I am not always able to maintain a cool head.
Negligence, lack of due dilligence, or concern, or failure to follow my instructions are triggers, but this usually only occurs in the heat of battle, when we are really up against a serious deadline. The rest of the time, I have to engage in a lot of prodding and prompting to get things done, and this distracting and repetitive necessity sets a bad omen for things to come. This constant correction especially on tasks where I instructed and mentord previously raises my blood pressure.
I never usually become angry with anyone who I estimate is doing the best they can. But absent that and it's drill sgt time. I speak very clearly, and my words are unmistakeable, and woe to those that disregard them.
My intention is never to harrass and intimidate, but I AM angry. When I bring in someone new, I explain this to them. We a different people when not under the gun. Some understand, some don't. I simply do not have time for the understanding and instructive approach; I need what I need, and NOW.
Few of my cooks and dishwashers, even after much prodding, can see the big picture of the production day, and instead want to zone out on thier own tasks. This is entirely unhelpful. My job is to bring all those pieces together, and absolute cooperation and total adherance to my wishes are required. I try to bring them in on it, explain things in detail, and it usually does little good.
I'm not going to say that yelling at the help is justified. It's that after all this time, when push comes to shove, it's the only way I know of to get people moving.