ABSTRACT
Humans make errors, although most of the time these errors are inconsequential with no ill or long term effects. However, in safety-critical systems such as those involved with aircraft operation, human error may have catastrophic effects. Although it is not possible to prevent humans from making mistakes, every attempt must be made when designing systems to minimise the opportunities for human error, and for remedial actions to be carefully planned for easy assimilation and execution by the crew. The point of contact between the flight-deck crew and the aircraft informing them of critical changes in the state of various aircraft systems is usually the warning system. Consequently, special attention needs to be applied to its design in order to accommodate any errors which the crew might make (Billings, 1997).
