Holistic assessment approaches for developing and implementing sustainability strategies for shaping strategic policies are needed on all levels of different public and private sectors. Such approaches would require Key Performance Indicators for quality assessment analysis of the three main pillars of sustainability, i.e. social, environmental and economic. How would such approaches and indicators look like?

See, this example on a partial approach

http://reliabilityweb.com/index.php/articles/measuring_sustainable_change/