The integrated design process (IDP) was initially developed in 1993 as a Canadian initiative for high performance buildings.  The IDP is intended to improve the building's energy performance, indoor environmental quality and functionality, and minimize negative impacts on the natural environment (1).

The conventional design processes (CDP) is characterized by a linear structure, in which the architect and client agree on a design concept, with engineers helping to implement the design. Considerations such as the performance of the building, including indoor air quality, temperature regulation, and overall comfort are largely neglected during this process. Later in the process, once construction is underway, there is little opportunity to make modifications that can substantially improve these facets of building performance. These omissions can often result in occupant discomfort, reduced building functionality, and lower energy performance.

The IDP differs from the CDP in that the client, engineers, and architect will collaborate, and all play important roles in the building design and construction. Also included in this IDP team are an energy specialist and a design facilitator. Performance and environmental issues are considered from the initiation of the project. Ultimately, this enhanced consideration of performance, consultation with specialists, and collaboration among various disciplines on the project team often results in a higher-perfomance, functional, more comfortable building with a smaller ecological footprint (1).

Sources:
¹ Larsson, N., 2004. The Integrated Design Process, International Initiative for a Sustainable Built Environment.