Hopefully he's the guy who has the paper prints in his hands & knows how to check the layout to make sure the cute little machine didn't get bumped, slid over, or otherwise knocked off it's path. I know I'd always check the work of something like that. A guy I know would always make his sub-contractors check the laser layout with a transit. they didn't have to redo the whole process, just check a few points, both near & far.