This study aims to describe the construction process of an evaluation instrument to measure the self-perception of students, professors and employees, under several aspects of the academic routine of a university. The starting-point was a pilot instrument, with a five-point Likert scale, based on the suitable dimensions for the National System of Evaluation of the Higher Education. Psychometric studies of factor analysis and precision instrument pointed to differences concerning the students', the professors' and the employees' points of view. The data was then divided into three databanks and went through new analysis, which resulted in two consistent scales for professors and students, as the coherence and consistency of the study and the proper interpretation of the factors show. The impossibility of creating an employees' scale showed a failure in the construction of the items and required new procedures.