This is the PAEI model which is from the 1970s. People are either Producer, Administrator, Entrepreneur, or Integrator. It's a scale from E to P to I to A in

This is the PAEI model which is from the 1970s. People are either Producer, Administrator, Entrepreneur, or Integrator. It's a scale from E to P to I to A in order of early to late in the company lifecycle. There are even personality tests for this online.