fmea tables

7/21/2019 FMEA Tables

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MQS/F 1

FMEA RATING TABLESFMEA RATING TABLES



MQS/F 2

Design FMEA : Severity of Effect

Effect Criteria RankingHazardouswithoutwarning

Very high severity raning when a !otentia" #ai"ure $odea##e%ts sa#e vehi%"e o!eration and & or invo"ves non%o$!"ian%ewith govern$ent regu"ation without warning'

10

Hazardouswith warning

Very high severity raning when a !otentia" #ai"ure $odea##e%ts sa#e vehi%"e o!eration and & or invo"ves non%o$!"ian%ewith govern$ent regu"ation with warning'

9

Very High Vehi%"e & ite$ ino!era("e) with "oss o# !ri$ary #un%tion' 8

High Vehi%"e & ite$ o!era("e) (ut at redu%ed "eve" o# !er#or$an%e'*usto$er very dissatis#ied'

7

Moderate Vehi%"e & ite$ o!era("e) (ut *o$#ort & *onvenien%e ite$+s,ino!era("e' *usto$er dissatis#ied

6

Low Vehi%"e & ite$ o!era("e) (ut *o$#ort & *onvenien%e ite$+s,o!era("e at redu%ed "eve" o# !er#or$an%e' *usto$er e-!erien%es so$e dissatis#a%tion'

5

Very Low Fit . Finish & S/uea . Ratt"e ite$ does not %on#or$' 0e#e%t

noti%ed (y $ost %usto$ers'

Minor Fit . Finish & S/uea . Ratt"e ite$ does not %on#or$' 0e#e%tnoti%ed (y average %usto$ers'

!

Very Minor Fit . Finish & S/uea . Ratt"e ite$ does not %on#or$' 0e#e%tnoti%ed (y dis%ri$inating %usto$ers'

"

None No e##e%t' 1

DFMEA Severity DFMEA Severity



MQS/F 3

DFMEA OccurrenceDFMEA Occurrence

DFMEA Occurrence Evaluation Criteria

#ro$a$i%ity of Fai%&re #ossi$%e Fai%&re Rates Ranking

Very High1 2ersistent Fai"ures 3&4 566 !er thousand vehi%"es& ite$s 56

76 !er thousand vehi%"es & ite$s 8

High1 Fre/uent Fai"ures 96 !er thousand vehi%"es & ite$s :

56 !er thousand vehi%"e & ite$s ;

Moderate1 <%%asiona" Fai"ures 7 !er thousand vehi%"e & ite$s =

9 !er thousand vehi%"e & ite$s 7

5 !er thousand vehi%"e & ite$s >

Low1 Re"ative"y Few Fai"ures 6'7 !er thousand vehi%"e & ite$s ?

6'5 !er thousand vehi%"e & ite$s 9

Re$ote1 Fai"ure is un"ie"y @&4 6'65 !er thousand vehi%"e & ite$s 5



MQS/F 4

DFMEA DetectionDFMEA Detection

Design FMEA : 'ike%y(oo) of Detection $y Design Contro% Detection Criteria Ranking

A(so"ute

n%ertainty

0esign *ontro" wi"" not and & or %an not dete%t a !otentia" %ause &

$e%hanis$ and su(se/uent #ai"ure $ode or there is no 0esign

*ontro"

56

Very Re$ote Very re$ote %han%e the 0esign *ontro" wi"" dete%t a !otentia"

%ause & $e%hanis$ and su(se/uent #ai"ure $ode

8

Re$ote Re$ote %han%e the 0esign *ontro" wi"" dete%t a !otentia" %ause &

$e%hanis$ and su(se/uent #ai"ure $ode

:

Very Low Very "ow %han%e the 0esign *ontro" wi"" dete%t a !otentia" %ause &


;

Low Low %han%e the 0esign *ontro" wi"" dete%t a !otentia" %ause &


=

Moderate Moderate %han%e the 0esign *ontro" wi"" dete%t a !otentia" %ause &


7

Moderate"y

High

Moderate"y high %han%e the 0esign *ontro" wi"" dete%t a !otentia"

%ause & $e%hanis$ and su(se/uent #ai"ure $ode

>

High High %han%e the 0esign *ontro" wi"" dete%t a !otentia" %ause &


?

Very High Very high %han%e the 0esign *ontro" wi"" dete%t a !otentia" %ause &


9

A"$ost

*ertain

0esign *ontro" wi"" a"$ost %ertain"y dete%t a !otentia" %ause &


5



MQS/F 5

2FMEA 12FMEA 1 Severity Rating TableSeverity Rating Table

E##e%t Criteria: Severity of Effect

This raning resu"ts when a!otentia" #ai"ure $ode resu"ts

in a #ina" %usto$er and&or a

$anu#a%turing&asse$("y !"antde#e%t' The #ina" %usto$er shou"d a"ways (e %onsidered#irst' I# (oth o%%ur) use the

higher o# the two severities'

*C&sto+er Effect,

Criteria: Severity of Effect

This raning resu"ts when a !otentia"#ai"ure $ode resu"ts in a #ina" %usto$er

and&or a $anu#a%turing&asse$("y !"ant

de#e%t' The #ina" %usto$er shou"d a"ways(e %onsidered #irst' I# (oth o%%ur) use thehigher o# the two severities'*Man&fact&ring-Asse+$%y Effect,

Raning

Hazardous

withoutwarning

Very high severity raning

when a !otentia" #ai"ure $odea##e%ts sa#e vehi%"e o!erationand&or invo"vesnon%o$!"ian%e with

govern$ent regu"ationwithout warning

<r $ay endanger o!erator +$a%hine or

asse$("y,without warning'

56

Hazardouswithwarning

Very high severity raningwhen a !otentia" #ai"ure $odea##e%ts sa#e vehi%"e o!eration

and&or invo"vesnon%o$!"ian%e with

govern$ent regu"ation withwarning

<r $ay endanger o!erator +$a%hine or asse$("y,with warning'

8



MQS/F 6



This ranking results when a potential failure moe results in a final customer an!or amanufacturing!assembly plant efect" The final customer shoul always be consiere first" #f bothoccur$ use the higher of the twoseverities"(Customer Effect ,


This ranking results when a potential failuremoe results in a final customer an!or amanufacturing!assembly plant efect" The final customer shoul always be consiere first" #f both occur$ use the higher of the two severities"(Manufacturing/Assembly Effect)

Raning

Very High Vehi%"e&ite$ ino!era("e +"oss o# !ri$ary #un%tion,'

<r 566C o# !rodu%t $ay have to (es%ra!!ed) or vehi%"e&ite$ re!aired inre!air de!art$ent with a re!air ti$egreater than one hour'

:

High Vehi%"e&ite$ o!era("e (ut at aredu%ed "eve" o# !er#or$an%e'*usto$er very dissatis#ied'

<r !rodu%t $ay have to (e sorted and a!ortion +"ess than 566C, s%ra!!ed) or vehi%"e&ite$ re!aired in re!air

de!art$ent with a re!air ti$e (etween aha"# hour and an hour'

;

Moderate Vehi%"e&ite$ o!era("e (ut*o$#ort&*onvenien%e ite$+s,

ino!era("e' *usto$er dissatis#ied'

<r a !ortion +"ess than 566C, o# the!rodu%t $ay have to (e s%ra!!ed with no

sorting) or vehi%"e&ite$ re!aired in re!air de!art$ent with a re!air ti$e "ess than aha"# hour'

=


http://slidepdf.com/reader/full/fmea-tables 7/10 MQS/F 7



This ranking results when a potential failure moe results in afinal customer an!or amanufacturing!assembly plant efect" The final customer shoul always be consiere first" #f bothoccur$ use the higher of the twoseverities"(Customer Effect)



Raning

Low Vehi%"e&ite$ o!era("e (ut*o$#ort&*onvenien%e ite$+s,o!era("e at a redu%ed "eve" o# !er#or$an%e

<r 566C o# the !rodu%t $ay have to (erewored) or vehi%"e&ite$ re!aired o##"ine(ut does not go to re!air de!art$ent'

7

Very "ow Fit and #inish&S/uea andRatt"e ite$ does not %on#or$'0e#e%t noti%ed (y $ost

%usto$ers +greater than;7C,'

<r the !rodu%t $ay have to sorted) withno s%ra!) and a !ortion +"ess than566C,rewored'

>

Minor Fit and #inish&S/uea andRatt"e ite$ does not %on#or$'0e#e%t noti%ed (y 76C o# %usto$ers'

<r a !ortion +"ess than 566C, o# the!rodu%t $ay have to (e rewored) withno s%ra!) on"ine (ut out o# station'

?





This ranking results when a potential failure moe results in afinal customer an!or amanufacturing!assembly plant efect" The final customer shoul always be consiere first" #f bothoccur$ use the higher of the twoseverities"

(Customer Effect)



Raning

Very

Minor

Fit and #inish&S/uea and

Ratt"e ite$ does not %on#or$'

noti%ed (y dis%ri$inating

%usto$ers+"ess than 97C,

<r a !ortion +"ess than 566C, o# the

!rodu%t $ay have to (e rewored) with

no s%ra!) on"ine (ut in station'

9

None No dis%erni("e e##e%t <r s"ight in%onvenien%e to o!eration or

o!erator) or no e##e%t'

5



2FMEA 12FMEA 1 Occurrence Rating TableOccurrence Rating Table

#ro$a$i%ity 'ike%y Fai%&re Rates #.k Ranking

Very High1 2ersistent Fai"ures 3&4 566 !er thousand !ie%es @6'77 56

76 !er thousand !ie%es 3&46'77 8

High1 Fre/uent Fai"ures 96 !er thousand !ie%es 3&46';: :

56 !er thousand !ie%es 3&46':= ;

Moderate1 <%%asiona" Fai"ures 7 !er thousand !ie%es 3&46'8> =

9 !er thousand !ie%es 3&45'66 7

5 !er thousand !ie%es 3&45'56 >

Low1 Re"ative"y Few Fai"ures 6'7 !er thousand !ie%es 3&45'96 ?

6'5 !er thousand !ie%es 3&45'?6 9

Re$ote1 Fai"ure is un"ie"y @&4 6'65 !er thousand !ie%es 3&45'=; 5



%FMEA Detection Rating Table%FMEA Detection Rating Table

0ete%tion *riteria Ins!e%tion Ty!es Suggested Range o# 0ete%tion Methods Raning

A B *

A"$ost I$!ossi("e A(so"ute %ertainty o# nonDdete%tion

*an not dete%t or is not %he%ed 56

Very Re$ote *ontro"s wi"" !ro(a("y not dete%t' *ontro" is a%hieved with indire%t or rando$ %he%s on"y 8

Re$ote *ontro" have !oor %han%e o# dete%tion'

*ontro" is a%hieved with visua" ins!e%tion on"y :

Very Low *ontro"s have !oor %han%e o# dete%tion

*ontro" is a%hieved with dou("e visua" ins!e%tion on"y ;

Low *ontro"s $ay dete%t *ontro" is a%hieved with %harting $ethods)su%h as S2*+Statisti%a" 2ro%ess *ontro",

=

Moderate *ontro"s $ay dete%t *ontro" is (ased on varia("e gauging a#ter !arts have "e#tthe station)or Go&No Go gauging !er#or$ed on 566C o# the !arts a#ter !arts have "e#t the station

7

Moderate"y High *ontro"s have a good %han%e todete%t'

Error dete%tion in su(se/uent o!erations)<R gauging!er#or$ed on set u! and #irst !ie%e %he% +#or setDu!%auses on"y,'

>

High *ontro"s have a good %han%e todete%t'

Error dete%tion in station)<R error dete%tion insu(se/uent o!erations (y $u"ti!"e "ayers o#

a%%e!ten%e1su!!"y)se"e%t)insta"")veri#y'*annot a%%e!tdis%re!ant a!rt'

?

Very High *ontro"s a"$ost %ertain to dete%t Error dete%tion in station+auto$ati% gauging withauto$ati% sto! #eature,'*annot !ass dis%re!ant !art'

9

Very High *ontro"s %ertain to dete%t 0is%re!ant !arts %annot (e $ade (e%ause ite$ has (eenerrorD!roo#ed (y !ro%ess&!rodu%t design'

5

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