It is possible now to estimate the probability that a node j in the network will
occur by a prespecified scheduled time, Sj' Let ej be the earliest occurrence time of
node j. Because the durations of the activities leading from the start node to node j are
random variables, ej also must be a random variable. Assuming that all the activities in
the network are statistically independent, we can determine the mean, E{ej}, and variance,
var{ ej}, in the following manner. If there is only one path from the start node to
node j
It is possible now to estimate the probability that a node j in the network will
occur by a prespecified scheduled time, Sj' Let ej be the earliest occurrence time of
node j. Because the durations of the activities leading from the start node to node j are
random variables, ej also must be a random variable. Assuming that all the activities in
the network are statistically independent, we can determine the mean, E{ej}, and variance,
var{ ej}, in the following manner. If there is only one path from the start node to
node j
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