Like anything else in life, CYA is the name of the game! If you've ever been short changed at the store and caught it by counting your change before you walk away, you'll know what I mean. Whose to say your parts replenishment was correct? Whose to say that some desk weenie in data input forgot to enter the part on line 7 that was used off your van or worse the whole ticket got lost in the shuffle and ALL the parts you used on that ticket are still showing as unused and still on your van. Then your review comes around along with the required parts inventory check and you come up $800 short on parts. What do you think your review is going to look like. I repeat, CYA is the name of the game!