Five-point scale: this is divided into five sectors of 20 points each, totaling 100. This model may be useful in explaining the very precise and complicate d information
to stakeholders,as the scales are divided into the most detailed sections among the four models below:
sustainable (excellent): 81–100%;
potentially sustainable (good): 61–80%;
intermediate (medium): 41–60%;
potentially unsustainable (poor): 21–40%; and
unsustainable (bad): 1–20%.