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Estimate the Activity Durations
The total labor cost for emergency bridge rehabilitation on an interstate highway is $5,716,440. The average crew-hour cost is $15,879 for this nonstop project. The number of work days the roadway was shut down is most nearly:
Solution: Assigning duration of actives is the estimated or actual time that it will be required to complete it. Accordingly:
Total labor cost ÷ crew-hour cost = total crew-hours
$5,716,440 ÷ $15,879 = 360 crew-hours
Nonstop project constitutes work at 24-hr 7-days/week
Total crew hours ÷ 24-hrs/day = project days
360 crew-hour ÷ 24-hrs/day = 15 days
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