Evaluation of the quality of research software is a challenging Background: and relevant issue, still not sufficiently addressed by the scientific community.Our contribution begins by defining, precisely but widely enough, Methods: the notions of research software and of its authors followed by a study of the evaluation issues, as the basis for the proposition of a sound assessment protocol: the CDUR procedure.CDUR comprises four steps introduced as follows: itation, to Results: C deal with correct RS identification, issemination, to measure good D dissemination practices, se, devoted to the evaluation of usability U aspects, and esearch, to assess the impact of the scientific work. R
Some conclusions and recommendations are finally
Conclusions:included. The evaluation of research is the keystone to boost the evolution of the Open Science policies and practices. It is as well our belief that research software evaluation is a fundamental step to induce better research software practices and, thus, a step towards more efficient science.