There were two vacancies for the post of Assistant Manager in ‘Gyan Electrics Private Ltd.’ ‘Parth’ the Human Resources Manager identified one suitable candidate ‘Vishwas’ from within the organization and promoted him to the post of Assistant Manager. For another post, the Manager ‘Parth’ took help of a placement agency and selected ‘Saleem’. After six months, Parth observed that ‘Vishwas’s’ performance was much better than ‘Saleem’s’ performance though ‘Vishwas’ was less qualified than ‘Saleem’. Hence, ‘Parth’ decided that in future he will not make any appointment with the help of an outside source.

Explain any four reasons on the basis of which ‘Parth’ would have taken the above decision.