The Retro-commissioning Investigation or Optimization Study must include:

1. 1. Documentation, detailed site review and interviews with building O&M staff
   2. A review of the building automation system
   3. Preparing for and conducting system functional testing
   4. Sources of performance problems
   5. Energy conservation and/or carbon reduction measures with costing, simple payback and anticipated savings
   6. A demonstration that the investigation methodology applied is similar to the BCA’s commissioning best practices (see Other Notes)