An expert system to characterise the surfaces morphological properties according to their tribological functionalities: The relevance of a pair of roughness parameters

► The most relevant pair of roughness parameters is found according to surfaces functionalities. ► This method quantify if only one roughness parameter is required. ► The methodology gives the set of pair of parameters that are equivalent. ► The best pair of parameters allows analyzing more finely the raisons of surface modification. ► Pair of parameters well quantifies the third body abrasive wear.