产品特性分级

1 特性分级ClassificationofCharacteristics 分级的定义DefinitionofClasses下列特性分级是根据产品关键程度 QSP1 04图1A进行特性分级 在该定义中的缺陷项目是指偏离QSP1 04图1B中规定的尺寸规范 ThefollowingcharacteristicclassarebasedupontheProductCriticalityClassification Figure1A QSP1 04 ClassificationofCharacteristics ThetermdefectiveinthesedefinitionsreferstoexcursionsfromspecificationofamagnitudedefinedinFigure1B QSP1 04 2 特性分级ClassificationofCharacteristics 关键 关键特性如果有缺陷 将可能引起操作人员 使用者或旁人的人身伤害 符号图 肯定会引起操作运行故障 Drawing 肯定会引起性能下降超过20 或不能满足Symbol法规要求 Critical Thosecharacteristicswhichifdefective Willpossiblycauseinjuretoanoperator userorbystander Willcertainlycauseanoperatingfailure Willcertainlycauseaperformancelossinexcessof20 orfailuretomeetregulatoryrequirementsofEPA CARB ABS UL FM etc 3 特性分级ClassificationofCharacteristics 重要 重要特性如果有缺陷 有很高的可能性会引起运行故障 有很高的可能性会引起性能下降超过20 或不满足法规要求 肯定或很可能引起超额的修理费用包括停机 劳务 备件等 肯定或很可能会由于机器失效引起产品完全报废 明显减少工具的使用寿命或产生过多的废品 Major Thosecharacteristicswhichifdefective Willwithhighprobability Causeanoperatingfailure Willwithhighprobability Causeaperformancelossinexcessof20 orfailuretomeetregulatoryrequirementsofEPS CARB ABS UL FM etc Willcertainlyorwithhighprobability causeexcessivetotalcostofrepairincludingdowntime labor Replacementpart etc Willcertainlyorwithhighprobability causeadisruptionofproductionbycausingamachinemalfunction significantlyreducedtoollifeorexcessivescrape 4 特性分级ClassificationofCharacteristics 一般 一般特性不包含在QSP1 04的产品关键程度分级中 但如果有缺陷根据经验和判断表明 无符号 将肯定会降低产品外观质量 给客户提供劣质品 将肯定会引起额外的工艺调整 清理 返修等 肯定会在产品确认和成品控制时产生困难 Minor ThosecharacteristicsnotincludedinProductCriticalityClassificationofQSP1 04 Butwhichjudgmentandexperienceindicateifdefective Willcertainlydetractfromtheappearanceoftheproductindicatinginferiorvaluetothecustomer Willcertainlyresultinextraprocessadjustments cleaning salvageetc Willcertainlycausedifficultyinidentificationandcontroloftheendproduct 5 特性分级ClassificationofCharacteristics 关键控制特性不管特性级别如何 在生产可接受的零件或产品时 关键控制特性是很重要的 关键控制特性在于特殊的预防控制 KeyControlCharacteristicCharacteristicswhicharemostimportantinproducinganacceptablepartorproduct Regardlessofclassification Focusonspecialpreventionorientedcontrols 6 PPAP检查单PPAPCheckList 零件号和更改级别PartNo Revision在图纸上给尺寸编号Givingnumberstoalldimensionondrawings在尺寸检查表中注明未注尺寸公差值Confirmtoleranceofdimensionswhichnotoleranceondrawing专用工装 模具清单Specialtoolingandmouldlist量检具清单GaugelistFMEA纠正措施的跟踪FollowupthecorrectiveactionsofFMEA工程更改必须经DCEC产品部门批准EngineeringchangesmustbeapprovedbyDCECPEdepartment 7 PPAP检查单PPAPCheckList 尺寸 材料 性能测试项目必须经DCEC预先审核Dimension material performanceitemsshouldbeapprovedbyDCEC过程能力和统计过程数据Processcapabilityandstatisticalpackage分供方清单Partslistforsubcontractors过程能力小于1 33 进行工序质量改进 并有书面改进措施计划Cpkislessthan1 33 improveprocessanddocumentedinacorrectiveactionplan测试的不合格项目须经DCEC审