This document addresses the development of a building commissioning (Cx) plan for new construction, major renovations, or system and assembly replacement projects. The commissioning plan incorporates commissioning activities which begin during early project stages, and continue through pre-design, design, construction, turnover and the first year of operation. The commissioning plan is developed during the design stage and also address later stages of the project. The commissioning plan presents the intended process to verify and document that the quality of the built project in operation meets the requirements of the owner. This document provides an overarching process for the planning of commissioning any aspect of a building project and is intended for use with system or discipline specific standards. This document does not include retro-commissioning or recommissioning in existing buildings.