What are some common performance issues? What is your role as a manager/leader in handling these issues?

Based on answering the above question, how do you answer the Chapter Case Revamping the System (p. 284)?

As the manager of GrocRight, an online grocery delivery service, your span of control is four. You and your team are responsible for marketing the online grocery service. You enjoy your job, but lately you have had some problems with one of your employees, Amiee. She came on your team six months ago and was very enthusiastic, motivated, and had great new ideas for marketing your grocery service. Over the last few months, Amiee has been late to work at least twice per week and has shown up obviously hung over and not able to function. She hardly speaks in team meetings and doesnt seem engaged. You are concerned about Amiee-not only because she is your employee but because you like her as a person.