Rather than run trial replications in order to estimate how many replications are necessary to ensure the accuracy of a particular output, we can use dynamic simulation. Dynamic simulation measures the accuracy, i.e., half-width, of an output at the end of each replication and stops replicating once the desired accuracy has been achieved.

In Arena, this is implemented by setting the maximum number of replications "on the fly". However, this means that one extra replication is always performed. See the attached flash movie for a tutorial on implementing dynamic simulation:

Dynamic Simulation for the Single Server Model in Arena

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Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
swf	dynamic-single-server.swf	r1	manage	620.3 K	2009-07-26 - 10:00	TWikiAdminUser	Dynamic Simulation with the Single Server Model
swf	run-single-server.swf	r1	manage	1042.0 K	2009-07-26 - 09:59	TWikiAdminUser	Running the Single Server Model
swf	single-server.swf	r1	manage	330.1 K	2009-07-26 - 05:57	TWikiAdminUser	Single Server Arena Tutorial