Some procedures are impossible for human beings to follow with high nines levels of accuracy. (Look at attention blindness, for example.) All that is done with

Some procedures are impossible for human beings to follow with high nines levels of accuracy. (Look at attention blindness, for example.) All that is done with harsh punishment in such cases is damage to morale. Or worse, it causes people to think they have "fixed" the problem when they have in fact done no such thing. The solution is to _change the process_ so that it can achieve the desired level of accuracy.