If you have really clear KPIs that you can show how he is lower than the defined standard, him seeing the numbers is all that is needed. Hold up a mirror to his performance and hold him accountable or higher performing staff are going to start seeing that you tolerate mediocre work.
If you have really clear KPIs that you can show how he is lower than the defined standard, him seeing the numbers is all that is needed. Hold up a mirror to his performance and hold him accountable or higher performing staff are going to start seeing that you tolerate mediocre work.