Your business may have multiple locations.  You are located at your corporate headquarters.  You may do a great job of keeping on top of operating costs there.  It is easier when things are right under your nose.  You can see it, you can feel it.  You sense things about operating costs even before they hit the numbers in your dashboards or financials.
Out in the field locations, it could be a different matter.  It may be out of sight, out of mind.  You may not get around as much as you should.  You may not have ways to keep in touch beyond getting the monthly numbers.  When the cat is away, the mice will play.  It may take a crisis to get you there.  By then you have spend a lot more in operating costs.  You missed opportunities to keep the overrun from starting in the first place.
The good work you do on operating costs at headquarters does not translate to the field.  You are lean at home but loose away.   It is like someone who keeps a tight diet and workout routine at home, but cuts loose on the road.  He eats more and exercises less.