AACE International AACE-PSP Exam Dumps

Time-Scaled Logic Diagrams:

Represent activities with respect to a time scale (e.g., a calendar).

Show logical relationships and durations in a visually aligned manner, aiding in analysis and reporting.

Common Misconceptions:

They are not the same as pure logic diagrams (B).

While often created using computer software, manual versions are also possible, so (A) is incorrect.

They are not specifically for calculating activity durations (C).

PSP Study Guide Reference:

The guide identifies time-scaled logic diagrams as a tool for better visualization of schedules, where activities align with calendar dates.

Conclusion: The correct answer is D, as time-scaled logic diagrams are drawn to align activities with a calendar.

Driving Activity Concept:

The driving activity in a backward pass is the one that determines the late start or finish of the dependent activity.

Activity 10001 (Valve House - Complete) is directly dependent on its successor, Activity 11001 (Spillway - Concrete).

Backward Pass Logic:

In backward pass calculations, the late start of Activity 11001 establishes the late finish of Activity 10001 due to their finish-to-start (FS) relationship.

This makes Activity 11001 the driving activity.

Verification:

According to the PSP Study Guide, driving activities are identified based on their logical ties and the critical path's constraints (Ref: PSP Study Guide, Chapter 2A: Activity Relationships and Critical Path Analysis).

Thus, the driving activity for Activity 10001 is A. Activity 11001.

Understand the Concept of a Hammock Activity:

A hammock activity spans over multiple activities and reflects the cumulative duration from the earliest start to the latest finish of the grouped activities.

Activities in the Hammock (6001--6003):

Activity 6001: Duration = 102 days, FS relationship with successor.

Activity 6002: Duration = 140 days, FS with 6001.

Activity 6003: Duration = 115 days, FS with 6002.

Calculate the Duration:

Earliest Start of Activity 6001 Latest Finish of Activity 6003.

Total duration = 102 + 140 + 115 = 362 days.

Cross-Verification with Answer Options:

Option A: Incorrect. Overestimates.

Option C: Incorrect. Underestimates.

Option D: Incorrect. Underestimates.

Option B: Correct. Matches the calculated duration.