Determine the number of production runs and also the total incremental cost in a factory for the data given below:

The most commonly used criteria for measuring forecast error is

A dummy activity is used in $$PERT$$ network to describe

People arrive at a hotel in a Poisson distributed arrival rate of $$8$$ per hour. Service time distribution is closely approximated by the negative exponential. The average service time is $$5$$ minutes. Calculate (a) the mean number in the waiting line; (b) the mean number in the system; (c) the waiting time in the queue; (d) the mean time in the system, and (e) the utilization factor.