Introduction

• Queuing systems:
  • contain several queues and servers
  • basic components in discrete-event simulation environments
    • in one module (e.g. Arena)
    • as individual blocks (e.g. SimEvents)
  • contain several parameters
    • service time
    • queuing capacity
• Queuing policy:
  • special queue parameter
  • method for selecting entities to leave their queue
  • common values
    • FIFO
    • LIFO
    • Priority
• Non-standard Queuing Policies:
  • entities leave a queue prematurely or in unusual order
  • well-known examples
    • jockeying
    • reneging
  • lots of other schemes, e.g. classing
    • entities have a class attribute
    • external operator calls a class
    • such entities move to front of queue
  • often difficult to implement
  • ARGESIM benchmark C22 studies such queues