Abstract

The purpose of this paper is to provide an analysis of the concept of model as it is applied in the physical sciences, and to show that this analysis is fruitful insofar as it can be used as an acceptable account of the role of models in physical explanation.A realist interpretation of theories is adopted as a point of departure. A distinction between theories and models is drawn on the basis of this interpretation. The relation between model and prototype is expressed in terms of the concepts of access and accessibility, and four conditions are proposed as an analysis of the concept of model. It is concluded that models are introduced when approximate methods are used.