While validating the project schedule for a six-month product-launch initiative, the scheduler reviews Activity F (Develop training materials) in the network diagram. The forward pass shows an Early Start (ES) of day 15 and an Early Finish (EF) of day 21. The backward pass returns a Late Start (LS) of day 18 and a Late Finish (LF) of day 24. Management has asked for a realistic view of schedule flexibility so the team can reassign resources during peak workloads. Based on this information, how much total float is available for Activity F?
Total float represents how long an activity can be delayed without affecting the project completion date. It can be calculated two equivalent ways: LS − ES or LF − EF. For Activity F, LS − ES = 18 − 15 = 3 days (and LF − EF = 24 − 21 = 3 days), confirming 3 days of schedule flexibility. The other values are incorrect because they either assume no float (0 days), misinterpret the two differences as additive (6 days), or confuse latest and earliest dates (9 days).
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