Introduction
    
      - Simulation environments for Discrete Event Modeling:
        
          - component based graphical user interface
 
          - standard components
            
              - Generators
 
              - Queues
 
              - Servers
 
              - Gates
 
              - etc.
 
            
           
          - mainly standard queuing behaviour
            
          
 
          - adding flexibility
            
              - integration of callbacks
 
              - self-programmed components
 
            
           
        
       
      - ARGESIM benchmark C22:
        
          - "Non-standard Queuing Policies"
 
          - one standard and three non-standard queuing systems
 
          - difficulties
            
              - entities can leave the queue prematurely
 
              - queuing order can be changed dynamically
 
            
           
          - one implementation in MatlabGPSS (so far)