Successful recovery from a power failure has its roots in a well planned and executed design which considers the issues outlined to this point and proactively address them. Taking steps during the construction process to ensure the design is implemented as intended in the next step in the process. Functional testing targeted at verifying the integrity of the installed systems when challenged by a power outage is the final step in ensuring reliable performance under challenging operating conditions.
Buildings and systems that have not had the benefit of a design and construction process which included consideration of the response to a power failure will still recognize some benefit from power failure recovery testing. However it is likely that this process will uncover previously unacknowledged issues that may be challenging and costly to correct given that the systems are in place. The level of risk is also somewhat higher in these situations given the lack of attention to the issues during design and construction.