safety-critical

safety-critical (comparative more safety-critical, superlative most safety-critical)

1. Of a system: capable of causing serious injury or damage if it fails or malfunctions.
   • 2020 April 8, “Network News: UK train production stops but depots remain open for servicing”, in Rail, page 12:

     In a statement, the company said: "Our colleagues in Product Introduction, Test and Validation and at our train production site are on controlled 'standby' with a number of safety-critical, warehouse, production and security colleagues working in person at the factory, allowing us to restart production at short notice."

• life-critical

• “safety-critical”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.