Simulation and modeling - Old Questions
1. Explain the steps in simulation study. What are the limitation of simulation?
10 marks
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Asked in 2071
Simulation is the imitation of the operation of a real-world process or system over time. Simulation involves the generation of an artificial history of the system, and the observation of that artificial history to draw inferences concerning the operating characteristics of the real system that is represented.
Steps in simulation study
- 1.Problem formulation
- Clearly state the problem.
- 2. Setting of objectives and overall project plan
- How we should approach the problem.
- 3. Model conceptualization
- Establish a reasonable model.
- 4. Data collection
- Collect the data necessary to run the simulation (such as arrival rate, arrival process, service discipline, service rate etc.).
- 5. Model translation
- Convert the model into a programming language.
- 6. Verification
- Verify the model by checking if the program works properly. Use common sense.
- 7. Validation
- Check if the system accurately represent the real system.
- 8. Experimental design
- How many runs? For how long? What kind of input variations?
- 9. Production runs and analysis
- Actual running the simulation, collect and analyze the output.
- 10. Repetition
- Repeat the experiments if necessary.
- 11. Document and report
- Document and report the results.
- 12. Implementation: Implement the simulated system in the real world if the simulation results show that it is advantageous to implement the new system or policy.
- Limitations of simulation
- Building model requires specialization which is the art learned through experience.
- In some cases, the results of the simulation may be so complex to interpret.
- It may be time consuming and expensive.