Dilbert Principle info

One way that organizations attempt to avoid this effect is to refrain from promoting a worker until he or she shows the skills and work habits needed to succeed at the next higher job. Thus, a worker is not promoted to managing others if he or she does not already display management abilities.

The first corollary is that employees who are dedicated to their current jobs should not be promoted for their efforts (like Dilbert Principle), for which they might, instead, receive a pay increase.
The second corollary is that employees might be promoted only after being sufficiently trained to the new position. This places the burden of discovering individuals with poor managerial capabilities before (as opposed to after) they are promoted.
Peter pointed out that a class, or caste (social stratification) system is more efficient at avoiding incompetence. Lower-level competent workers will not be promoted above their level of competence as the higher jobs are reserved for members of a higher class. "The prospect of starting near the top of the pyramid will attract to the hierarchy a group of brilliant [higher class] employees who would never have come there at all if they had been forced to start at the bottom". Thus the hierarchies "are more efficient than those of a classless or equalitarian society".

In a similar vein, some real-life organizations recognize that technical people may be very valuable for their skills, but poor managers, and so provide parallel career paths allowing a good technical person to acquire pay and status reserved for management in most organizations.

Pluchino et al. computationally modelled the behavior and tested other promotion strategies. They found that first promoting the most competent then the least, and also promoting randomly avoided the effect.

More Interesting

Along with the Peter Principle, Dr. Peter also coined "hierarchiology" as the social science concerned with the basic principles of hierarchically organized systems in the human society.

Having formulated the Principle, I discovered that I had inadvertently founded a new science, hierarchiology, the study of hierarchies. The term hierarchy was originally used to describe the system of church government by priests graded into ranks. The contemporary meaning includes any organization whose members or employees are arranged in order of rank, grade or class. Hierarchiology, although a relatively recent discipline, appears to have great applicability to the fields of public and private administration.

—Dr. Laurence J. Peter and Raymond Hull, The Peter Principle: Why Things Always Go Wrong