ITPEC FE Morning October 2021 Question 53
In project time management, which of the following is the amount of time that the start of a successor activity requires to be delayed after the finish of a predecessor activity?
Explanation
Lag — a required delay between the finish of a predecessor and the start of its successor.
In a finish-to-start dependency with a lag of n days, the successor may start only n days after the predecessor finishes: concrete must cure for three days before the formwork is removed, for example. A lead is the reverse: the successor starts before the predecessor finishes, overlapping it.
Answer (b)
Why not others:
- •(a) Free float — how long an activity can slip without delaying the earliest start of any successor; slack the activity has, not a delay imposed on the link.
- •(c) Lead — lets the successor start early, overlapping the predecessor, the opposite of a delay.
- •(d) Total float — how long an activity can slip without delaying the project's end date.
Key rule: Lag and lead belong to a dependency (a forced wait or an allowed overlap); free and total float are slack that an activity has, computed from the network.
Project Management · AI-written, may contain errors
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