FMEA介绍绝对经典版19106.ppt

* Define Current Design Controls 5 Minutes Define Current Design Controls FMEA Handbook 47: Type 1: Prevention – Prevent the cause/mechanism or failure mode/effect from occurring, or reduce the rate of occurrence. Type 2: Detection – Detect the cause/mechanism or failure mode, either by analytical or physical methods, before the item is released to production. Must be performed prior to the design being released to production Explain that current design controls might include design reviews, analytical studies, computer model programs, and any specific test done as part of DV Explain the two types of design controls/features to consider (on slide) Re-emphasize point specific to detective controls versus preventative controls FMEA SAE standards state it may be helpful that D or P designations be added behind the controls Example preventive controls: WCR/SDS, design guidelines Example detective controls: fatigue test, mud bath, simulation Use “stowing car jack” to show where current design controls are listed on the FMEA form Note: See Tip on FMEA Handbook 49 * Definition of Detection 2 Minutes Ask participants what is meant by detection? Detection is the rank associated with the best type 2 design control from the list in the previous column. Detection is a relative ranking, within the scope of the individual FMEA. In order to achieve a lower ranking, generally the planned design control (e.g. validation, and/or verification activities) has to be improved. * RPN Example -- 1 2 Minutes Examine three different values of RPN = 200 Ask if they are all of equal risk Discuss why each is different Second item is the worst * Assessing Risk 2 Minutes Explain that when ratings have been assigned and entered into the severity, occurrence and detection columns, actions are then prioritized as follows: An effect of a Failure Mode with Severity rated 9 or 10 (YC Items) For all Severities of 9 or 10 the team must drive to root cause The ranking of the Severity times Occurrenc