Simulation model quality issues in product engineering: a review

Dynamic models are of central importance in engineering design for many fields of application but, within some areas, surprisingly little attention is given to the confidence that can be placed on predictions from such models and the implications of model quality, or the lack of it, for design. In recent years the growth of interest in the possible benefits that generic models and model component re-use provide has stimulated new interest in questions of model quality and in the closely associated issues of model testing, verification and validation. This paper considers the link between model quality and the quantitative testing of continuous system simulation models in product engineering and reviews techniques available for the verification and validation of such models. Recent developments and current trends in this field are emphasised, with particular reference to generic models and the re-use of model components. The paper also considers some of the problems inherent in applying rigorous testing and validation procedures. Implications for the education and training of engineering students in the areas of modelling and simulation are considered