Construction Planning and Management
Consider the following features/factors: 1. Projects are of the non-repetitive type 2. Time required need not be known 3. Time required is known precisely 4. Events have been established for planning 5. Emphasis is given to activities of project PERT is preferred for planning because of

1, 2 and 4
1, 2 and 5
1, 3 and 4
3, 4 and 5

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Construction Planning and Management
Earliest finish of an activity is always

Less than or equal to earliest event time of the following node
Less than earliest event time of the following node
Greater than or equal to earliest event time of the following node
Greater than earliest event time of the following node

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