The validation of a building simulation program or model is a daunting task, and one that should receive as much attention as algorithm and code development. Previous research in this field has led to a well-accepted approach composed of analytical verification, empirical validation and inter-program comparative testing to diagnose model deficiencies, mathematical solution errors and coding errors. Through a case study using a model for predicting the thermal and electrical performance of fuel cell micro-cogeneration devices, this article demonstrates the utility of the inter-program comparative testing validation construct. It shows that by comparing program-to-program results, solution problems, coding errors and deficiencies in mathematical model descriptions can be efficiently identified, diagnosed and subsequently repaired.

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Journal of Building Performance Simulation
Department of Mechanical and Aerospace Engineering

Beausoleil-Morrison, I, Griffith, B. (Brent), Vesanen, T. (Teemu), & Weber, A. (Andreas). (2009). A demonstration of the effectiveness of inter-program comparative testing for diagnosing and repairing solution and coding errors in building simulation programs. Journal of Building Performance Simulation, 2(1), 63–73. doi:10.1080/19401490802559409