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Unit 12: Critical Path Method and PERT
2. Looping error should not be formed in a network, as it represents performance of activities Notes
repeatedly in a cyclic manner, as shown below in Figure 12.7.
Figure 12.7: Looping Error
3
1 2
Incorrect
3. In a network, there should be only one start event and one ending event as shown below,
in Figure 12.8.
Figure 12.8: Only One Start and End Event
2
Start event 1 4 End event
3
4. The direction of arrows should flow from left to right avoiding mixing of direction as
shown in Figure 12.9.
Figure 12.9: Wrong Direction of Arrows
4
1 2 3 6 7
5
Incorrect
Self Assessment
Give one word for the following:
1. The shortest time taken to complete an activity.
2. The technique in which the time estimates are assumed to be known with certainty.
3. An imaginary activity that does not consume any resource and time
4. Activities that must be used only if it is necessary to reduce the complexity of the network.
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