Every project is different; all of the variables at play make for unique situations and dynamic experiences. The same can be said about specific pieces and parts of the project, including commissioning services. In commissioning, there are different players, different issues and different challenges. To help deal with dynamic projects and diverse scenarios, lessons learned can serve as powerful tools for helping to make the next project a success. With over 20 years of commissioning services, we put together a list of common pitfalls to successful commissioning, the cause of these pitfalls and ways to avoid them in the future.