Question

1. People arrive at a newspaper stand with an interarrival time that is exponentially distributed with a mean of 0.5 minute. 55% of the people buy just the morning paper, while 25% buy the morning paper and a Wall Street Journal. The remainder buys only the Wall Street Journal. One clerk handles the Wall Street Journal sales, while another clerk handles morning paper sales. A person buying both goes to the Wall Street Journal clerk. The time it takes to serve a customer is 40+4 seconds for all transactions. (a) Write a GPSS program to simulate this system and collect statistics on queues for each type of transactions. Simulation for 2 hours. (b) Suggest ways for making the system more efficient. Use simulation results to support your suggestions.

Answer 1

SIMULATE GENERATE 1 CREATE CUSTOMERS QUEUE 0.5 CUSTOMERS QUEUE UP IF NECESSARY SEIZE 55 ENGAGE THE BARBER WHEN HE BECOMES AVAILABLE DEPART 25 CUSTOMER LEAVES THE QUEUE ADVANCE 15,3 CUSTOMER GETS HIS HAIR CUT RELEASE 3 RELEASE THE BARBER TERMINATE 0 LEAVE THE BARBER SHOP GENERATE 480 GENERATE A TIMER AFTER 8 HOURS OF SIMULATED TIME * TERMINATE 1 SHUT OFF THE RUN START 1 CARRY OUT THE SIMULATION END RETURN CONTROL TO THE OPERATING SYSTEM