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Abstract
This paper explores the model development process in discrete-event simulation (DES) by reporting on an empirical study that follows six expert modellers while building simulation models. DES is a widely used modelling approach, however little is known about the modelling processes and methodology adopted by modellers in practice. Verbal Protocol Analysis is used to collect data, where the participants are asked to speak aloud while modelling. The results show that the expert modellers spend a significant amount of time on model coding, verification and validation, and data inputs. The modellers iterate often between modelling activities. Patterns of modelling behaviour are identified, suggesting that the modellers adopt distinct modelling styles. This study is useful in that it provides an empirical view of existing DES modelling practice, which in turn can inform existing research and simulation practice as well as teaching of DES modelling to novices.
Acknowledgements
The author thanks Professor Stewart Robinson for the help and suggestions provided. Thanks also go to the modellers who participated in the experiment and to Suchi Collingwood for the help in blind checking the protocols. This paper is an extended version of the paper titled: ‘Model development in discrete-event simulation: Insights from six expert modellers’, presented at the 2011 Winter Simulation Conference.