Consider a balanced line, having five identical sattions in series, each consisting of a single machine

with low variability process times and an infinite buffer. Suppose the arrival rate is ra$,$ utilization of all

machines is $85\%$ and the $=1$ What happens to WIP, CT and TH if we do the following

a$)$ Decrease the arrival rate

b$)$Increase the variability of one station

c$)$Increase the capacity at one station

d$)$Decrease the capacity of all stations