Abstract
The functionality of measuring the sustainability of societies is a quizzical concept. The foundation of this manuscript utilises the index of sustainable functionality (ISF) via four key recommendations: (1) uncertainty and sustainability governance, (2) definitional concerns, (3) characterising measurability and natural capital and (4) measuring sustainability toward an indicator-based system. Each development is examined from an appraisal viewpoint, since sustainability measures are complex and subjective. The examination formulates the methodology for the design of a novel ISF model. Reviewed methodological recommendations are to be integrated to better cognise measurability via historical to present-day trends. The research is based on decision-making and learning from state-of-the-art and source deliberation. At length, it is the aspiration of the authors that this work add knowledge-base and decrease levels of unsustainable action.