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.
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Chosen Answer:
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