Correct Answer - Option 4 : None
Concept:
In the case of project management the followings are the definition of various terms:
Duration (D): Duration is the estimated or actual time required to complete a task or an activity.
Earliest start time (EST): It is defined as the earliest possible time at which an activity can start. It is calculated by moving from the first to the last event in a network diagram.
Earliest finish time (EFT): It is the earliest possible time at which an activity can finish.
Relationship between earliest start time, earliest finish time, and duration is given by,
- Earliest finish time = Earliest start time + duration of that activity
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∴ EFT = EST + D
Latest start time (LST): It is defined as the latest time an activity can start and still allow the project to be completed on estimated project completion time.
Latest finish time (LFT): It is the latest possible time at which an activity can finish and still allow the project to be completed on the estimated project completion time.
Relationship between latest start time, latest finish time and duration is given by,
- Latest finish time = Latest start time + duration of that activity
- ∴ LFT = LST + D