FMEA培训教材（课件）.ppt

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An analytical tool for identifying Potential Failures in a product or process so that corrective action can be taken
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Timing of an FMEAFMEA的时机
FMEA’s should be initiated when preliminary drawings of the design or process are available
当初步的设计图纸和工艺被制定出来时应开始做FMEA
Updated as identified issues are resolved
当被发现的问题解决后要更新FMEA
Can be used on existing products to improve quality
可用于现有的产品以提高质量
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System系统
Wiring harness
线束
Electronic module
电控模块
Assembly
总成
System FMEA treats system as a“functional schematic”
系统FMEA从“功能关系图”入手来考虑
SFMEA
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An analytical tool used to identify system-level failure modes, and identify corrective actions to be taken.
是一种分析工具用来识别系统失效模式
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It is similar to a Design FMEA, but focuses on the circuit schematic instead of physical failure of components.
同DFMEA相类似, 系统FMEA侧重于回路设计而不是组件的物理失效。
Take electrical systems as examples.
以电气系统为例。
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Example:
举例：
Failure mode at electrical system level
电气系统失效模式
Open circuit at ckt A
回路A出现开路
Cause:
原因：
Terminal unseated
端子脱出
Terminal unseated becomes a failure mode at the component level.
端子脱出 是电气组件的失效模式。
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Rules of Design FMEA设计FMEA规则
Tool for design engineers and project team to improve the design in a preemptive manner (before failure occur)
是设计工程师和项目小组的工具用来提高设计的前瞻性(在问题发生前)
Used to established Critical to Quality features that effect the performance of the product
用与那些影响产品性能的重要质量特性
Used to establish Critical to Life features that effect the life of the product
用于确定影响产品寿命的重要寿命特性
Used to establish Critical to safety features
用于确定重要安全特性
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Purpose of Design FMEA设计FMEA的用途
Establishes critical features that must be controlled in manufacturing to satisfy customer requirements
确定那些必须在生产中进行控制的特性以满足客户要求
Identifies deficiencies in the product design and associated action items
找出产品设计中的不足和相应的措施
Helps evaluate the risk of design changes
帮助评价设计变更的风险
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Purpose of Design FMEA设计FMEA的用途
Identifies process development needs
确定开发工艺流程的需求
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