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  • 2018 Corporate Responsibility Report

PUE ESG KPI

The efficiency of our data centers is monitored with the so-called PUE img factor (Power Usage Effectiveness). It serves as an indicator for improvements in energy efficiency of our data center infrastructure. It is calculated as the ratio between the total electrical energy consumed by the data center and the electrical energy consumption of the IT. Between 2011 and 2018, we were able to reduce the average global PUE value of our T-Systems data centers from 1.85 to 1.63. For Germany, a decline from 1.67 to 1.57 was achieved between 2008 and 2018.