Problems with computer models

Computer-based models are widely used today as part of fire safety design. There is, though, considerable concern about whether or not the use of such models may be leading to unacceptable options being adopted. This concern covers all types of models, including those based on computational fluid dynamics. Models should only ever be used as an aid within a context of fire knowledge and experience and certainly not as a sole source of decision-making. Models are not the real world. The limitations and conditions of applicability of a model need to be thoroughly understood by users. This article discusses these and related issues.