Workers come to tool store room to receive special tools (required by them) for accomplishing a particular project assigned to them. The average time between two arrivals is 60 seconds and the arrivals are assumed to be in Poisson distribution. The average service time (of the tool room attendant) is 40 seconds. Determine (a) Average queue length (b) Average length of non-empty queues (c) Average number of workers in system including the worker being attended (d) Mean waiting time of an arrival (e) Average waiting time of an arrival (worker) who waits 2. The type of policy to be established. In other words, determine whether to go in for an additional tool store room attendant which will minimize the combined cost of attendants’ idle time and the cost of workers’ waiting time. Assume the charges of a skilled worker Rs. 4 per hour and that of tool store room attendant Rs. 0.75 per hour.

The type of policy to be established. In other words, determine whether to go in for an additional tool store room attendant which will minimize the combined cost of attendants’ idle time and the cost of workers’ waiting time. Assume the charges of a skilled worker Rs. 4 per hour and that of tool store room attendant Rs. 0.75 per hour.