CONSTRUCTING DESIGN SPACES Case Studies in Parametric Building Performance Analysis at Perkins+Will Victor Okhoya Marcelo Bernal Cheney Chen Tyrone Marshall John Haymaker okhoya@gmail.com Abstract Parametric analysis is an important method of design exploration in architectural practice. However, architects do not take full advantage of its capabilities because they lack systematic methods for rigorous implementation. Design Space Construction (DSC) is a parametric analysis framework aimed at making multidisciplinary design exploration more methodical. This paper discusses three case studies of projects that have undertaken DSC for performance-driven building design. The projects reviewed involve massing and envelope configuration and construction decisions for a high school academic building, a high-rise commercial-residential development, and a university students’ residence, all located in British Columbia, Canada. The paper describes the processes used in executing DSC, the types of questions it helped answer, and the conclusions design teams drew from the process. We compare these outcomes to more typical simulation approaches used in practice. The paper concludes with a discussion of the perceived benefits of DSC and the challenges faced constructing and exploring the design spaces. Keywords: design exploration, parametric analysis, design space construction, building performance analysis