When I dine at a restaurant, I expect great service. We all know that things can go wrong. The food may be under or overcooked, the temperature may be off, or a serving might be dropped. Anyone can have an off day and make a mistake. If humans were perfect, just imagine how boring sports would be. Some customers tip based on how perfect the wait staff was. But it is more reasonable and fairer to base the amount of the tip on how well the server makes up for what went wrong. E