Together with the first volume, Design Techniques, this second volume of the “SOLID” series, published in collaboration with Harvard GSD Department of Architecture, represents two approaches to the same question: how is the architectural project constructed? Architects today act upon organizations or systems that are social assemblies, sequences in time, or spatial networks. Yet these structures act upon architects as well. Is design reducible to organization, or vice versa? Faculty, critics and theorists, and students discuss various approaches and contribute personal experiences, working practices, and opportunities encountered in the field of design.