1. A hair salon has five stylists’ chairs and four stylists. The customer arrivals average 6 per hour, and the service times average 30 minutes. The coefficients of variation of the inter-arrival times and the service times are both equal to 1.
a. Determine the utilization of the four stylists, the average number of customers in the salon, the average number of customers waiting to be served, and the average customer waiting time.
b. How will the addition of another stylist affect the statistics in part (a)?
c. Two of the four stylists wish to take their vacations during the same week. What effect will this have?