Supplement 13 to the ITU-T L-series Recommendations comprises a case study the goal of which is to clarify the greenhouse gas (GHG) emission reduction effect of some new energy saving technologies in a data centre.

The purpose of the study is to assess the production and operation of introducing a more energy-efficient data centre and to compare its impact to a previous set-up. This case study is intended to be open to the public.

In this case study, a hybrid approach was applied. The hybrid approach used in this study includes input-output analysis (IOA) for production and end-of life and process-sum analysis for usage.