical Paths (AQA A-Level Further Maths): Flashcards

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Critical Paths
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Definition of float

Spare time available for an activity

Formula for calculating float

(Latest finishEarliest start)Duration(\text{Latest finish} - \text{Earliest start}) - \text{Duration}

Definition of critical activity

Activity with zero float

Definition of critical path

Sequence of critical activities from start to end of project

What the critical path determines

Minimum project duration

Can a project have multiple critical paths?

Yes, more than one is possible

How to reduce time with multiple critical paths

Shorten activities on ALL critical paths simultaneously

Purpose of forward pass

Calculate earliest start times for each activity

Purpose of backward pass

Calculate latest finish times for each activity

How to identify critical activities

Calculate float; activities with zero float are critical

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