Commissioning ensures that a new building operates initially as the owner intended and that building staff are prepared to operate and maintain its systems and equipment. Maintenance staff should be familiar with building systems and take ownership of the building prior to the building being occupied by fulltime tenants. A peer review of the design can also be provided to ensure that owners requirements are being met and the most effective and efficient design methods are being incorporated. At a minimum, the design should be reviewed for constructability and maintainability of systems.