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  FMEA and Control Plans
  PFMEA differences between QS and VDA

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Author Topic:   PFMEA differences between QS and VDA
Howard Atkins
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Posts: 202
From:Israel
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posted 05 May 2001 03:43 AM     Click Here to See the Profile for Howard Atkins   Click Here to Email Howard Atkins     Edit/Delete Message   Reply w/Quote
In VDA 4.2 the criteria for PFMEA are for severity:

10 Safety risk, non-compliance with statutary
9 provisions, Conked-out vehicle.



Large
8 Operability of vehicle considerably
7 impaired. Immediate inspection at
garage is urgently required. Restricted
functioning of important subsystems.

Moderate
6 Operability of vehicle impaired.
5 Immediate inspection at garage
4 is not urgently required. Restricted
functioning of important comfort and
convenience systems.

Low
3 Minor restriction of operability of the
2 vehivle, Clearing at next scheduled
inspection in garage, Minor restrictions
of comfort and conveniences systems.

Very low
1 Very minor restriction of operability,
discernible only by the skilled personnel

Whereas in The AIAG book they are :


May endanger machine or assembly operator. Very high severity ranking when a
potential failure mode affects safe vehicle operation and/or involves noncompli
ance with government regulation. Failure will occur without warning.

May endanger machine or assembly operator. Very high severity ranking when a
potential failure mode affects safe vehicle operation and/or involves noncompli
ance with government regulation. Failure will occur with warning.

Major disruption to production line. 100% of product may have to be scrapped
Vehicle/item inoperable, loss of primary function. Customer very dissatisfied.

Minor disruption to production line. Product may have to be sorted and a portion
(less than f 00% ) scrapped. Vehicle operable, but at a reduced level of perfor
mance. Customer dissatisfied.

Minor disruption to production line. A portion (less than 100%) of the product may
have to be scrapped (no sorting). Vehicle/item operable, but some Comfort?
Convenience item(s) inoperable. Customers expenences discomfort.

Minor disruption to production line. 100% of product may have to be reworked.
Vehicle/item operable, but some Comfort/Convenience Item(s) operable at
reduced level of performance. Customer experiences some dissatisfaction.

Minor disruption to p reduction line. The product may have to be sorted and a
portion (less than 100%) reworked. Fit & Finish/Squeak & Rattle item does not
conform. Defect noticed by most customers.

Minor disruption to production line. A portion (less than 100%) of the product may
have to be reworked on-line but out-of-station. Fit & Finish/Squeak & Rattle item
does not conform. Defect noticed by average customers.

Minor disruption to production line. A portion (less than 100%) of the product
have to be reworked on-line but in-station. Fit & Finish/Squeak & Rattle Item may
does not conform. Detect noticed by discriminating customers.

No effect.
As can be seen in QS there is a relationship to the production line as well as the vehicle.
Does this mean that in VDA one only has to refer to the finished product and if you are a tier not refer to what effect there is on your customer.
Can any one offer explanations.
Thanks


------------------
Howard Atkins, IQS
howard@iqualitys.com

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Marc Smith
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Posts: 4119
From:West Chester, OH, USA
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posted 05 May 2001 05:32 AM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
I don't have a copy of VDA 4.2, but are you sure those are for the PFMEA (see /FMEA/sld128.htm ) and not the DFMEA (see /FMEA/sld073.htm )?

Note the PFMEA has some commonality to the MFMEA (see /FMEA/sld093.htm ).

Typically the DFMEA addresses vehicle (system) failures while the PFMEA addresses process failures.

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Howard Atkins
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Posts: 202
From:Israel
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posted 06 May 2001 12:47 AM     Click Here to See the Profile for Howard Atkins   Click Here to Email Howard Atkins     Edit/Delete Message   Reply w/Quote
Marc ,
I am sure that these are PFMEA see http://www.iqualitys.com/pfmeavda.pdf
Thanks

------------------
Howard Atkins, IQS
howard@iqualitys.com

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Marc Smith
Cheech Wizard

Posts: 4119
From:West Chester, OH, USA
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posted 06 May 2001 06:47 AM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
I'm out for this round then - I haven't seen a PFMEA ranking like that before.

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