ABSTRACT
Sustainability assessment involvesmany perspectives but three key steps can
be identified. Firstly, there is the integration of economic, environmental, and social assessments and the assurance that adequate levels of performance
in all three criteria are met. Secondly, there is the projection into the future to ensure that standards in economic, environmental, and social criteria do
not deteriorate over future time horizons; this involves postulating a number
of scenarios against which proposed projects or plans (or lack of them) can
be examined. Thirdly, there is the establishment of sustainability indicators
which enable quantification of performance and progress over time.
