 Understanding the Problem Context:

Activity C is currently set to complete on Day 40.

Activity A has a 5-day delay in starting, so adjustments are needed to maintain the Day 40 completion date for Activity C.

The key is to identify which adjustment will fail to maintain the timeline.

 Option-by-Option Analysis:

A. Reduce the duration of 'A' from 20 days to 10 days and replace the relationship from 'B' to 'C' with FSO (Finish-to-Start with Offset):

Reducing Activity A’s duration from 20 to 10 days might mitigate part of the delay, but replacing the relationship between B and C with FSO introduces an offset.

FSO relationships typically delay the start of successor activities (Activity C in this case).

This would likely push Activity C beyond Day 40 because the delay in B's finish, coupled with the offset, would result in C starting later.

This adjustment does NOT maintain the completion date of Activity C.

B. Replace the relationship from 'B' to 'C' with SSO (Start-to-Start with Offset):

An SSO relationship allows Activity C to begin once Activity B starts (with or without an offset).

This adjustment effectively overlaps the schedules of B and C, mitigating delays from A.

This adjustment can maintain the completion date of Activity C at Day 40.

C. Reduce the duration of 'B' from 10 days to 5 days by compressing work effort:

Reducing B’s duration by compressing its schedule shortens its timeline, allowing Activity C to start sooner.

This adjustment offsets the delay caused by Activity A.

This adjustment can maintain the completion date of Activity C at Day 40.

 Final Answer and Justification:

The adjustment described in A will NOT maintain the completion date of Activity C at Day 40 because the FSO relationship introduces delays, making it ineffective in this scenario.

Options B and C offer feasible adjustments to maintain the timeline.

 Study Guide Reference:

Refer to the PSP Certification Study Guide, Chapter 2 – Scheduling, Subchapter 2.2.4: Relationships (p. 151-157), which details the impact of logical relationships (FSO, SSO) on schedule timelines.

Additionally, review AACE Recommended Practice 52R-06: Time Impact Analysis for insights into how delays affect dependent activities and methods for mitigating them.