The critical steps of a work task are just that – critical. They are distinct from important steps and can cause immediate injury if not properly executed. If you research the definition of a critical step in relation to human performance, you will find that it is a human action that will trigger immediate, irreversible, and intolerable harm to a person or asset if that action or a preceding action is improperly performed. In other words, it’s basically the point of no return once the action is performed. On the other hand, many actions that you may need to take leading up to a critical step are important and should be recognized as such. Some examples of important steps include preparing for a task, verifying proper equipment to be worked on and selecting materials.