Edexcel D1 2002 November — Question 2

Exam BoardEdexcel
ModuleD1 (Decision Mathematics 1)
Year2002
SessionNovember
TopicCritical Path Analysis
2. The precedence table for activities involved in manufacturing a toy is shown below.
ActivityPreceding activity
\(A\)-
\(B\)-
\(C\)-
\(D\)\(A\)
\(E\)\(A\)
\(F\)\(B\)
\(G\)\(B\)
\(H\)\(C , D , E , F\)
\(I\)\(E\)
\(J\)\(E\)
\(K\)\(I\)
\(L\)\(I\)
\(M\)\(G , H , K\)
  1. Draw an activity network, using activity on arc, and exactly one dummy, to model the manufacturing process.
  2. Explain briefly why it is necessary to use a dummy in this case.
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