Human Performance Engineering a Guide for System Engineers by Robert W. Bailey . When developing your system many of the most critical decisions designers must make are related to human performance. Informed decisions require that designers understand several human performance consideration, including how users sense, process information and respond. Even a series of good design decisions does not insure acceptable human performance. Designers have control over only a portion of the many conditions that govern human performance ( possibly less than fifty percent).
Human Performance Engineering a Guide for System Engineers by Robert W. Bailey