Two definitions for diversity exist, diverse routing and diversity from maximum:
* Systems that employ an alternate path for distribution are said to have diverse routing. In terms of an HVAC system, it might be used in reference to an alternate chilled water piping system. To be truly diverse (and of maximum benefit), both the normal and alternate paths must each be able to support the entire normal load.
* Diversity can also be defined as a ratio of maximum to actual for metrics such as power loads. For example, the nominal power loading for a rack may be based on the maximum configuration of components all operating at their maximum intensities. Diversity would take into account variations from the maximum in terms of rack occupancy, equipment configuration, operational intensity, etc., to provide a number that could be deemed to be more realistic