Given customers expectations , the banks manager believe that it is unacceptable for a customer to wait 8 minutes and spend a total of 10 minutes in the queuing system. The manager wants to test several alternatives for reducing customer waiting time. ( 1) addition of another employee. (2) addition of another counter. Addition of an employee: Service rate : 40 customers served per hour , Extra employee will cost the bank Rs 150/week . Addition of a new counter: Cost Rs 6000+ Rs 200/week. The bank has determined that for each minute the average waiting time reduced the bank avoids the loss in business equivalent to Rs 75/ week. Find the best strategy for the bank.