What contains detailed descriptions of design, installation, or performance issues that are at variance with the OPR?

• A. The Issues Log
• B. The Commissioning Plan
• C. The Basis of Design
• D. The OPR

Answer: (A)

Recording deviations from the owner's project requirements is the central idea here. The Issues Log is used to capture detailed descriptions of design, installation, or performance issues that are at variance with the OPR, including what is off, where it occurs, and why it matters, along with the proposed fixes, who is responsible, and target completion dates. It stays a living document, updated as issues are investigated, verified, and closed, providing traceability so every discrepancy can be resolved and the project ultimately aligns with the owner's needs. The Commissioning Plan outlines how commissioning will be carried out, the Basis of Design documents the design intent and performance criteria, and the OPR states the owner’s requirements; none of these serves as the ongoing registry of deviations, which is the role of the Issues Log.