TIle computations red-flag activities Band C because their F F < T F. The remaining activities
(E, F, and G) have F F = T F, and hence may be scheduled anywhere between their earliest
start and latest completion times.
To investigate the significance of the red-flagged activities, consider activity B. Because its
T F = 5 days, this activity can start as early as time 0 or as late as time 5 (see Figure 6.45).
However, because its F F = 2 days, starting B anywhere between time 0 and time 2 will have no
effect on the succeeding activities E and F. If, however, activity B must start at time 2 + d ($5),
then the start times of the immediately succeeding activities E and F must be pushed forward
past their earliest start time (= 8) by at least d. In this manner, the precedence relationship
between B and its successors E and F is preserved.
Turning to red-flagged activity C, we note that its FF = O. This means that any delay in
starting C past its earliest start time (= 5) must be coupled with at least an equal delay in the
start of its successor activities E and F.
lORA
TIle computations red-flag activities Band C because their F F < T F. The remaining activities(E, F, and G) have F F = T F, and hence may be scheduled anywhere between their earlieststart and latest completion times.To investigate the significance of the red-flagged activities, consider activity B. Because itsT F = 5 days, this activity can start as early as time 0 or as late as time 5 (see Figure 6.45).However, because its F F = 2 days, starting B anywhere between time 0 and time 2 will have noeffect on the succeeding activities E and F. If, however, activity B must start at time 2 + d ($5),then the start times of the immediately succeeding activities E and F must be pushed forwardpast their earliest start time (= 8) by at least d. In this manner, the precedence relationshipbetween B and its successors E and F is preserved.Turning to red-flagged activity C, we note that its FF = O. This means that any delay instarting C past its earliest start time (= 5) must be coupled with at least an equal delay in thestart of its successor activities E and F.lORA
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