FMEA严重性评估参考标准中英文.docx

1、FMEA严重性评估参考标准中英文Suggested FMEA Severity Evaluation CriteriaFMEA严重性评估参考标准Effect后果Criteria: Severity of Effect标准：后果严重性This ranking results when a potential failure mode results in a final customer and/or a manufacturing/assembly plant defect. The final customer should always be considered first. If bo

2、th occur, use the higher of the two severities.此评分因潜在缺陷模式导致最终客户和/或一种制作/安装缺陷而产生。通常会首先考虑最终客户。如果两者均有，采用其中较严重者。(Customer Effect) （客户的后果）Criteria: Severity of Effect标准：后果严重性This ranking results when a potential failure mode results in a final customer and/or a manufacturing/assembly plant defect. The fin

3、al customer should always be considered first. If both occur, use the higher of the two severities.此评分因潜在缺陷模式导致最终客户和/或一种制作/安装缺陷而产生。通常会首先考虑最终客户。如果两者均有，采用其中较严重者。(Manufacturing / Assembly Effect)（制作 / 装配后果）Ranking评分Hazardous without warning无预兆性危险Failure mode affects safe vehicle operation, cause some f

4、unctional and reliable problems of operation / or involves noncompliance with government regulation without warning缺陷模式在无警告的情况下影响产品的安全操作、给用户造成操作不便及可靠性问题 /不符合政府条文，严重性非常高May endanger operator (machine or assembly) without warning无警告的情况下危害操作者（机器或装配）10Hazardous with warning有预兆性危险Failure mode affects saf

5、e vehicle operation and cause some functional problem at the end user / or involves noncompliance with government regulation with warning缺陷模式在有警告的情况下影响产品的安全操作、在最终用户处引起功能上的问题 /不符合政府条文May endanger operator (machine or assembly) with warning有警告的情况下危害操作者（机器或装配）9Very high非常严重Vehicle / item inoperable(los

6、s of primary function)产品不可用（失去基本功能）100% of product have to be scrapped, or repair time exceeds one hour100%的产品可能需要报废或修理时间超过一小时8High严重Vehicle / item operable but at a reduced level of performance. Customer very dissatisfied产品性能下降、客户非常不满Product have to be sorted and a portion (less than 100%) scrapped

7、, or repaired time between one and half an hour产品须分检且部分（非全部）需报废、修理时间在半小时至一小时间7Moderate中等Vehicle / item operable but comfort / convenience items inoperable. Customer dissatisfied产品可使用但使用不便，客户不满A portion (less than 100%) of the product have to scrapped with no sorting, repair time less than one hour部分

8、产品需报废，不需分检，修理时间小于一小时6Low低Vehicle / item operable but comfort / convenience items operable at a reduced level of performance产品可使用且使用不便、表现不良100% of product may have to be reworked,产品可能需全部返工5Very low很低Item normal performance through being repaired. Defect noticed by most customers (greater than 75%)产品经

9、过修理表现正常 / 大部分客户发现缺陷（超过75%）Product may have to be sorted, with no scrap and a portion (less than 100%) reworked产品经过分检，无报废、部分须返工（不到100%）4Minor轻微Item operable and does not conform. Defect noticed by 50% of customers.产品表现正常但使用不便/ 50%客户发现缺陷A portion (less than 100%) of the product may have to be reworked

10、, with no scrap, on-line but out-of-station部分产品（不到100%）需要返工，无报废在生产线上其它工序返工3Very minor细微Normal performance. Defect noticed by discriminating customers (less than 25%)产品表现正常且可使用，有辩别力的客户（不到25%）发现缺陷A portion (less than 100%) of the product may have to be reworked, with no scrap, on-line but out-of-stati

11、on部分产品（不到100%）需要返工，无报废在生产线上原工序返工2None无No discernible effect无辩别的影响Slight inconvenience to operation, no effect轻微操作不便，无影响1FMEA Occurrence Evaluation CriteriaFMEA机率性评估参考标准Level级别Probability可能性Likely Failure Rates可能出现的缺陷机率 (DPPM)以一百万块板里的缺陷数计（DPPM）PpkRanking评分Very high非常高Persistent failures缺陷持续不断100 per

12、thousand pieces500001000000.551050 per thousand pieces20000500000.559High高Frequent failures缺陷频繁出现20 per thousand pieces10000200000.78810 per thousand pieces5000100000.867Moderate中等Occasional failures缺陷偶尔出现5 per thousand pieces200050000.9462 per thousand pieces100020001.0051 per thousand pieces500100

13、01.104Low低Relatively few failures缺陷相对较少0.5 per thousand pieces1005001.2030.1 per thousand pieces101001.302Remote几乎不会Failure is unlikely缺陷基本不可能出现0.01 per thousand pieces1101.671缺陷机率简算：1、假设抽检板数量共58000块，发现缺陷板数量116块；2、计算缺陷板数量在总抽检板数量里所占比例： = 11658000 = 0.002，即0.2%；3、缺陷机率即缺陷的百万分率（DPPM）= 0.2%100,0000 = 200

14、；4、核对机率性评估参考标准：缺陷机率200介于100500之间，故机率性评分为3分；Suggested FMEA Detection Evaluation CriteriaFMEA检测性评估参考标准Detection检测性Criteria标准Inspection types检测种类Suggested range of detection methods检测方法的建议范围Ranking评分Error-proofed防错Gauging量具Manual Inspection人工（手动）检测Almost impossible几乎不可能Absolute certainty of non-detecti

15、on绝对不能检测Cannot detect or is not checked不能检测或没有检测10Very remote很微小Controls will probably not detect控制方法可能检测不出Control is achieved with indirect or random checks only只能通过间接或随机检查来控制9Remote微小Controls have poorchance of detection控制检测机会少Control is achieved with visual inspection only只能通过目视检测来控制8Very low很小Co

16、ntrols have poorchance of detection检测缺陷及防止漏波机会少Control is achieved with double visual inspection only只能通过双重目视检测来控制7Low小Controls may detect控制可能检测出Control is achieved with charting methods, such as SPC用控制图方法控制（如SPC）6Moderate普通Controls may detect控制可能检测出Control is based on variable gauging after parts h

17、ave left the station, or GO/NO go gauging performed on 100% of the parts after parts have left the station在产品进入下工序后进行抽样测量来控制缺陷或在产品进入下工序后对产品百分百测量/不测量来控制缺陷5Moderately high较高Controls have a good chance to detect控制有较多检测机会Error detection in subsequent operations, or gauging performed on setup and first-p

18、iece check (for setup causes only)在下工序的误差检测，或在准备生产时进行测量及首板检查（仅由设置引起）4High高Controls have a good chance to detect控制有很多检测机会Error detection in-station, or error detection in subsequent operations by multiple layers of acceptance: supply, select, install, verify. Cannot accept discrepant part在本工序的误差检测，或利

19、用多层验收后在下工序进行误差检测，供应，选择，安装，确认，不接受不合格产品3Very high很高Controls almost certain to detect控制几乎肯定能检测出Error detection in-station (automatic gauging with automatic stop feature). Cannot pass discrepant part在本工序上的误差检测（自动测量并自动停机），不合格产品不能通过2Very high极高Controls certain to detect肯定能检测出Discrepant parts cannot be made because item has been error-proofed by process / product design由于相关项目已通过流程/产品设计采用了防错措施，不可能出现不合格品1