Industrial Engineering and Production Management
The essential condition for the decompression of an activity is that

An activity could be decompressed to the maximum extent of its normal time
The project time should change due to decompression
An activity could be decompressed to the maximum extent of its normal time
After decompression the time of an activity invariably exceeds its normal time

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Industrial Engineering and Production Management
The important file in making a PERT is

An event can't be accomplished until activities leading to it are completed
No activity from any event can be started from preceding event till it is completed
Length of arrow has nothing to do with time
All of the these

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