One of the most important tasks in my quality control process auditing is monitoring the clean-up of my litter box. It's mostly done by the lady of the house, and she's quite good at it too. This doesn't mean I wouldn't need to follow her work though. I have noticed that it is essential that I sit right next to the litter box during the whole cleaning process. Here's a good example of a decent result:
Nice and clean litter box, and I take some of the credit of the result!