Total Float of a CPM Activity
EasyCPMfloat
A project has activities A (3 days), B (5 days, after A), C (4 days, after A) and D (2 days, after both B and C). The total float of activity C is:
- A0 days
- B2 days
- C4 days
- D1 day
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Answer: D. 1 day
Equation: total float = (length of the critical path) − (length of the longest path through the activity). Values: durations A 3, B 5, C 4, D 2 days. Step 1: path A–B–D = 3 + 5 + 2 = 10 days (critical). Step 2: path A–C–D = 3 + 4 + 2 = 9 days. Step 3: float of C = 10 − 9 = 1 day. 0 treats C as critical; 2 and 4 are durations, not float.
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