D1 January 2010 Q6

EdexcelOld spec15 marksCritical Path Analysis

6.

Figure 5: activity network. A(3) 1 to 2; B(5) 1 to 3; dummy 2 to 3; C(4) 2 to 4; D(2) 2 to 5; E(3) 3 to 5; dummy 4 to 5; F(5) 4 to 6; G(6) 5 to 6; H(2) 6 to 7
Figure 5

Figure 5 is the activity network relating to a building project.  The number in brackets on each arc gives the time taken, in days, to complete the activity.

(a) Explain the significance of the dotted line from event 2 to event 3. (2)
(b) Complete the precedence table in the answer booklet. (3)
(c) Calculate the early time and the late time for each event, showing them on the diagram in the answer booklet. (4)
(d) Determine the critical activities and the length of the critical path. (2)
(e) On the grid in the answer booklet, draw a cascade (Gantt) chart for the project. (4)
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