Augmenting a Hazard Analysis Method with Error Propagation Information for Safety-Critical Systems

Safety-critical system development requires an explicit design to manage component failures and unanticipated conditions of abnormal interaction between system components as hazards that affect the safety and reliability of the system. The potential effects of residual hazards in the operational system context must be reduced to an acceptable level of risk. System reliability focuses on providing continued operational capability in spite of failures. System safety focuses on unsafe conditions because of failures and unpredicted interactions between system components.