difference between cpm & pert

CPM PERTCPM is used for repetitive job like building a house

PERT is used for non-repetitive jobs like planning the assembly of the space.

It is a deterministic model. it is a probabilistic model.

It is activity-oriented as the result or calculations are considered in terms of activities or operations of the project.

It is event-oriented as the results of analysis areexpressed in terms of events or distinct points in time indicative of progress.

It is applied mainly for construction and businessproblems.

It is applied mainly for planning and schedulingresearch programmes.

CPM does not incorporate statistical analysis indetermining time estimates, because time is precise and known.

PERT incorporates statistical analysis and therebydetermines the probabilities concerning the time bywhich each activity or entire project would becompleted.

It is difficult to use CPM as a control device for thesimple reason that one must repeat the entireevaluation of the project each time the changes areintroduced into the network.

PERT serves as useful control device as it assistsmanagement in controlling a project by calling attention to such delays