In retrocommissioning planning phase, what is the next step after the Owner selects the CxA?

• A. Develop Cx scope
• B. CxA reviews existing documentation
• C. CxA surveys existing
• D. Prepare Cx plan

Answer: (A)

Defining the scope sets the boundaries and goals for the entire retrocommissioning effort. After the owner selects the CxA, the immediate task is to outline what systems and controls will be included or excluded, the performance targets to achieve, the data and documentation required, responsibilities, schedule, and acceptance criteria. This scope provides the roadmap that guides what documentation will be reviewed, what field surveys or measurements are needed, and how the commissioning plan will be structured. Without a clear scope, later activities can drift, miss important areas, or waste effort. So, establishing the Cx scope first gives a solid foundation for the subsequent steps like reviewing existing documentation, surveying equipment and operations, and preparing the commissioning plan.