This presentation will explore the fundamentals of new construction (Cx) commissioning for critical facilities. The presentation starts with the introduction to commissioning as defined by ASHRAE Guideline lines and Standards. This will be followed by a review of the challenges with the variability of Cx projects. The process for Cx will be broken down into a step-by-step flow with details and examples provided at each step. Case studies will be presented for Cx scenarios with best practices, lessons learned, and project benefits. The benefits of data visualization will be discussed for Cx projects and how they apply to the newer generation of engineers. The presentation will close with some safety aspects of Cx.