PSP Premium Exam Questions

A logic loop occurs when a circular dependency is introduced, creating a scenario where activities cannot progress in a linear or logical manner.

Adding a relationship between F and I would create such a loop if existing dependencies between these or related activities already establish mutual dependencies.

When detailed estimates are unavailable, historical production rates can provide reliable data for estimating durations based on past projects with similar work.

Option A (Eichleay formula) is for overhead cost allocation.

Option C (Time impact analysis) evaluates delay impacts, not durations.

Option D (Black-Scholes model) is irrelevant in this context.

Historical data usage is a recognized method in project planning and scheduling practices​​.

 Estimating Activity Durations:

The critical factors are crew size, labor hours, and the standard workday.

Cost estimation is not directly required to calculate durations.

 Evaluation of Options:

Option A: Incorrect. Crew size is needed for productivity estimation.

Option B: Incorrect. Labor hours are directly tied to durations.

Option C: Incorrect. Workday hours define the available time.

Option D: Correct. Cost is not directly linked to duration

 The Late Finish (LF) for an activity in CPM is determined by adding the activity’s duration to its Late Start (LS).

 For Activity 9004, if its Late Start is known, adding the activity’s 72-day duration gives the Late Finish date.

 References: PSP Study Guide, Section 2.2.4 – Relationships and Calculations, highlights the importance of forward and backward pass calculations to determine ES, EF, LS, and LF.