"But he was here just a minute ago..."

If your UE is often late, disappears, no-shows or “just” neglects an important duty, he’s an AWOL.  Typically, when someone goes AWOL, his work piles up, deadlines are missed, and important messages go unanswered.  And The AWOL creates constant low-grade tension, because everyone knows that somebody’s going to have to cover for him, yet again.

What is a manager to do?  Consult The 5Cs, of course.