Thorough applications of the MORT (Management Oversight and Risk Tree) system of loss substandard physical condition exists for nearly every substandard practice in accident causation. A vast number of these conditions involve poor ergonomic design of machines , equipment and the work environment. Safety leaders recognize that many of these conditions would not be easily recognized by the supervisory investigation .Those who review investigation reports and engineers who design the machines and the workplace must be ever mindful of these facts.