Enhance Your Career With Available Preparation Guide for AACE-PSP Exam [Q17-Q33]

The linear scheduling velocity diagram uses time on one axis and location on the other. This graphically represents the progression of work at various locations over time.
Option C (time and rate of progress) and Option D (time and crew size) refer to related concepts but do not accurately describe the axes.
Option A (location and crew size) is unrelated.
This aligns with graphical techniques discussed for construction scheduling​.

* Late Finish (LF) Transition Rule:
Late finish (LF) is calculated by adding one day to the early finish (EF) of the final activity.
EF of Activity 11001 is given, and the late finish is simply EF+1EF + 1EF+1.
* Cross-Verification with PSP Guidelines:
PSP methodologies state that late finish is derived from the forward pass using early finish logic, with specific adjustments based on activity relationships (Ref: PSP Study Guide, Chapter 2A: Forward and Backward Pass Calculations).

* Activity 11001 Characteristics:
Activity 11001 (Spillway – Concrete) is logically defined as the final activity in the project.
Final activities in a project typically do not have successor activities since they signify project completion.
* Exclusion of Other Options:
Option A: Circular logic does not apply since the scheduling logic is linear and follows standard precedence diagramming methods.
Option B: Activity 11001 is not penultimate but the final activity.
Option C: The scheduler’s error is highly unlikely in a controlled environment following PSP principles.
* Verification with PSP Guidelines:
The PSP Study Guide explains that final activities represent the culmination of a project’s logical sequence and typically lack successors (Ref: PSP Study Guide, Chapter 2A: Logical Sequencing).

* Precedence Diagramming Method (PDM):
PDM allows for Start-to-Start (SS), Finish-to-Start (FS), Start-to-Finish (SF), and Finish-to-Finish (FF) relationships between activities.
This flexibility makes PDM distinct from Arrow Diagramming Method (ADM), which uses arrows to depict dependencies.
* Evaluation of Options:
Option A: Incorrect. This describes ADM, not PDM.
Option B: Incorrect. Both PDM and ADM can represent multiple critical paths.
Option C: Incorrect. Late start and finish calculations apply to both methods.
Option D: Correct. PDM uniquely allows multiple relationship types.

Activity Overview and Dependencies:
From the provided schedule data, Activity 3001 (Excavation, Dam Site) starts with multiple logical relationships:
Successor activities include SS (Start-to-Start) and FS (Finish-to-Start) dependencies with other tasks.
Specifically, these relationships link 3001 to 4001 (Excavation, Spillway) and 5001 (Drill and Grout, Dam Site).
Normal Schedule Context:
Excluding Activity 1000, we focus on Activity 3001’s logical relationships to determine which activities are concurrent.
In the “Normal Schedule”, Activity 3001 has a duration of 152 days and overlaps with Activities 4001 (152 days) and 5001 (102 days). Both activities share similar dependencies and durations with Activity 3001, making them concurrent.
Schedule Dependency Analysis:
Concurrent activities are identified by overlapping durations and logical relationships that align their schedules.
Activity 4001 is linked via SS and FF dependencies, ensuring simultaneous start and finish points.
Activity 5001 starts as 3001 progresses (SS and FS dependencies).
Final Answer Validation:
Other listed activities, such as 2003 and 7001 (Answer A) or 2004 (Answer B), are not logically or temporally concurrent based on their dependencies and durations.
Only 4001 and 5001 have concurrent schedules aligning with Activity 3001.
Study Guide Reference:
Planning and Scheduling Professional Certification Study Guide, Chapter 2 – Scheduling, sections on “Dependencies and Constraints” (p. 157) and “Sequencing Activities” (p. 151).
For further insights into identifying concurrency using logical relationships, refer to AACE’s Recommended Practice 10S-90: Cost Engineering Terminology.
This structured approach ensures alignment with PSP standards and principles in evaluating concurrent activities in complex schedules.