ABSTRACT
A system may be defined as a set of parts with the output of the whole greater than the sum of the output from the individual parts. The systems approach is considered to be a formal and systematic set of procedures for systems development. Within this definition, it should be obvious that a system may contain a human component. However, only recently has there been formal acknowledgement that a system is made up of human and equipment components (U.S. DoD I 5000.2 February 1991). Experience in supporting MoD air systems acquisition programs has revealed a number of general problems in procuring systems conforming to good Human Engineering (HE) practice (Taylor, 1987). These problems include:
• HF requirements poorly defined in system specifications.
