The objective of the research is focused on the understanding of the effect of the improvement plans executed by the accreditation of Engineering careers under the SINEACE model in the perception of quality of the university service by using the Net Promoter Score as an indicator. An exploratory study was carried out in four consecutive years, which evidenced the satisfaction of educational quality by the students, before and after the accreditation process. The results obtained allow us to affirm that there was a significant increase in student satisfaction (P-value = 0.017), being possible to conclude that there is an effect of the processes implemented under the model of career accreditation and the satisfaction of students on academic quality.