Typical parameters in impact prediction and decision-making

Typical parameters to be taken into account in impact prediction and decision -making include:
•  nature (positive, negative, direct, indirect, cumulative);
•  magnitude (severe, moderate, low);
•  extent/location (area/volume covered, distribution);
•  timing (during construction, operation, decommissioning, immediate, delayed, rate of change);
•  duration (short term, long term, intermittent, continuous);
•  reversibility/irreversibility;

•  likelihood (probability, uncertainty or confidence in the prediction);
•  significance (local, regional, global).