Sustainability measurement is a set of frameworks or indicators used to measure how sustainable something is. This includes processes, products, services and businesses. Sustainability is to quantify.[1] It may even be impossible to measure as there is no fixed definition.[2] To measure sustainability, frameworks and indicators consider environmental, social and economic domains. The metrics vary by use case and are still evolving. They include indicators, benchmarks and audits. They include sustainability standards and certification systems like Fairtrade and Organic. They also involve indices and accounting. They can include assessment, appraisal[3] and other reporting systems. The metrics are used over a wide range of spatial and temporal scales.[4][2] For organizations, sustainability measures include corporate sustainability reporting and Triple Bottom Line accounting.[1] For countries, they include estimates of the quality of sustainability governance or quality of life measures, or environmental assessments like the Environmental Sustainability Index and Environmental Performance Index. Some methods let us track sustainable development.[5][6] These include the UN Human Development Index and ecological footprints.
A set of well defined and harmonized indicators can help to make sustainability tangible. Those indicators are expected to be identified and adjusted through empirical observations (trial and error).[9] The most common critiques are related to issues like data quality, comparability, objective function and the necessary resources.[10] However a more general criticism is coming from the project management community: "How can a sustainable development be achieved at global level if we cannot monitor it in any single project?".[11]
^Dalal-Clayton, Barry and Sadler, Barry 2009. Sustainability Appraisal: A Sourcebook and Reference Guide to International Experience. London: Earthscan. ISBN978-1-84407-357-3.[page needed]
^Hak, T. et al. 2007. Sustainability Indicators, SCOPE 67. Island Press, London. [1]Archived 2011-12-18 at the Wayback Machine