In any management role you do not only have to oversee that everything in your department runs smoothly regarding systems, but you are also responsible for the performance of your staff.
When targets aren't met and this can be attributed to some of your staff, you probably find yourself asking questions like: Why are they under-performing? How do I get enough action from my team? What do I do when individual achievements are not up to par? How do I keep people motivated and encouraged without dictating what needs to be done? Or is it time to part ways?