A means for making corrections. Choosing indicators user driven. Choosing indicators requires co-operation between policy makers and scientists. Together, scientists and policy makers choose significant indicators based on ecological and societal considerations.
Indicators are a communication tool between policymakers and scientists.
A baseline is an essential element of an indicator and indispensable in assessing ecosystems. They provide significance to data, provide a common denominator which makes figures consistent within and between countries, and allow for data aggregation to highly aggregated indicators. The NCI framework intends to provide information on the state and changes in biodiversity due to human interventions. It has been developed considering the criteria below. Species extinction is only the last step of a long process of ecosystem degradation.