Energy saving involves two direct benefits: sustainability and cost reduction, both of which Information
Technologies must be aware. In this context, clusters, grids and data centres represent the hungriest con sumers of energy. Energy-saving policies for these infrastructures must be applied in order to maximize
their resources. The aim of this paper is to compare how efficient these policies are in each location of a
grid infrastructure. By identifying efficient policies in each location and the slack in inputs and outputs of
the inefficient locations, Data Envelopment Analysis presents a very useful technique for comparing and
improving efficiency level. This work enables managers to uncover any misuse of resources so that cor rective action can be taken.Ministerio de Economía y Competitividad TIN2009-14378-C02-01 (ARTEMISA)Junta de Andalucía TIC-8052 (Simon
