Dummy Activities (Edexcel A-Level Further Mathematics): Flashcards
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Practise the cards
10 cards from this deck
Dummy activity definition
Dummy activity definition
Task with zero duration, no resources, shows dependencies
Duration of dummy activity
Duration of dummy activity
Zero
Visual representation of dummy
Visual representation of dummy
Dashed arrow
Purpose of dummy activities
Purpose of dummy activities
Show dependencies and prevent ambiguity in activity networks
When is dummy required
When is dummy required
When activities share start/end nodes but have different predecessors
Problem dummies prevent
Problem dummies prevent
Ambiguity from identical start and end nodes
Common mistake: omitting dummies
Common mistake: omitting dummies
Leads to ambiguous or incorrect networks
Misinterpreting dummies as
Misinterpreting dummies as
Real tasks with duration or resources
Redundant dummies mistake
Redundant dummies mistake
Adding unnecessary dummies that don't resolve ambiguity
Dummies and precedence tables
Dummies and precedence tables
Ensure network matches precedence table exactly