Case Study: Single Server Example

Submitted: 26 Jul 2009

Operations Research Topics: SimulationModelling

Application Areas: Telecommunications Networks

Contents

Problem Description

An application server receives requests for jobs, e.g., to view a web page.

More coming soon!

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Problem Formulation

Coming soon!

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Computational Model

The attached flash movie shows how to build a simulation model of the Single Server Example in Arena:

Single Server Arena Tutorial

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Results

Once your Arena model is complete, you can run the model for multiple replications and get estimates for various different quantities:

Running the Single Server Model in Arena

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Conclusions

Coming soon!

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Extra for Experts

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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Topic attachments
I Attachment History Action Size Date Who Comment
SWF (Shockwave Flash)swf dynamic-single-server.swf r1 manage 620.3 K 2009-07-26 - 10:00 TWikiAdminUser Dynamic Simulation with the Single Server Model
SWF (Shockwave Flash)swf run-single-server.swf r1 manage 1042.0 K 2009-07-26 - 09:59 TWikiAdminUser Running the Single Server Model
SWF (Shockwave Flash)swf single-server.swf r1 manage 330.1 K 2009-07-26 - 05:57 TWikiAdminUser Single Server Arena Tutorial
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Topic revision: r2 - 2009-07-26 - TWikiAdminUser
 
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