Edexcel D1 2008 January — Question 5

Exam BoardEdexcel
ModuleD1 (Decision Mathematics 1)
Year2008
SessionJanuary
TopicCritical Path Analysis
5. (a) Draw the activity network described in this precedence table, using activity on arc and exactly two dummies.
(4)
ActivityImmediately preceding activities
A-
B-
CA
DB
EB, C
FB, C
(b) Explain why each of the two dummies is necessary.
(3)
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