Abstract
Tools for modeling the physics of complex engineering devices and for simulation of their behavior are widely available. But, despite advances in requisite hardware and software, their use in CE has not become widespread. On a critical level, the missing ingredient is the array of models that is required to adequately capture the variability of the problems and their environment. The role of classifying the various types of models which capture the CE phenomena is crucial in accomplishing CE benefits. Such classification leads to a common set of CE process templates. This paper discusses this classification and CE process templates.