| a) Early start time: - It is the earliest time by which an activity can started.
Let tij be the activity between events i and j. Let T E i is the earliest expected time of the event i then
Earliest start time is equal is to
EST = T E i
b) Earliest finish time: The earliest finish time of an activity is the time by which an activity can be finished earliest. The earliest finish time of an activity is earliest start time plus activity duration.
EFT = EST + activity duration
c) Latest finish time: The latest finish time is the time by which an activity must be finished such that completion of the project is not delayed the latest finish time of an activity between events i and j is the latest allowable event time of
LFT= T Lj |