More often, though, errors of execution occur when work processes do not adequately account for human limitations and characteristics. Now for some definitions. Mistakes and calculated risks occur when we evaluate a situation and decide how to act. New hires make mistakes when they don't know the safe way to perform a task, or when they don't understand the need for special precautions. They take calculated risks supported by supervisors or coworkers.
Experienced workers make mistakes by taking safety for granted.
Their skills encourage taking calculated risks, as does their knowledge that soon and certain benefits outweigh improbable costs. Capture errors occur when our actions seem dictated by familiar routines. You borrow someone's pen and put it in your own pocket because that's what you always do with pens. Or you start a new task at work and find yourself using old habits. This is one reason to get in the habit of practicing the safe way of doing something, regardless of the situation.