It’s frustrating when a member of your team has mentally checked out. In some cases, this person does only the bare minimum. In other cases, they fail to meet important deadlines, or they drop the ball on critical projects. How can you determine what’s going on? What can you do to address the issue when it’s a temporary slump? How about when it’s a long-term problem? And what’s the best way to ensure this person’s lack of motivation doesn’t influence or annoy your other team members?