FMEA and some questions from a teacher

R
#1
Hello all,

I’m a teacher at the HORITO in Belgium and I will be trying to explain to my students what FMEA is and where it is and can be used. At the moment I have still some questions about this myself. Is there someone who can help me with the following:
- Does anyone has a clear example of an CONCEPT FMEA? I think I understand the theory about it but that won’t be enough to explain to my students.
- A question about the occurance rating at a DESIGN FMEA: failure mode: component breaks, potential causes: 1) wrong usage by customer, he didn’t know how to use it 2) material thickness was wrong calculated by the design engineer.
Does the OCC-rating at 2) say how often a design engineer calculates something wrong or how often the component breaks due to wrong calculation?
- Is the detection of the effect rated the same as the detection of the cause when they are of the same ‘quality’. Their chance to detect is the same.


Very many thanks
Raf Aernouts
 
Elsmar Forum Sponsor
M

MSAFAI

#4
DEAR RAF PLEASE FIND MY REMARKS BELOW IN CAPITAL:


Originally posted by Raf:
Hello all,

I’m a teacher at the HORITO in Belgium and I will be trying to explain to my students what FMEA is and where it is and can be used. At the moment I have still some questions about this myself. Is there someone who can help me with the following:
- Does anyone has a clear example of an CONCEPT FMEA? I think I understand the theory about it but that won’t be enough to explain to my students.
- A question about the occurance rating at a DESIGN FMEA: failure mode: component breaks, potential causes: 1) wrong usage by customer, he didn’t know how to use it 2) material thickness was wrong calculated by the design engineer.
Does the OCC-rating at 2) say how often a design engineer calculates something wrong or how often the component breaks due to wrong calculation?
- Is the detection of the effect rated the same as the detection of the cause when they are of the same ‘quality’. Their chance to detect is the same.

ACCORDING TO AIAG, THE DETECTION RANKING RELTAES TO THE CONTROLS IN PLACE TO 'DETECT' THE FAILURE MODE OR THE CAUSE. THEREFORE CONTROLS ARE NOT RELATED TO THE EFFECT. DETECTION RANKING SHOWS THE ABILITY OF THE CONTROL TO "DETECT" A FAILURE MODE OR A CAUSE. THEREFORE, TO MY VIEW, THE SAME RANKING SYSTEM CAN BE USED FOR BOTH FAILURE MODE AND CAUSE.

I HOPE THIS HELPS TO CLARIFY A BIT.

REGARDS,
MSAFAI


Very many thanks
Raf Aernouts
 

Marc

Hunkered Down for the Duration
Staff member
Admin
#5
-> - Does anyone has a clear example of an CONCEPT FMEA? I
-> think I understand the theory about it but that won't be
-> enough to explain to my students.

An FMEA is just a risk analysis. Whether Process, Design, System, Hazardous Operations or whatever - in this case a Concept - you just state the concept and then start listing possible failure modes. A concept FMEA might include possible design and function failures. It might even include some possible process failures related to issues such as buying the prper equipment, I would guess. If it is early enough and broad enough it may even address possible logistics faliure modes.

-> Does the OCC-rating at 2) say how often a design engineer
-> calculates something wrong or how often the component
-> breaks due to wrong calculation?

When your potential failure mode is component breaks because the material thickness was calculated incorrectly by the design engineer, you are addressing how often a design engineer calculates something wrong - in this case the thickness. I would hope this would be a very low number...

-> - Is the detection of the effect rated the same as the
-> detection of the cause when they are of the same
-> 'quality'.

In this case, it would be the probability of detection of the designer's 'mistake' (if s/he makes one and let's hope this isn't a bridge or a building or something like that).

[This message has been edited by Marc Smith (edited 08 May 2001).]
 
P

Pauli Adriano

#6
I´m a engineering student and i´ve any doubt about FMEA.

Please sent me what diferents method are used to priorize failure modes.
Why the R
RPN number is not the besty way for priorize?
Whay this diferent methods are more best than RPN?

Thank very much Pauli Adriano
 
Thread starter Similar threads Forum Replies Date
B Frequently asked PPAP, FMEA, SPC, MSA, APQP & 7QC Tools questions for Interviews Career and Occupation Discussions 1
S Basic questions about FMEA - Opinions please FMEA and Control Plans 7
D FMEA - Questions with respect to applicability to the completed assembly FMEA and Control Plans 4
J FMEA Handbook 2019 IATF 16949 - Automotive Quality Systems Standard 3
J Process FMEA Template with examples - Cold and Hot Forged components FMEA and Control Plans 4
B Why the Greek god Hephaestus should have done a design FMEA (DFMEA) on his giant robot APQP and PPAP 1
P Design FMEA - Detection Rating criteria ISO 14971 - Medical Device Risk Management 3
J Which OEM or customers are now requiring the new AIAG/VDA FMEA format? FMEA and Control Plans 0
C AIAG/VDA FMEA - Is the new better? FMEA and Control Plans 0
I Does anybody use Detection in medical device Design FMEA? ISO 14971 - Medical Device Risk Management 18
P VDA AIAG FMEA - Slides for Quality Audience FMEA and Control Plans 4
P Design FMEA for Industrial Machinery FMEA and Control Plans 3
B AIAG/VDA’s FMEA Manual Is a Major Advance (my take on this subject) FMEA and Control Plans 2
B AIAG-VDA FMEA - When the new format will be required FMEA and Control Plans 5
D Where does "as far as possible" stop? FMEA - EN 14971 ISO 14971 - Medical Device Risk Management 29
R What are the changes in 5th Edition of FMEA manual? FMEA and Control Plans 6
M Risk and Corrective actions - Currently no FMEA's - Car systems Risk Management Principles and Generic Guidelines 8
C FMEA Process assessment In the Draft for the AIAG/VDA FMEA Manual is gone FMEA and Control Plans 0
Jimmy123 Example of a P-Diagram for Process FMEA - Uncontrollable noises FMEA and Control Plans 39
Jimmy123 FMEA - Preventive vs Detection Control FMEA and Control Plans 7
M MANUAL FMEA VDA VDA Standards - Germany's Automotive Standards 1
L Which one is more important for FMEA CC or SC, FMEA and Control Plans 6
G FMEA financial benefits APQP and PPAP 2
M Foundation FMEA: what is it? FMEA and Control Plans 15
eule del ayre Merging FMEA and Quality Control Process Flow FMEA and Control Plans 0
K AIAG/VDA FMEA & Process Control Plans FMEA and Control Plans 0
D FMEA-MSR in the AIAG-VDA Aligned Handbook - What is it? FMEA and Control Plans 4
bobdoering Catching up on the new FMEA book! Funny Stuff - Jokes and Humour 2
bobdoering AIAG VDA FMEA Handbook - 2019 - something familiar about this.... FMEA and Control Plans 37
S New AIAG FMEA Process - How to complete the new format FMEA and Control Plans 32
C FMEA - Multiple function failures considerations FMEA and Control Plans 3
J New FMEA aproach - formular Manufacturing and Related Processes 2
B Confusion on the new FMEA guidebook - Are we supposed to replace our FMEAs? IATF 16949 - Automotive Quality Systems Standard 3
Z Using FMEA for Knowledge Management FMEA and Control Plans 6
D Link between FMEA, flow chart and control plan FMEA and Control Plans 10
K PFMEA (Process FMEA) - Can be common for 3000 products? FMEA and Control Plans 2
R The difference b/w FMEA & Risk analysis as per iso 14971 ISO 14971 - Medical Device Risk Management 8
Jimmy123 ISO 31000 vs FMEA FMEA and Control Plans 1
Jimmy123 What is a Reverse FMEA? FMEA and Control Plans 6
I What does "Class" mean in an FMEA? FMEA and Control Plans 16
M FMEA/DCP Structure and Quantity - Similar Parts and Processes FMEA and Control Plans 7
Marc Definition DFMEA (Design FMEA) - Definition Definitions, Acronyms, Abbreviations and Interpretations Listed Alphabetically 0
D Where does FMEA fit in your ISO 14971 Risk Management process? ISO 14971 - Medical Device Risk Management 13
JT3M Looking for FMEA plastic injection molding FMEA and Control Plans 8
Ashok sunder Is it possible to reduce FMEA Occurrence and Detection Ranking after corrective action taken for customer complaints? FMEA and Control Plans 6
D Design FMEA for a component - Should I make the following assumptions? FMEA and Control Plans 7
N In-Process Production Test Stations in PFMEA (Process FMEA) FMEA and Control Plans 18
C VDA Vol.4 - Evaluation of an FMEA FMEA and Control Plans 0
D Do you need requirements for a Design FMEA FMEA and Control Plans 1
D System Level FMEA example wanted FMEA and Control Plans 2

Similar threads

Top Bottom