Hello everyone! I'm new on the forum. I have an interest in trying to discover the "average" spoilage rate for optical labs only, in regards to accidental scratching lenses and/or frames with your tools. (Screwdrivers, etc.) The reason is because I'm trying to design a bench tool that will drastically reduce spoilage rates due to scratches as well as reducing stabbing yourself with tools. I realize that many labs don't break down their spoilage rates between the different possible reasons, so any "best guess" would satisfy me! And to put the spoilage rates in perspective, please include how many jobs are done on an average day.

Thank you in advance!