Reusability of Conceptual Models: The Problem of Model Variations

Conceptual models are aimed at providing a formal representation of a domain in the real world. However, it is commonly known that different people construct different models of a given domain. While prior research dealt mainly with modeling errors, this paper explores variations among correct models. Model variations, though frequently harmless, may have severe consequences when similarity of models is to be assessed for purposes of reuse. This paper presents the problem of model variations and its effect on reusability. In particular, it suggests that in order to increase reusability the variations among models should be anticipated in advance. This could be achieved either theoretically or empirically. Corrective actions may include conclusive modeling rules and proper reuse mechanism design. The paper suggests a theoretical framework for understanding the sources of variations and demonstrates an empirical investigation of variations and their reusability impacts when applied to a reuse application.