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

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Construction Planning and Management
Total float for any activity is defined as the difference between

Its latest start time and earliest start time
Its latest start time and earliest finish time
Its latest finish time and earliest start time for its successor activity
Its earliest finish time and earliest start time for its successor activity

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Construction Planning and Management
Crash project duration is obtained by summing the

Crash durations for all the activities along the critical path obtained by taking into account the normal duration for all the activities
Crash durations for all the activities along the critical path obtained by taking into account the crash duration for all the activities
Crash durations for all activities
Normal durations for all the activities

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