Salam Characteristic Factors of defects in bolt tightening oke remember 4 M's 1. MAN 2. METHON 3. MACHINE 4. MATERIAL MAN Man or human factors (also known as ergonomics) is the study of how humans behave physically and psychologically in relation to particular environments, products, or services. Many large manufacturing companies have a Human Factors department or hire a consulting firm to study how any major new product will be accepted by the users that it is designed for. A human factors specialist typically has an advanced academic degree in Psychology or has special training. source In Case Making in Characteristic Factors of defects in bolt tightening - Missed Tightening - Improper Tightening tool Usage Next Number Two METHOD methods are the physical actions employed to perform a task. Evaluating and modifying work methods to prevent discomfort and injury is one of several components of an effective ergonomics program. Work meth
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