Software Energy Footprint Index

System YEAR AE (kWh/Year) ET (Wh/transaction) RE (relative efficiency)
Digipoort eMail service 2012 153.509 1,27 34%
DigiD machtigen Autorisation service 2012 12.800 38 11%
Digilevering Transport service 2013 4.147 1,14 55%
eMail spam filter 2013 38.397 0,044 24%
WABO-law implementation 2013 4.257 128 10%
TNO IJkdijk 2013 10.071 0,28 NA
Physical access control backend 2013 98.288 51,95 12%
Governmental meeting planning service 2014 4.979 27,3 12%

In progress

System YEAR AE (kWh/Year) ET (Wh/transaction) RE (relative efficiency)
Governmental authentication system 2015 - 2016
ECP group 2016


Validated by Software Improvement Group

Why do it ?

Great strides have been made to increase the energy efficiency of hardware, data center facilities, and network infrastructure. These Green IT initiatives aim to reduce energy-loss in the supply chain from energy grid to computing devices. However, the demand for computation comes from software applications that perform business services. Therefore, to measure and improve efficiency for entire systems, energy-efficiency indicators are needed at the level of services.

What is it?

The Software Energy Footprint Index (SEFindex) is a standardised method to determine an energy profile of e-services. It consists of a set 3 indicators for energy-efficiency. The method was initially performed on two e-government services of the Dutch national government. The initiative won the ICT-Milieu Award 2013.

How to use it?

The SEFindex serves as a starting point for energy- optimization initiatives, supported by appropriate contractual agreements between service owners and suppliers. In this video the idea behind the index is explained by Joost Visser.

Related links:

#KNGS 22 jan 2015 download

10 best practices for a green system in Dutch

Logius Annual report
ECP invitation
ICT-Milieu Award 2013
Video: introduction of SEFindex


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