1. Each person possesses a unique and stable pattern of traits that can be
measured.
2. There is a unique pattern of traits required for successful performance of
the critical tasks of each occupation.
3. It is possible to match the traits of persons with the trait requirements
of occupations on a rational and actuarial basis.
4. The closer the fit between a person's traits and the trait requirements of
that person's occupation, the greater the likelihood for successful job
performance and personal satisfaction (Klein & Weiner, 1977).