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The purpose of this article is to try to evaluate the performance of the intervention of support structures, to point out their limits and try to suggest some recommendations for improvement.This evaluation was realized thanks to a qualitative and a quantitative study conducted respectively in 2009 and 2013, covering thirteen Tunisian support structures. We bring together the results for those structures to perceive the accompanying limits more easily.The recommendations we propose will be first in a general order, applicable to the majority of the same type of structures, and then more specific to the Tunisian context