Which is the fourth phase in identifying owner requirements?

• A. Essential Function
• B. Performance Requirements
• C. Performance Criteria
• D. Performance Specifications

Answer: (D)

In this style of owner requirements development, you refine what the project must achieve from broad to precise. Start by identifying the essential function—the basic purpose the facility must serve. Then specify performance requirements, which are measurable outcomes the project must deliver (for example, capacity, reliability, or uptime). Next come performance criteria, which set the minimum standards and tolerances to determine whether those outcomes are acceptable. The final step is performance specifications, where those requirements are translated into concrete, verifiable technical details that guide procurement, design, and construction, and that define how performance will be tested and proven.

So, the last phase—the one that turns the owner’s needs into actionable, testable instructions for builders and suppliers—is performance specifications.