The 'trouble not identified' phenomenon in automotive electronics

摘要

In some cases, a failure occurs that cannot be verified, replicated at will, or attributed to a specific failure site, mode, and mechanism. Terms used to describe this phenomenon include trouble not identified (TNI), no trouble found (NTF), cannot duplicate (CND), 're-test ok' (RTOK), no-fault found (NFF), and intermittent malfunctions. This paper discusses the concept, causes, and impact of the "trouble not identified" phenomenon on the automotive Electronics inducstry. A case study is presented to clarify the issues.