CMA Final · Strategic Cost Management · Network Analysis - PERT, CPM
In a project network, activity D has an earliest start time of day 8, a duration of 5 days and a latest finish time of day 20. What is the total float of activity D?
The total float is 7 days. It is the latest finish time minus the earliest start time minus the duration, so 20 − 8 − 5 equals 7. Subtracting only the start time would give 12 and would ignore the time the activity itself uses.
- A12 days
- B3 days
- C15 days
- D7 daysCorrect
Explanation
Total float = latest finish − earliest start − duration = 20 − 8 − 5 = 7 days. Using 12 days ignores the activity duration. Using 3 days wrongly mixes the earliest finish (13) with other figures instead of computing 20 − 13 = 7.
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