During which design phase are alternative building systems generally assessed?

During the Schematic Design (SD) phase, alternative building systems are typically assessed. This phase occurs early in the design process and is critical for establishing the project's overall concept and direction. During this time, various design options and strategies can be explored to determine the best approach for the project.

In assessing alternative building systems, the design team considers factors such as feasibility, cost, structural integrity, sustainability, and how each system meets the project requirements. This exploration ensures that decisions made in later phases are based on a thorough understanding of the possibilities available.

In the following phases, such as Design Development (DD) and Construction Document (CD), the focus shifts to refining the chosen system and detailing specific elements rather than assessing multiple alternatives. The Construction Phase involves implementing the identified design, further reducing the opportunity for evaluating alternative systems. Thus, the SD phase is the most appropriate time for this important assessment.