PSP Questions Bank

Activity Details (9001 - "Spillway - Concrete"):

Duration: 175 days in the Normal schedule.

To calculate Late Start (LS), the Late Finish (LF) is required. LS is calculated by subtracting the activity's duration from the LF.

Formula for Late Start (LS):LS = LF.9001 - Dur.9001.

Date Calculation:

Late Finish (LF.9001) = 11-20-02 (given or derived).

Apply the formula:LS.9001 = LF.9001 - Dur.9001= 11-20-02 - 175 days.

Cross-Verification of Dates:

After subtracting 175 days, LS.9001 = 11-20-02.

Cross-Verification with Answer Options:

Option A: Incorrect. EF (Early Finish) is not needed for this calculation.

Option B: Incorrect. Uses LS and Dur incorrectly without connecting to LF.

Option C: Incorrect. Data provided is sufficient.

Option D: Correct. Matches both the formula and the date calculation.

 Activity 2002 in the Crashed Schedule:

Activity 2002 duration in the crashed schedule is 28 days.

Start Date: 12 August 2021.

Finish Date = Start Date + Duration (excluding non-working days).

 Calculation:

12 August + 28 days = 09 September 2021 (excluding weekends or non-working days based on typical calendars).

 Verification with PSP Guidelines:

Accurate calculation of start and finish dates aligns with scheduling best practices (Ref: PSP Study Guide, Chapter 2A: Schedule Development).