Consider a balanced line, having O?ve identical stations in series, each con- sisting of a single machine with variability of process times c2s = 0:75: Suppose the arrival rate is A = 10 units per hour, utilization of all ma- chines is 85 percent, and the arrival rate follows a Poisson distribution.
(a) Calculate the average WIP
(b) What happens to WIP if we increase the variability of one station?