An activity has an early start of day 14 and a late start of day 18. What total float is indicated by those dates?
Correct Answer
D) 4 days
Total float can be read as late start minus early start: 18 - 14 = 4 days. Other choices subtract the wrong dates or add the dates.
Why This Is the Correct Answer
Total float can be read as late start minus early start: 18 - 14 = 4 days. Other choices subtract the wrong dates or add the dates.
Why the Other Options Are Wrong
Option A: 2 days
total float, choice a: 2 days uses the wrong side of the schedule subtraction or omits one duration component.
Option B: 3 days
total float, choice b: 3 days is wrong because 3 days uses the wrong side of the schedule subtraction or omits one duration component.
Option C: 32 days
total float, choice d: 32 days uses the wrong side of the schedule subtraction or omits one duration component.
Memory Technique
Picture a fastener row labeled total float: finish every operation before accepting 4 days.
Reference Hint
Open Construction Jobsite Management, 5th Ed.; use the index entry or section for "Critical-path scheduling" to confirm that Total float can be read as late start minus early start: 18 - 14 = 4 days.
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