Toward a model of unreliability to study error prevention supports

✍ Scribed by F Vanderhaegen

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 377 KB
• Volume: 11
• Category: Article
• ISSN: 0953-5438
• DOI: 10.1016/s0953-5438(98)00044-7

✦ Synopsis

The paper reviews aspects of system development. It focuses on system specification which aims at defining off-line error prevention supports such as training programme, ergonomic improvement or rules modification and at defining on-line error prevention supports such as assistance tools, automated tools or human-machine interfaces. A model of unreliability is proposed to describe both human and machine dysfunctions and to guide the specification of error prevention supports. One of its uses is illustrated by an application in air traffic control. The project is an experimental feasibility study which aims at assessing the impact of automation on human behaviour. This study consists of sharing tasks dynamically between a human air traffic controller and a computer based tool. Results are analysed in the light of workload, safety and unreliability.