In the Retro/Re-Commissioning Planning phase, which item is the final step?

• A. The owner selects the commissioning authority
• B. Review existing documentation
• C. Carry out a survey to gather needed information
• D. Prepare commissioning plan

Answer: (D)

In planning for retro/re-commissioning, you move from gathering inputs to formalizing how the project will be executed. After you’ve identified the team and gathered information from reviewing existing documentation and conducting surveys, you need a formal document that ties everything together. Preparing the commissioning plan does exactly that: it documents the scope, objectives, tasks, responsibilities, schedule, and verification methods, and it becomes the controlling guide for all subsequent activities. Without this plan, the work wouldn’t have a defined roadmap or measurable expectations. The other steps—selecting the commissioning authority, reviewing existing docs, and carrying out surveys—are prerequisite inputs that feed into the plan, but the plan itself is the final, definitive step that enables the retro-commissioning work to proceed.