UGM June 2019 Q23
Read the following regarding PERT and CPM:
(a) PERT is probabilistic in nature and CPM is deterministic in nature.
(b) PERT is most suitable for new as well as old projects but CPM is of great value for projects that are repetitive.
(c) PERT focuses primarily on time element and attaches lesser significance to the cost. On the contrary, the CPM puts a strong emphasis on cost.
(d) PERT is activity-oriented and CPM is event-oriented.
- Option : D
- Explanation : CPM and PERT: The following facts help to distinguish CPM and PERT calculations.
(i) In CPM the time of an activity is deterministic. But in PERT the time for each activity is probabilistic.
(ii) In CPM we find the minimum time required to complete the project without considering the cost involved. But in PERT the cost involved in each activity is also taken into account. The normal time required for each activity can be crashed to the least time required at an increased cost. We crash the activities in a systematic way and find the least possible time to complete the project at an optimum cost.
(iii) In CPM, the time calculations are activity-oriented. But in PERT each node represents an event and the calculations are based on these events.
(iv) In CPM the time of completion of the project is of deterministic nature whereas in PERT we can find only the probability of completion of the project within a stipulated time.
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