CPM.:
1. CPM is activity oriented i.e., CPM network is built on the basis of activities.
2. CPM is a deterministic model. It does not take into account in uncertainties involved in the estimation of time.
3.CPM places dual emphasis on project time as well as cost and finds the trade off. between project time and project cost.
4. CPM is primarily used for projects which are repetitive in nature and comparatively small in size.
PERT
1.PERT is event oriented.
2.PERT is a probabilitic model.
3.PERT is primarily concerned with time only.
4. PERT is used for large one time reserach and development type of projects.
Distinguish between Resource smoothing and Resource levelling.
The resource allocation procedure mainly consists of two activities:
(z) Resource smoothing
(ii) Resource levelling.
Resource smoothing If the project duration could not be changed then the
resource allocation only smoothen the demand on resources in order that the demand
for any resource is uniform as possible The periods of maximum demand for resource
are located and the activities are accordmg to their float values are shifted for balancing
the availability and requirement of resources. The intelligent utilization of floats can
smoothen the demand of resources to the maximum possible extent is called resource
smoothing.
Resource Levelling : There are various activities in a project demanding varying
levels of resources.
The demand on certain specified resources should not go beyond the prescribed
level is know as resource levelling.
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