Safety≠ Reliability Accidents in high-tech systems are changing their nature, and we must change our approaches to safety accordingly Confusing Safety and reliability From an FAA report on ATC software architectures The faas en route automation meets the criteria for consideration as a safety -critical system. Therefore en route automation systems must posses ultra-high reliability From a blue ribbon panel report on the V-22 Osprey problems Safety [software] Recommendation: Improve reliability, then verify by extensive test/fix/test in challenging environmentsc ￾✂✁✂✄☎✁✂✆☎✝✂✞✠✟☛✡✂✘ ✳✢✂✴✁✂✜✵✣✄☎✆✷✶✂✥✧✁✂✕ ✦✢✂✔✂✦ ✕ ✦✜✵ . . Safety Reliability Accidents in high−tech systems are changing their nature, and we must change our approaches to safety accordingly. . . c ￾✂✁✂✄☎✁✂✆☎✝✂✞✠✟☛✡✂✗ ✳✢✂✴✁✂✜✵✣✄☎✆✷✶✂✥✧✁✂✕ ✦✢✂✔✂✦ ✕ ✦✜✵ Confusing Safety and Reliability From an FAA report on ATC software architectures: "The FAA’s en route automation meets the criteria for consideration as a safety−critical system. Therefore, en route automation systems must posses ultra−high reliability." From a blue ribbon panel report on the V−22 Osprey problems: "Safety [software]: ... Recommendation: Improve reliability, then verify by extensive test/fix/test in challenging environments