A project schedule shows Activity A (4 days) must finish before Activity B (6 days) can start, and Activity B must finish before Activity C (3 days) can start. If Activity A starts on Day 1, what is the earliest finish date for Activity C?
Correct Answer
D) Day 13
Activity A: Days 1-4, Activity B: Days 5-10, Activity C: Days 11-13. Activity C finishes on Day 13, making it the earliest finish date for the sequence.
Why This Is the Correct Answer
This is a sequential scheduling problem where activities must be completed in order with finish-to-start relationships. Activity A runs from Day 1-4 (4 days), Activity B starts immediately after A finishes and runs from Day 5-10 (6 days), and Activity C starts immediately after B finishes and runs from Day 11-13 (3 days). The earliest finish date for Activity C is therefore Day 13.
Why the Other Options Are Wrong
Option B: Day 10
Day 14 would be incorrect because it adds an extra day beyond the required sequence. This might result from incorrectly counting days or adding unnecessary buffer time between activities.
Option C: Day 14
Day 12 falls one day short of the actual finish date. This error typically occurs from miscounting the days in one of the activities or incorrectly calculating the start/finish relationships.
Memory Technique
Use the acronym 'ADD' - Always Draw Diagrams for scheduling problems, and remember that finish-to-start means the next activity starts the day AFTER the previous one finishes.
Reference Hint
Project Management chapter covering Critical Path Method (CPM) and activity scheduling relationships
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