A systemic comparative assessment of the multifunctional performance of alternative olive systems in Spain within an AHP-extended framework

The concept of sustainable agriculture is strongly related to the multifunctional role, either explicitly or implicitly, recognized to the primary sector. When assessing the performance and value to society of particular agricultural systems, the multifunctional nature of agriculture requires an approach based on multicriteria. Amongst others, these include economic, environmental, social, cultural and technical criteria. Like other complex multicriteria analyses, this evaluation of agricultural systems is characterized by the existence of not only many, but often conflicting criteria, multiple stakeholders and decision-makers who have competing interests, lack of information and a consideration of the high risks involved.The Analytic Hierarchy Process (AHP) is a methodology that deals with problems of this sort in a relatively easy, flexible and economical manner. Therefore it is a potentially useful tool for the practical resolution of complex problems, often an object of Ecological Economics. One such problem is the analysis of the sustainability of economic activities.This article has three aims. The first is to present AHP as a powerful methodology for assessing multifunctional performances of different agricultural systems in a comparative way. AHP can also be applied to other multifunctional economic activities. The second aim is to propose an extension of AHP for improving the decision-making processes when different groups of decision agents are involved. A final aim is to illustrate the AHP-extended methodology in a particular case study. This is done by using it to compare the multifunctional performance of alternative olive growing systems in Andalusia, a region located in the south of Spain, on the basis of the assessments of different groups of experts. This tests the hypothetically greater sustainability of organic and integrated farming over conventional farming systems in the medium/long term under average conditions for this region. Results for this case study show a greater global performance of organic and integrated agriculture despite differences in the ideological tendencies of the experts, thus providing a scientific basis for endorsing institutional and social support for the promotion and implementation of these farming techniques. Some conflictive issues, however, have been detected, especially in areas related to environmental performance. Further research on the controversial topics is desirable for clarification.