The environment of postgraduate studies has many challenges and pressures that affect the relationship between supervisor and supervised during the thesis development. A factor that helps a student to successfully complete the thesis is the supervisor's presence in the thesis development process. The postgraduate students follow courses aimed at developing thesis, has completed all postgraduate requirements, however they do not culminate thesis. The purpose of this article is determine the relationship between the supervisor's performance and thesis development according the students perceptions. A survey of 51 students on supervision shows that there is a positive correlation between the supervisor's performance and thesis development. Statistically, the results demonstrate that cognitive skills, personal conditions and function role of supervisor positively correlate with thesis development.