Integrated Project Delivery (IPD) is described as which of the following?

• A. All participants work independently with minimal collaboration
• B. The design-build firm controls the schedule
• C. The owner retains sole design authority
• D. All participants collaborate closely from the project's earliest conceptualization to move-in

Answer: (D)

IPD is about aligning all key participants—owner, architects, engineers, and constructors—into a single integrated process from the earliest concept through move-in. In this approach, risks and rewards are shared, and decisions come from the integrated team guided by common goals rather than a single party's authority. This collaboration is supported by a multi‑party contract and open communication, with incentives aligned to cost, schedule, quality, and value optimization. The result is reduced duplication, fewer conflicts, and issues resolved early in design and construction. Therefore, the description that all participants collaborate closely from the project's earliest conceptualization to move-in best captures IPD.