This document:

a)      

defines metrics as key performance indicators (KPIs) for resilience, dependability, fault tolerance and availability tolerance for data centres;

b)      

covers the data centre infrastructure (DCI) of power distribution and supply, and environmental control;

c)       

can be referred to for covering further infrastructures, e.g. telecommunications cabling;

d)      

defines the measurement and calculation of the KPIs and resilience levels (RLs);

e)      

targets maintainability, recoverability and vulnerability;

f)        

provides examples for calculating these KPIs for the purpose of analytical comparison of different DCIs.

This document does not apply to IT equipment, cloud services, software or business applications.