Some common ways of addressing a performance problem in the workplace:
Pretending that it constitutes good performance.
Lowering standards so it is good performance.
Reassigning the employee causing the problem.
Promoting the employee causing the problem.
Calling HR and telling them you want to get rid of the poor performer.
Apologizing to HR for giving the poor performer "Meets Standards" performance evaluations.
Telling hiring managers in other departments that you're worried someone else is going to lure that dynamo away from you.