My employee is bad at his job but keeps saying he’s doing great

Inc.com columnist Alison Green answers questions about workplace and management issues—everything from how to deal with a micromanaging boss to how to talk to someone on your team about body odor. A reader asks: I recently hired a new administrative employee. His job is to answer phones, greet guests, and complete various tasks I assign to him. His customer service skills are strong, but his attention to detail is very weak. I have given him a lot of feedback and training, but...