Energy Usage Effectiveness (EUE) is a key figure used to evaluate the energy requirements of data centers, comparable to Power Usage Effectiveness
(PUE). Power Usage Effectiveness (PUE) relates the total energy consumed by a data center to the power consumption of the IT systems. Since the PUE value is often calculated for relatively short periods of time, seasonal temperature fluctuations are not included in the calculation. For this purpose, the Energy Usage Effectiveness (EUE) parameter was developed, which maps the ratio over a year and thus eliminates seasonal fluctuations.