Mission IBPSA is founded to advance and promote the science of building performance simulation in order to improve the design, construction, operation, and maintenance of new and existing buildings worldwide. Vision The building industry, without a doubt, is one of the most important industrial and economical sectors influencing the quality of life and the environment. And yet, planners and property developers pay very little attention during the design process to the life-cycle cost of owning and operating buildings. Building Simulation offers the potential to cope adequately with building performance related concerns, as well as with the construction process. Increasingly, computer based models (programs) are being employed to aid in the design, operation, or management decision making process. The DEVELOPMENT, EVALUATION, USE IN PRACTICE, and STANDARDIZATION, of the models and programs in therefore of growing importance. For building Design, Construction, Operation, Maintenance and Management activities, there is also an urgent need for the INTEGRATION of “generally applicable” and “generally accepted” methods and tools, for various applications, each having various levels of complexity and/or various types of end-users. Also important is the TECHNOLOGY TRANSFER challenge within the building modeling field. Goal The following goals were identified at the inception of IBPSA: - Identify problems within the built environment that may be solved by improved simulation tools and techniques; - Identify the performance characteristics of buildings on which simulation should be focused; - Identify building performance simulation research and development needs and transfer new developments to the user; - Promote standardization of the building simulation industry; and - Inform and educate its members and the public regarding the value and the state-of-the-art of building performance simulation.