Carrying capacity is a powerful concept for policy making although from a scientific
perspective it has met with considerable controversy due to the analytical difficulties in
arriving at a “calculated” capacity (threshold or limit). This difficulty stems from the
multiple dimensions of the concept and the inherent constraints in estimating limits in
natural and human ecosystems. Getz (1987) identified six different approaches of
interpretations or methods of determining carrying capacity: Tangible Resource Limits,
Tolerance by the Host Population, Satisfaction of Visitors, Excessive Rate of Growth of
Change, Capacity based on the evaluation of costs and benefits, The role of Capacity in a
Systems Approach. In recent literature the interest on carrying capacity has shifted from
an “objectively” assessed threshold to –policy useful- desired conditions providing more
advantages to planning and decision making. Alternative concepts have been also
suggested in the spirit of management-by-objectives approaches such as Visitor Impact
Management, Limits of Acceptable Change, Visitor Experience Resource Protection
frameworks, instead of TCC.