* Impact of Changing Activity E's Duration:
* Activity E's new duration = 4 months.
* The critical path passes through Activities A # C # D # E # H # I.
* Recalculate Project Duration:
* Original duration with E = 3 months: 19 months.
* Increasing E to 4 months does not impact the overall path since it remains within the critical path's time allowance.
* Overall project duration remains 19 months.
* Cross-Verification:
* Option B: Incorrect. Assumes additional delays.
* Option C: Incorrect. Overestimates delays.
* Option D: Incorrect. Miscalculates path changes.
* Option A: Correct. Matches revised critical path duration.
References:
* PSP Study Guide (2019), Sections on Critical Path and Float Calculations.
* AACE Recommended Practices, RP 10S-90.