CSI materials emphasize that constructability reviews (often performed by experienced contractors or construction managers) are highly valuable when a project involves:
Innovative systems or unusual details
Complex sequencing or temporary works
Tight site constraints or aggressive schedules
A constructability review examines whether the design can be built safely, efficiently, and economically, considering available means and methods, typical trade practices, site access, sequencing, and risk. When a design uses innovative or unusual techniques, there is more risk that something may be difficult or impractical to build. CSI and CDT guidance recommend obtaining feedback from construction professionals at that stage.
Why the correct answer is C. Constructability:
The purpose of the review is to assess the buildability of the proposed design: how it will actually be constructed, staged, sequenced, supported, and coordinated among trades. This is exactly what a constructability review is intended to do.
Why the other options are not the best answer:
A. Sustainability – A sustainability review may be appropriate for environmental performance (energy, materials, certifications) but is not specifically focused on making sure an unusual design technique can be constructed.
B. Budget – A budget review checks cost impacts, which is important but does not by itself determine whether the technique is actually constructible.
D. Design – “Design review” is a very broad term and happens continuously. The question is specifically about innovative or unusual design techniques and what type of review is recommended. CSI guidance specifically names constructability review in this context.
Relevant CSI / CDT References (titles only, no links):
CSI Project Delivery Practice Guide – sections on “Programming and Design Phases,” and the role of constructability reviews.
CDT Body of Knowledge – topics on early involvement of construction expertise and constructability reviews.
