Control the outcomes of a system. By being able to understand the relationships between the variables and the prediction of future events, this information can be used to control outcomes from the system that are desirable by manipulating the involved variables. Loosely, the term ergonomics is applied to all interactions between human and environment. For many years, the 2 terms were used interchangably. However, over the last several years the term Ergonomics has come to refer to design with respect to physical human characteristics, while Human Factors refers to consideration of human cognitive characteristics in design.
Administrative controls are changes that are made by management.
These changes could include training, job rotation, and incentives. Engineering controls are changes made to equipment. These changes could include guard improvement, sound dampening, or automation. The technician operated the computer that controlled the X-ray machine. The machine needed to have the information input manually as to what type of beam to generate a lower grade e beam or a higher grade x beam.