Physical Security Professional PSP Exam Dumps

 Activity Duration Estimation Techniques:

Accurate estimation methods include detailed breakdowns, using experienced personnel, and analyzing specific factors for individual activities.

Relying on gross estimates or averages (as in A) introduces significant inaccuracies.

 PSP Study Guide References:

The PSP Study Guide emphasizes the importance of detailed and specific input to improve estimation accuracy​.

 Analysis for Selection:

Option A: Incorrect method, as averages do not provide accurate results for individual activities.

Option B: Misguided suggestion; focusing independently on activities without logic paths introduces potential errors.

Option C: Correct. Dividing activities enhances detail and estimation precision.

Option D: Correct. Involving the executors ensures realistic and experienced-based durations.

 Conclusion: The correct answer is A, as using gross estimates is not an effective method for improving accuracy.

 To eliminate Activity B from the critical path, its dependencies must change so that its delay no longer impacts the path's completion time.

 Replacing the A → B relationship with a Finish-to-Finish with Offset (FFO) and adding an FSO (Finish-to-Start with Offset) relationship from A → C allows Activity C to proceed independently of Activity B.

 References: PSP Study Guide, Section 2.2.4 – Relationships and Calculations, explains how relationship types can influence critical path determination.

 Analyze the Data and Logic:

Activity 9004 ("Valve House Embankment"): This activity has a direct Finish-to-Start (FS) relationship with Activity 10002, with a lag of 7 days.

Late Start (LS) and Late Finish (LF): In backward pass calculations, the late finish of the successor activity is adjusted for lag and task duration to determine the late start of the predecessor activity.

 Formula for Late Finish (LF):

The Late Finish of Activity 9004 is derived by taking the Late Start (LS) of Activity 10002, subtracting the lag of 7 days, and subtracting 1 day to calculate the exact finish date.

 Correct Date Calculation:

Given the Late Start (LS) of Activity 10002:

LS.10002 = 11-28-03.

Apply the formula:LF.9004 = LS.10002 - Lag.7 - 1 day = 11-28-03 - 7 days - 1 day = 11-20-03.

 Cross-Verification with Answer Options:

Option A: Incorrect. Misrepresents the formula.

Option B: Incorrect. Incorrect application of logic and lag adjustments.

Option C: Incorrect. Omits the correct lag consideration.

Option D: Correct. Matches both formula and calculated date.