1. Inter Arrival Times

2. Instead of giving a chance that someone, or something arrives in a particular time interval or not, we use the inter arrival times or arrival intervals. Why?

3. The inter arrival time is just the time between successive arrivals. These times are simulated by random numbers.

4. Queuing Discipline This is the set of rules that determine whose turn it is to be served next. The most common discipline if FIFO. 1 Queue 1 server Customers Server 1234512345 A 1q1s

5. 1 Queue 1 Server Arrival times0.511.522.5 %age1030 2010 Random No.s12,3,45,6,78,910 So when these numbers are generated it stands for the arrival time

6. CarRandomArr IntArr Time 13 25 31 410 54 66 75 83 92 Leave space for 5 more columns

7. Service times Service11.522.53 %525402010 Random No.s 12,3,4 5,6 7 to 1415 to 18 19,20

8. CarRndArr IntArr TimeRndService TStartFinishWait 131115 251.52.54 310.5319 4102.55.58 5416.58 661.5813 751.59.55 83110.512 92111.56 10 2.51415

9. Continue for another 10 cars

10. 1 Queue 2 Servers Here we have 1 queue with say 2 petrol pumps. Customers 123123 Servers A B Single Q 2 Servers

11. CarRndArr IntArr Time RndSer Time StartFinishStartFinishWait 144 288 356 463 523 623 7811 855 962 105

12. CarRndArr IntArr Time RndSer Time StartFinishStartFinishWait 141141.512.5--0 28238235--0 351.54.561.5--4.560 461.563 67.5--0 521731.5--78.50 621831.589.5--0 782101121012--0 851.511.551.5--11.5130 961.51321.51314.5--0 1051.514.510214.516.5--0 Carry on for another 20 cars