Abstract: Queuing system with preparation period is that part of the customers have preparation period with probability p,which means they have a period to prepare between arrival time and service part,and the others start the service directly.A program was written to simulation the problem.To simulate different systems,the number of service stations,parameter values,the number of service counters and the distribution which the preparation period obeyed were adjusted.The research results were obtained through the analysis of performance index and the comparison of queuing graphs.The overall results show that the preparation period will affect the system,and aggravate congestion degree.

Key words: Queuing theory,Preparation period,Simulation