Proxy Oriented Approach for Evaluating Usability of a Resilient Life-Critical Interactive Systems

Resilience deals with the system capacity to adjust itself to face unexpected events by ensuring four activities that are: anticipation, monitoring, response and adaptation. In this work, we focus especially on how monitoring is a potential strategy to anticipate unexpected situations for enhancing resilience. We propose a solution for monitoring human-system interaction based on continuous, automatic and real-time model-based usability evaluation. The proposed monitoring proxy tool is able to log user activities, using Petri Net language, while interacting with the human-machine system. The identification of usability issues is carried out through detecting any deviation from what task model assumes comparing to user activities. This approach has been defined and applied using a simple case study: an automated speed control car system.