“In a climate of escalating utility costs and increasing operating budget pressures, building owners are seeking ways for energy and operational savings to be realized. It is through the process of retro-commissioning that untapped savings potential is achieved while creating a high return-on-investment, and improving building performance.”
Briefing for House of Representatives, March 15, 2011, ASHRAE
I'd never heard of retro-commissioning, so here's what I found on the internet, but it sure sounds like building maintenance to me.
Commissioning of existing buildings or “retrocommissioning,” is a systematic process applied to existing buildings for identifying and implementing operational and maintenance improvements and for ensuring their continued performance over time. Retrocommissioning assures system functionality. It is an inclusive and systematic process that intends not only to optimize how equipment and systems operate, but also to optimize how the systems function together. Although retrocommissioning may include recommendations for capital improvements, the primary focus is on using O&M tune-up activities and diagnostic testing to optimize the building systems. Retrocommissioning is not a substitute for major repair work. Repairing major problems is a must before retrocommissioning can be fully completed.
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