35 citations · 94 across the 18 of their papers we have counts for
5 papers · 1 filter
Defeater Cards: Characterizing and Managing Safety Assurance Case Defeaters
Usman Gohar, Michael C. Hunter, Salil Purandare +3
Safety assurance cases provide structured justifications that safety-critical systems meet their safety requirements. Recently, the notion of defeaters has emerged as a rigorous me…
A Family-Based Approach to Safety Cases for Controlled Airspaces in Small Uncrewed Aerial Systems
Michael C. Hunter, Usman Gohar, Myra B. Cohen +2
As small Uncrewed Aircraft Systems (sUAS) increasingly operate in the national airspace, safety concerns arise due to a corresponding rise in reported airspace violations and incid…
A Taxonomy of Real-World Defeaters in Safety Assurance Cases
Usman Gohar, Michael C. Hunter, Myra B. Cohen +1
The rise of cyber-physical systems in safety-critical domains calls for robust risk-evaluation frameworks. Assurance cases, often required by regulatory bodies, are a structured ap…
CoDefeater: Using LLMs To Find Defeaters in Assurance Cases
Usman Gohar, Michael C. Hunter, Robyn R. Lutz +1
Constructing assurance cases is a widely used, and sometimes required, process toward demonstrating that safety-critical systems will operate safely in their planned environment. T…
Towards Engineering Fair and Equitable Software Systems for Managing Low-Altitude Airspace Authorizations
Usman Gohar, Michael C. Hunter, Agnieszka Marczak-Czajka +3
Small Unmanned Aircraft Systems (sUAS) have gained widespread adoption across a diverse range of applications. This has introduced operational complexities within shared airspaces…