Construction Planning and Management
Optimistic time, most likely time and pessimistic times for the activities of a network in the given figure are written above their arrows. If the contractual obligation time for the project is 75, the latest occurrence time for the event 2, is

20
35
25
15

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

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

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Construction Planning and Management
Earliest finish of an activity is always

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