The previous articles in this series introduced the technical commissioning (Cx) process and discussed the importance of communication between the building owner and the design, construction, and Cx teams. After completing the Owner's Project Requirements (OPR) and Basis of Design (BOD) documents, the next step on the path to project success is preparing a detailed, step-by-step Cx Plan. This article serves as a general overview of how to prepare a Cx Plan.