PK0-004 · Question #862
Task A has a duration of 2 days and is a predecessor of task B, which has a duration of 3 days and is a predecessor of task C. Task C has a duration of 4 days. Task D has a start-to-start…
The correct answer is A. -9 days. The question asks to calculate the lead time for Task D based on its duration and a start-to-start dependency with Task A, such that both tasks conclude simultaneously.
Question
Options
- A-9 days
- B-2 days
- C0 days
- D2 days
- E9 days
How the community answered
(36 responses)- A61% (22)
- B3% (1)
- C11% (4)
- D6% (2)
- E19% (7)
Why each option
The question asks to calculate the lead time for Task D based on its duration and a start-to-start dependency with Task A, such that both tasks conclude simultaneously.
To have Task D finish at the same time as Task A, given Task A's duration of 2 days and Task D's duration of 11 days, Task D must start 9 days earlier than Task A. This is calculated as (Task A duration) - (Task D duration) = 2 - 11 = -9 days lag (lead time).
A -2 day lag would mean Task D starts 2 days before Task A, resulting in Task D finishing on day 9, not aligning with Task A's finish.
A 0 day lag means Task D starts at the same time as Task A, causing Task D to finish 9 days after Task A.
A 2 day lag means Task D starts 2 days after Task A, further extending Task D's finish beyond Task A's.
A 9 day lag means Task D starts 9 days after Task A, which would significantly delay Task D's completion relative to Task A.
Concept tested: Project scheduling, lead/lag calculation
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