Mr. Mark McSherry:

One has to learn from one’s mistakes.

If you own a company, it will not go your way all the time but the company will be making money. If someone messes up, the company is fit to put that money back in, sit the person down and show him or her how to do it right. I know from experience that when people do things wrong, they sometimes get the head eaten off them. The foreman or someone else gets on the phone to the boss to give out about your man, who is then docked his day's wage or whatever. He might leave the job because that tips him over the edge. Instead of taking that approach, one should just sit the person down, explain how to do it and promise to keep an eye out for the next time.