You paraphrased k pretty well, but you missed my point. I didn't say people can judge their coworker as a whole, just that the information on performance is kno

You paraphrased k pretty well, but you missed my point. I didn't say people can judge their coworker as a whole, just that the information on performance is known to the employees as a whole. Each person in a company know something about the performance of some aspect of each of the colleagues they work with. When taken in aggregate this information provides a very good idea of the ranking of employees by whatever metric you want to choose. The problem is this information is inaccessible to management.