I used to work in a place that assembled machines based on old designs that rarely got reviewed, since if it ain't broke don't fix it. When working on one part

I used to work in a place that assembled machines based on old designs that rarely got reviewed, since if it ain't broke don't fix it. When working on one particular unit, I found that they would order a bunch of plastic panels, cut to size, and some with precut holes. And others with secondary drawings, instructing us how to drill out a bunch of holes ourselves. Sometimes not even all the holes, just a few, in addition to the precut. When I asked why we didn't just ask the supplier to cut out ALL the holes, I basically got a shrug. So I merged the secondary drawings and sent them to the supplier, and the assembly team never wasted time on that nonsense again.