Examples of corrective employee feedback include:
"How are things with you at the moment? I wanted to have a chat with you, as I know you are capable of stronger work and I'm really interested to know what you think might be holding you back."
"I wanted to take the time to reiterate to you that your commitment to producing quality work has always been clear. If we can work together to bring your speed up to match, you would be fulfilling your full potential, which i'm sure we both want for you. These are a few things that have helped me in the past, when I have struggled with productivity"
"Is there anything you think you may need better training on to speed up your efficiency?"
"Your sales numbers are rising but I can't help but notice that you don't seem as chuffed as I am. You should be proud of the work you have done, and I think your colleagues would appreciate some of your expertise. I want this team to support and celebrate each others successes, is there any reason you may not feel comfortable to do so? Please be assured that this conversation stays between us and that you can talk to me if you do not feel included in the work culture here."