The history of BPS is approximately as long as that of [[computer]]s. The very early developments in this direction started in the late 50's1950s and early 60's1960s in the United States and Sweden. During this period, several methods had been introduced for analyzing single system components (e.g. gas boiler) using steady state calculations.The very first reported simulation tool for buildings was '''BRIS''', introduced in 1963 by the [[Royal Institute of Technology]] in Stockholm.<ref>{{cite journal|last1=Brown|first1=Gösta|title=The BRIS simulation program for thermal design of buildings and their services|journal=Energy and Buildings|date=January 1990|volume=14|issue=4|pages=385–400|doi=10.1016/0378-7788(90)90100-W}}</ref> Until the late 60's1960s, several models with hourly resolution had been developed focusing on energy assessments and heating/cooling load calculations. This effort resulted in more powerful simulation engines released in the early 70's1970s, among those were BLAST, DOE-2, [[ESP-r]], HVACSIM+ and [[TRNSYS]].<ref>{{Cite web|url=http://www.ibpsa.org/%5Cproceedings%5CBS1999%5CBS99_P-01.pdf|title=Early history and future prospects of building system simulation|last=Kusuda|first=T.|date=1999|website=IBPSA Proceedings|access-date=2017-07-07}}</ref> In the United States, the [[1970s energy crisis|1970's energy crisis]] intensified these efforts, as reducing the energy consumption of buildings became an urgent domestic policy interest. The energy crisis also initiated development of U.S. building energy standards, beginning with [[ASHRAE 90.1#Standard 90-1975|ASHRAE 90-75]].<ref>{{Cite journal|last=Sukjoon|first=Oh|date=2013-08-19|title=Origins of Analysis Methods in Energy Simulation Programs Used for High Performance Commercial Buildings|url=http://oaktrust.library.tamu.edu/handle/1969.1/151151|language=en}}</ref>
The development of building simulation represents a combined effort between academia, governmental institutions, industry, and professional organizations. Over the past decades the building simulation discipline has matured into a field that offers unique expertise, methods and tools for [[building performance]] evaluation. Several review papers and state of the art analysis were carried out during that time giving an overview about the development.<ref>{{Cite journal|last=Augenbroe|first=Godfried|last2=Hensen|first2=Jan|date=2004-08-01|title=Simulation for better building design|journal=Building and Environment|series=Building Simulation for Better Building Design|volume=39|issue=8|pages=875–877|doi=10.1016/j.buildenv.2004.04.001}}</ref><ref>Hensen, J. (2006). [http://www.janhensen.nl/publications_folder/06_ibpsa-cz_hensen.pdf About the current state of building performance simulation and ibpsa]. In ''4th national IBPS-CZ conference'' (p. 2).</ref><ref>{{Cite journal|last=Wang|first=Haidong|last2=Zhai|first2=Zhiqiang (John)|date=2016-09-15|title=Advances in building simulation and computational techniques: A review between 1987 and 2014|journal=Energy and Buildings|volume=128|pages=319–335|doi=10.1016/j.enbuild.2016.06.080}}</ref>
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== BPS in practice ==
Since the 90's1990s, building performance simulation has undergone the transition from a method used mainly for research to a design tool for mainstream industrial projects. However, the utilization in different countries still varies greatly. Building certification programs like [[Leadership in Energy and Environmental Design|LEED]] (USA), [[BREEAM]] (UK) or [[DGNB]] (Germany) showed to be a good driving force for BPS to find broader application. Also, national building standards that allow BPS based analysis are of good help for an increasing industrial adoption, such as in the United States ([[ASHRAE 90.1]]),<ref name=":1" /> Sweden (BBR),<ref>{{Cite web|url=https://www.boverket.se/en/start-in-english/|title=BBR - Swedish building regulation|access-date=2018-03-29}}</ref> Switzerland (SIA)<ref>{{Cite web|url=http://www.sia.ch/en/the-sia/|title=Swiss society of architects and engineers (SIA)|access-date=2018-03-29}}</ref> and the United Kingdom (NCM).<ref>{{Cite web|url=https://www.uk-ncm.org.uk/|title=UKs National Calculation Method|access-date=2018-03-29}}</ref>
The Swedish building regulations are unique in that computed energy use has to be verified by measurements within the first two years of building operation. Since the introduction in 2007, experience shows that highly detailed simulation models are preferred by modelers to reliably achieve the required level of accuracy. Furthermore, this has fostered a simulation culture where the design predictions are close to the actual performance. This in turn has led to offers of formal energy guarantees based on simulated predictions, highlighting the general business potential of BPS.<ref>{{Cite web|url=http://www.gbpn.org/databases-tools/bc-detail-pages/sweden#Summary|title=Swedish code summarized in global performance network|access-date=2018-03-29}}</ref>
