The article suggests the use of the Paraconsistent Decision Method (MPD) to improve the analysis of data captured in a standardized SUS-System Usability Scale questionnaire. The paraconsistent evaluation allows you to measure the usability quality of the provider registration software developed on the SalesForce platform. The data obtained through the questionnaire must be processed to be submitted to the Para-analyzer algorithm of The Paraconsistent Annotated Logic Evidential Eτ - Logic Eτ. Logic Eτ is used as a non-classical logic that allows analyzing the opinions of users considering their uncertainties, inaccuracies, ambiguities, and subjectivities that are inherent to human values. Through the Para-analyzer algorithm, we intend to obtain a consensus of the opinions of the experts on the usability of the software. The model with Logic Eτ allows being used in addition to the statistical treatment provided by the SUS method, improving the analysis of the data. With the result of this analysis, it is intended to diagnose usability problems contributing to the improvement of software development.