Correct Answer: D
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).