failsoft; graceful degradation
A computing term for a system that continues limited operation after a failure, rather than stopping completely.
This server adopts a failsoft design, so it can continue service even if some components fail.
フェイルソフト is the direct katakana loanword for 'failsoft', while 機能縮退 is a native Japanese compound with the same meaning, often used in technical documentation.
Compound of 機能 (function) and 縮退 (degeneration, degradation), likely coined as a technical translation of 'failsoft' or 'graceful degradation'.