PSP Exam Dumps - Planning & Scheduling Professional (PSP) Exam

ï‚· Activity Details (2001 - "River Diversion Stage 1"):

Successor: 2002 ("River Diversion Stage 2").

Relationship: Finish-to-Start (FS) with no lag.

Normal schedule duration for Activity 2001 = 92 days.

ï‚· Backward Pass Calculation for Late Finish (LF):

The Late Finish (LF) of Activity 2001 is derived from the Late Start (LS) of its successor, Activity 2002.

Formula: LF.2001 = LS.2002 - 1 day.

ï‚· Date Calculation:

Given: LS.2002 = 08-30-01 (as per data in the schedule).

LF.2001 = LS.2002 - 1 day = 08-30-01 - 1 day = 08-29-01.

ï‚· Cross-Verification with Answer Options:

Option A: Incorrect. Misrepresents the Late Finish formula.

Option C: Incorrect. Adds 1 day instead of subtracting.

Option D: Incorrect. Incorrect date application.

Option B: Correct. Matches both formula and calculation.

Retaining existing logic means preserving the original relationships and dependencies defined in the schedule. Even if progress is recorded out of sequence, calculations adhere to the pre-established logic unless explicitly changed.

Option B reflects adjustments for out-of-sequence progress but contradicts the original logic requirement.

Option C imposes restrictions that do not align with typical CPM calculations.

Option D is incorrect as the concept exists​​.

The PSP Study Guide discusses the importance of maintaining logic integrity in CPM scheduling​.

Given Data

Start Date: April 1, 2002.

Duration of Activity 7001 (Normal Schedule): 48 days.

Workweek: 5-day workweek (Monday to Friday).

No holidays are mentioned in the problem.

Step 1: Calculate Total Working Days

Using a 5-day workweek:

Determine the number of full weeks in 48 days:48÷5=9 weeks with 3 additional workdays.48 \div 5 = 9 \, \text{weeks with 3 additional workdays.}48÷5=9weeks with 3 additional workdays.

Total work period = 9 weeks + 3 workdays = 45 weekdays.

Step 2: Calculate Calendar End Date

Starting from April 1, 2002 (Monday):

Add 9 full weeks: April 1 + 9 weeks = May 31, 2002 (Friday).

Add the remaining 3 workdays:

Monday, June 3.

Tuesday, June 4.

Wednesday, June 5, 2002.

Step 3: Validate Answer

The finish date for Activity 7001 is June 5, 2002.

An earned value management (EVM) system can base its calculations on labor hours or monetary values, depending on the nature of the project. Both methods are valid for tracking performance and forecasting outcomes.

Option B (direct or indirect cost) does not align with EVM's focus on performance metrics.

Option C confuses timeframes with budgeting principles.

Option D (linear feet or dollars) applies to physical progress tracking but not directly to EVM systems.

This is consistent with EVM principles as outlined in project control methodologies within the PSP materials​.

ï‚· Preventing Structural Steel Delays:

Incorporating realistic timeframes for shop drawing review and resubmittals in the baseline schedule prevents design-related delays.

ï‚· Evaluation of Other Options:

A: Adding time buffers does not address the root cause.

C: Concurrent review may create confusion and errors.

D: Switching to post-tensioned concrete is a significant design change, not a practical solution for a scheduling issue.

ï‚· Verification with PSP Guidelines:

Adequate review time aligns with PSP scheduling best practices (Ref: PSP Study Guide, Chapter 2B: Schedule Development and Baseline Creation).

ï‚· Critical Path and Delays:

A delay must impact the critical path to qualify for a time extension or compensable delay, as the critical path determines the project's overall completion time.

If the critical path is not affected, the delay is considered to have "float," which means it does not affect the project's completion date and, therefore, may not be compensable.

ï‚· PSP Study Guide References:

Delays impacting the critical path are emphasized in the PSP Study Guide under schedule analysis and delay management sections. The claimant must demonstrate that the delay impacts key project milestones and overall project completion​.

ï‚· Analysis for Selection:

Option A: Correct. A delay that does not affect the critical path does not result in additional time or compensation.

Option B: Concurrent delays involve shared responsibility and may complicate claims for compensation but are not a strict requirement for delay consideration.

Option C: Monetary harm is not directly relevant to time extension entitlement.

Option D: While planned schedules are significant, the focus is on the project's critical path, not just the contractor's planned sequence.

ï‚· Conclusion: The correct answer is A because affecting the critical path is the key determinant for entitlement to a time extension or compensable delay.

ï‚· The change order impacts Activity 6001 by increasing its duration and workload. As per Critical Path Method (CPM) principles, this would also affect predecessor activities like 1000, which directly influence the start of 6001.

 Updates to the schedule will ripple through linked activities, but only those immediately affected by the change—1000 and 6001—would be revised in the immediate update.

 References: PSP Study Guide, Section 2.3.4 – Schedule Change Management, and Appendix A – Sample Problems on CPM Network adjustments highlight how scope changes propagate through linked activities.