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PREFACE:

in the December 16, 2002, issue of the LaiserinLetter ™ , in what may have been the fi rst widely published article on the topic, industry analyst Jerry Laiserin weighed in on the debate over a new term or acronym to describe the newly emerging design technology then poised to replace computer - aided design (CAD). 

 Laiserin opined that the lack of a clear, meaningful term for this new technology was “ a deadly serious issue that [if left unresolved] can stymie meaningful discussion. ” Citing a recent meeting of building industry strategists in which more than half of the scheduled meeting time had been devoted to crafting a term that all attendees could agree upon, Laiserin made a cogent argument for the term “ building information modeling, ” or BIM, as the best term to describe “ the next generation of design software.

 ” Many have since attributed authorship of the phrase to Laiserin, a misconception he definitively corrects in his introduction to the BIM Handbook by providing the most complete written account to date of the term ’  s evolution.

 There can be little doubt, though, that Laiserin ’  s 2002 article marks the point at which the term “ BIM ” first came into popular use. The new acronym addresses the problem that Laiserin articulated by differentiating the digital design tools available to the building industry today from the CAD tools first developed a generation earlier.

 But the debate over the precise meaning of the term continues. In countless meetings and industry forums, far too much time is still devoted to defi ning exactly what the terms “ building information model ” and “ building information modeling ” really mean.

 The continuing confusion, as we see it, can be attributed to the multiple meanings of the word “ model. ” In his 2002 article, Laiserin made note of these multiple, precise, and useful meanings, among them “ the mathematical or digital description of objects or [complex] systems, [such as] econometric models and weather models, as well as physical models of 3D objects.

 ” He also noted that the verb form to model, which building design professionals commonly construe as the act of constructing a physical, scaled model, “ also implies a process of . . . building performance simulation (essentially, modeling future behavior). ”.