【文章內(nèi)容簡介】 A p o r t i o n ( l e ss t h a n 1 0 0 % ) m a y h a v e t o b escr a p p e d ( n o so r t i n g ) . V e h i cl e / i t e m o p e r a b l e , b u t so m e co m f o r t / co n v e n i e n cei t e m ( s) i n o p e r a b l e . C u st o m e r s e x p e r i e n ce d i sco m f o r t .6LowM i n o r d i sr u p t i o n t o p r o d u ct i o n l i n e . 1 0 0 % o f p r o d u ct m a y h a v e t o b e r e w o r ke d .V e h i cl e / i t e m o p e r a b l e , b u t so m e co m f o r t / co n v e n i e n ce i t e m ( s) o p e r a b l e a tr e d u ce d l e v e l o f p e r f o r m a n ce . C u st o m e r e x p e r i e n ce s so m e d i ssa t i sf a ct i o n .5V e r y L o wM i n o r d i sr u p t i o n t o p r o d u ct i o n l i n e . T h e p r o d u ct m a y h a v e t o b e so r t e d a n d ap o r t i o n ( l e ss t h a n 1 0 0 % ) r e w o r ke d . F i t / f i n i sh / sq u e a k / r a t t l e i t e m d o e s n o tco n f o r m . D e f e ct n o t i ce d b y m o st cu st o m e r s.4M i n o rM i n o r d i sr u p t i o n t o p r o d u ct i o n l i n e . A p o r t i o n ( l e ss t h a n 1 0 0 % ) o f t h e p r o d u ct m a yh a v e t o b e r e w o r ke d o n l i n e b u t o u t o f st a t i o n . F i t / f i n i sh / sq u e a k / r a t t l e i t e md o e s n o t co n f o r m . D e f e ct n o t i ce d b y a v e r a g e cu st o m e r s.3V e r y M i n o rM i n o r d i sr u p t i o n t o p r o d u ct i o n l i n e . A p o r t i o n ( l e ss t h a n 1 0 0 % ) o f t h e p r o d u ct m a yh a v e t o b e r e w o r ke d o n l i n e b u t i n st a t i o n . F i t / f i n i sh / sq u e a k / r a t t l e i t e m d o e sn o t co n f o r m . D e f e ct n o t i ce d b y d i scr i m i n a t i n g cu st o m e r s.2N o n e N o e f f e ct . 1Severity Occurance P r o b a b i l i t y o f F a i l u r e P o ssi b l e F a i l u r e R a t e s C p k R a n ki n gV e r y H i g h : ? ?? 1 i n 2 0 . 3 3 10F a i l u r e i s a l m o st i n e v i t a b l e 1 i n 3 ? ?? 0 . 3 3 9H i g h : G e n e r a l l y a sso ci a t e d w i t hp r o ce sse s si m i l a r t o p r e v i o u s1 i n 8 ? ?? 0 . 5 1 8p r o ce sse s t h a t h a v e o f t e n f a i l e d 1 i n 2 0 ? ?? 0 . 6 7 7M o d e r a t e : G e n e r a l l y a sso ci a t e dw i t h p r o ce sse s si m i l a r t o1 i n 8 0 ? ?? 0 . 8 3 6p r e v i o u s p r o ce sse s w h i ch h a v e 1 i n 4 0 0 ? ?? 1 . 0 0 5e x p e r i e n ce d o cca si o n a l f a i l u r e s,b u t n o t i n m a j o r p r o p o r t i o n s1 i n 2 , 0 0 0 ? ?? 1 . 1 7 4L o w : I so l a t e d f a i l u r e s a sso ci a t e dw i t h si m i l a r p r o ce sse s1 i n 1 5 , 0 0 0 ? ?? 1 . 3 3 3V e r y L o w : O n l y i so l a t e d f a i l u r e sa sso ci a t e d w i t h a l m o st i d e n t i ca lp r o ce sse s1 i n 1 5 0 , 0 0 0 ? ?? 1 . 5 2R e m o t e : F a i l u r e i s u n l i ke l y . N of a i l u r e s e v e r a sso ci a t e d w i t ha l m o st i d e n t i ca l p r o ce sse s? ?? 1 i n 1 , 5 0 0 , 0 0 0 ? ?? 1 . 6 7 1Detection D e t e c t i o n C r i t e r i a : L i k l i h o o d t h e e x i s t e n c e o f a d e f e c t w i l l b ed e t e c t e d b y t e s t c o n t e n t b e f o r e p r o d u c t a d v a n c e s t on e x t o r s u b s e q u e n t p r o c e s sR a n k i n gA l m o s t I m p o s s i b l e T e s t c o n t e n t d e t e c t s 8 0 % o f f a i l u r e s 10V e r y R e m o t e T e s t c o n t e n t m u s t d e t e c t 8 0 % o f f a i l u r e s 9R e m o t e T e s t c o n t e n t m u s t d e t e c t 8 2 . 5 % o f f a i l u r e s 8V e r y L o w T e s t c o n t e n t m u s t d e t e c t 8 5 % o f f a i l u r e s 7Low T e s t c o n t e n t m u s t d e t e c t 8 7 . 5 % o f f a i l u r e s 6M o d e r a t e T e s t c o n t e n t m u s t d e t e c t 9 0 % o f f a i l u r e s 5M o d e r a t e l y H i g h T e s t c o n t e n t m u s t d e t e c t 9 2 . 5 % o f f a i l u r e s 4H i g h T e s t c o n t e n t m u s t d e t e c t 9 5 % o f f a i l u r e s 3V e r y H i g h T e s t c o n t e n t m u s t d e t e c t 9 7 . 5 % o f f a i l u r e s 2A l m o s t C e r t a i n T e s t c o n t e n t m u s t d e t e c t 9 9 . 5 % o f f a i l u r e s 1It is conducted on a timely basis and It is applied by a product team and Its results are documented FMEA is Most Effective When What Is A Good Application? Involve new technology Have changed from previous Are chronically in trouble Have a high degree of operator control Have a high degree of variation Choose designs or processes which . . . FMEA Process Manufacturing Engineer Buyer Process Operator Previous Experience Chronic Problems Reliability Engineer Process Functions, Potential Failure Modes Effects, Causes, Current Controls Action Priority Actions to Eliminate or Reduce Failure Mode Basic Steps 1. Develop a Strategy S T 9 1 2 6 0 AD R I V EB A S E S U BS Y S T E M F I R M W A R E C O V E RM E D I AD I S C P A C KF I N A L A R MA R M S U BA R M C O I LB O B B I NR O T . A R MS P . F L E X S P I N D L ES T A T O RR O T O RH D A A S S E M B L YB A S E D E C KR E C I R F I L T E RB R E A T H .