24/7 Operational Effectiveness Toolset: Mishap Investigation Interface

摘要

This report describes the Mishap Investigation Interface of the 24/7 Operational Toolset, a World Wide Web-based fatigue analysis software product. The toolset was based upon the Sleep, Activity, Fatigue, and Task Effectiveness (SAFTE(Trademarked) Hursh et al., 2004). The SAFTE(Trademarked) model predicts cognitive performance level based upon sleep, circadian rhythm, and sleep inertia. This specific interface of the toolset was designed to aid in the determination of whether aviation and ground mishaps may have causes rooted in or exacerbated by mental fatigue. The interface design approach was iterative, involving several meetings among subject matter experts (SMEs), interface software designers and evaluators. The first meeting was for the purpose of requirements analysis, in which the designers elicited task information from the SMEs. The second meeting included a walk-through of storyboarded and preliminary software, in which the SMEs provided feedback to the designers and evaluators. The final meeting was for the purpose of an 'inspection evaluation' of the interface by the SMEs and evaluators. This interface was based upon task analyses of mishap investigators who also served as our SMEs. The requirements analysis revealed how fatigue related information is entered into the report of an Air Force Safety Investigation Board. A task analysis revealed how safety investigators accomplish their investigation. The report begins with a general review of mishap investigation and proceeds to the roles played by our SMEs in determining the effects of fatigue. The walk-through and inspection evaluation processes indicated that most of the requirements of potential users were met reasonably well and that potential users were able to operate the interface reasonably easily. The report ends with recommendations and suggestions for incorporating a fatigue-assessment decision aid into the mishap investigation process.