This article seeks to bring together in a single document the set of issues surrounding the definition and implementation of mechanisms and criteria relating to the evaluation of scientific research. It revisits and orders the basic agreements regarding their defects and the proposals for countering them based on a bibliographical review revolving around three questions: who participates in the assessment; how the assessment is carried out; and what is to be evaluated. Finally, it briefly presents some notes referring to the specific literature generated from Latin America, highlighting the limited space dedicated to this topic until now.