The resultant hierarchical indicator system design includes four principles, 11 criteria and 35 indicators linked to the environmental, social, governance and economic dimensions.
With respect to future research, existing studies on indicator systems design mostly focused on countries (or government), corporations, and individuals as economic agents while neglecting online market credit.
The indicator system is designed to be easily updated and to cope with changes.
Based on 70 fish and considering previous studies (230 fish), an environmental indicator system was designed.
An indicator system was designed for the urban population CEN with three sub-CENs as second-level indicators, i.e., the environmental ecological niche, the social ecological niche and the economic ecological niche, each of which has five third-level measurable indicators.
Using m-cresol purple as indicator dye and a spectrophotometric measurement system designed at Scripps Institution of Oceanography (B. Carter, A. Dickson), a precision better than ±0.001 and an accuracy between ±0.01 and ±0.02 was achieved within the observed pH and salinity ranges in the Baltic Sea.
A common practice is to use an indicator system for designing and implementing tourism models that focuses on the sustainability approach.
Those include access to the most recent version of MDGInfo, a database system designed for the compilation and presentation of development indicators for the global monitoring of progress achieved towards the MDGs since 1990.
Therefore, indicator systems should be designed to capture target agent features.
Integration of available information on environmental and human health trends may form the basis for a screening level indicator system that can be used to design a biomonitoring program.
