at the company i work for, we keep track of the work we're doing by using job numbers. basically, when we do work under a specific project for a specific company, we post it to the corresponding job number. ex: engine design, for Plane Company, J#2222
take a gander at the last job number entry.
i'm not sure if i should be more concerned with what mistakes were made, or that there were so many of them that it actually requires a job number.