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In our research we investigate the output accuracy of discrete eventsimulation models and agent based simulation models when studying human centriccomplex systems. In this paper we focus on human reactive behaviour as it ispossible in both modelling approaches to implement human reactive behaviour inthe model by using standard methods. As a case study we have chosen the retailsector, and here in particular the operations of the fitting room in the womenwear department of a large UK department store. In our case study we looked atways of determining the efficiency of implementing new management policies forthe fitting room operation through modelling the reactive behaviour of staffand customers of the department. First, we have carried out a validationexperiment in which we compared the results from our models to the performanceof the real system. This experiment also allowed us to establish differences inoutput accuracy between the two modelling methids. In a second step amulti-scenario experiment was carried out to study the behaviour of the modelswhen they are used for the purpose of operational improvement. Overall we havefound that for our case study example both discrete event simulation and agentbased simulation have the same potential to support the investigation into theefficiency of implementing new management policies.

Comparing Simulation Output Accuracy of Discrete Event and Agent Based Models: A Quantitive Approach