Ifir: initial market defective rate; fir: market defective rate; afr: annual repair rate; arr: annual recovery rate; The above are indicators of after-sales/market services. Ifir initial field incident rate Initial (30 days) market withdrawal defective rate iqc incoming quality control jqe joint quality engineer quality contact engineer mtbf mean time between failures average failure time. How to improve production line yield? How to do lrr, vrr, vlrr? I used to do supplier management, let me give you some basic information 1. cit - customer incidents tracking log, customer complaint tracking report l cit definition: cit is for.
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