You should spend an average of six hours a week with each employee
Moving from one to six hours weekly contact with the boss increased employee inspiration by 29 percent, but after six hours inspiration actually started to take a hit.
From a study of 30,000 American and Canadian employees, executives and middle managers. The metrics of “good” are things like “inspiration” and NPS. Also, it says you can’t really manage more than seven people. I’ll have to read up more on it.