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The DCEM Global KPI specifies the coefficient or "Global KPI" of the eco-efficiency and energy management of data centres. It combines two indicators: one taking into account different sizes of data centre (S, M, L or XL) and a second incorporating 9 different levels of performance, similar to the energy classification model used for home appliances.
ETSI said its work will allow benchmarking of data centres or ITC locations in a wide range of industrial sectors.
http://www.etsi.org/deliver/etsi_es/205200_205299/2052000201/01.02.01_60/es_2052000201v010201p.pdf