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Affordability and Simplification
Data on affordability was important to develop an index and its application. All
sustainability index formation must be in cost-effective. Referring to Atkinson et al.
(1997), no matter how good the theoretical construction of an index, it would only
be useful if the key indicator development was at reasonable cost. According to Lee
and Huang (2007), indicators should be easily understood by respondents without
professional knowledge, and also precise and easy to apply.
Quantifiable and the Framework Ecological Sustainable
Index (ESI)
According to Roldan and Valdes (2002), indicators should be based on data that has
sufficient and high-quality information. The framework is stated in Fig. 2.
Results and Discussion
The urban methodology was used to analyse the ecological sustainability index in
Tasik Kenyir. The method by Pearce and Giles (1995), through classification of the
sustainability index, were used as shown in Table  1. This classification was also
adopted from a study in China study by van Dijk and Mingshun (2005).
Sustainable
Ecological index
Management
Political
Natural Resources
Environment
Water quality index
Water disappearance
rate
Percentage of
development area
Air pollution index
Political plan
Management
Depletion
resource
Life span
support
Biodiversity
Human activities
Area use
Current environment
problem
Demographic
factors.
Urban sustainable development
Fig. 2 The framework of an ecological sustainable index (ESI)
M. N. A. Rahman et al.