You cannot because it’s so easy or mistakes are unacceptable?
Fireworks manufacturer
The team who paints the lines on the highways
Site surveyors can really fuck up a job site quick. On one job a few years ago the layout surveyor missed an email with updated footing locations which lead to 13 of the 18 columns being placed an average of 3 feet off. It wasn’t until the masons showed up to start laying block that anyone realized they were wrong. So a few weeks of labor and all that wasted concrete and rebar led to a $600,000 fuck up.
I’m sure there are dentists who have made mistakes, but I always hope it isn’t me in the chair when it happens.