Non-replicable tests in MSA (Measurement Systems Analysis)

A

Andreas M?ller

#1
#1
Hi all!

This is my first time posting something on elsmar after a long time lurking! :)

I am having some troubles with MSA and what i believe to be non-replicable tests.

We are measuring differential pressure and opacity with a running car engine,
the exhausts move through a pipe to the object being tested and the pressure is measured at two points, before and after the object, to make sure that we're not experiencing a clogged object.

The opacity test is conducted after the object to see how much of the exhausts that are moving through the object and how much of the exhausts that are stopped. This is a percentage relative to no object existing (full exhaust).

Now there are a lot of variables here for us when we try to do a normal MSA, for example the car engine (is running idle) is not running at the exact same RPM and is not returning exact same thickness and "quantity" of exhaust gas. The gas could swirl more one time from another in the pipe giving us ups and downs in the readings of both opacity and diff.pressure.

So our problem is that we do not recieve the same presets for each part each time. Would a nested r&r be helpful here? And how would i go about to conduct the study?
(I am using Minitab 16 to interpret our results)

Thanks in advance!
 
Highly Rated Gage Tracking - Learn More
Elsmar Forum Sponsor
Miner

Miner

Forum Moderator
Staff member
Admin
#3
#3
In addition to Bev's excellent article, you may want to review the overview of Non-replicable MSA studies in my blog, as well as review the section in the AIAG MSA manual.

In some cases it may be difficult or impossible to control all of the variables. In that event, you will need to use the regression approach described in my blog and in the MSA manual. This approach requires that you know or can determine the relationship between the gas and engine RPM.

I recommend performing an additional study. While I can see that such a measurement may be highly variable in the short term, I would expect it to be very consistent over the long term once you have compensated for covariates such as engine RPM. If you have the freedom to adjust test parameters, you may want to consider longer term sampling and averaging techniques.
 
A

Andreas M?ller

#4
#4
Thank you both for the article and blog entry, i have a few ideas to discuss with my collegues now and we'll see where we end up.
 
You must log in or register to reply here.
Thread starter Similar threads Forum Replies Date
J How do you perform a S3 Stability Study for a Non-Replicable Measurement System Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 1
S MSA with Non Replicable Samples Measured at Detection Limit Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 6
R Gage R&R for Torque Device (Non - Replicable Measurement Systems) Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3
R MSA gage R&R (GR&R) for Destructive Test (Non-Replicable Data) Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
T Non-Replicable MSA when using digital multimeters or oscilloscopes Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 9
Miner Intro to MSA of Continuous Data – Part 6: R&R for Non-Replicable Measurements Imported Legacy Blogs 18
K Torque Gauge R&R - Non-Replicable GRR Case Study Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 5
D RESPONSE TO NON-CONFORMITIES IATF 16949 - Automotive Quality Systems Standard 1
B Software as a NON-medical device Medical Information Technology, Medical Software and Health Informatics 1
M Is this situation Non-Conformity??? General Auditing Discussions 8
D AS9100 Rev D - Clause 8.7 Control of Non conforming outputs AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 6
M Non conformance/complaint and CAPA ISO 13485:2016 - Medical Device Quality Management Systems 6
F Product classification according to the 60601-2-57: Particular requirements [...] of non-laser light sources [...] IEC 60601 - Medical Electrical Equipment Safety Standards Series 0
Q API Spec Q1 9th Ed 4.4.2 Non-conformance Oil and Gas Industry Standards and Regulations 8
T Do I need to add non-product related service providers to my ASL? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 12
J ISO 13485- 8.3.1 Non-conforming material high volume ISO 13485:2016 - Medical Device Quality Management Systems 4
F MSA for non-contact CMM - ISO10360 Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 0
M Using a Non Certified vendor Supplier Quality Assurance and other Supplier Issues 5
somashekar Justification for Non-applicable clause at Stage 2, in clause 4. ISO 13485:2016 - Medical Device Quality Management Systems 11
Z Swiss Authorized representative & non-medical device regulations Other Medical Device Regulations World-Wide 0
R Lead auditor scenario (Need help) is this non conforming to ISO13485 Manufacturing and Related Processes 2
D Help Me. Non conformitty in External Audit IATF 16949 - Automotive Quality Systems Standard 13
S Electronic Signatures - Non-Conformance - ISO 13485:2016 ISO 13485:2016 - Medical Device Quality Management Systems 34
S Do you follow your QMS for non-device software features? Medical Information Technology, Medical Software and Health Informatics 4
J Can we register non-device clinical decision support software under draft guidance? Other US Medical Device Regulations 5
D IATF 16949 SI 10, External non-accredited lab IATF 16949 - Automotive Quality Systems Standard 4
M Selling non-CE marked devices for evaluation EU Medical Device Regulations 4
T Non API products need to comply to API Q1? Oil and Gas Industry Standards and Regulations 3
L "Shelf-Life" Class I Non-Sterile Products Expiration Date? CE Marking (Conformité Européene) / CB Scheme 3
B Process / Procedure - Radiographic (X-Ray) Non-Film Document Control Systems, Procedures, Forms and Templates 0
N How to find column number for the last non-empty column? Using Minitab Software 0
A Need to calculate tolerance Intervals with a set of non-normal data and 3-Parameter Weibull distribution Using Minitab Software 0
3 Non-conformance Register vs Corrective Action Register ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 13
G Competent Authority non-EU Manufacturer EU Medical Device Regulations 7
F Non conforming locked? Manufacturing and Related Processes 13
M Changing Investigational Device from Non-Sterile to Sterile - what are the implications? Other Medical Device and Orthopedic Related Topics 3
K Is Calibration Required for Non-Adjustable Commercial Inspection Devices? General Measurement Device and Calibration Topics 11
J Informal vs formal scope creep... managing non-medical devices through system processes ISO 13485:2016 - Medical Device Quality Management Systems 2
G Not accepting a non conformity during an audit General Auditing Discussions 11
J In-house (NHS) manufacture and use (by staff) of non-medical devices.. any regulations apply? UK Medical Device Regulations 6
B Does FDA Registration QSR need to cover non-medical devices for contract repackager? US Food and Drug Administration (FDA) 1
A Brexit Mandate for EU Authorised Representative for non medical devices CE Marking (Conformité Européene) / CB Scheme 7
E Accredited vs. non-accredited labs for 60601 compliance in the US IEC 60601 - Medical Electrical Equipment Safety Standards Series 2
E Accredited vs. non-accredited labs for 60601 compliance in the US Other Medical Device Related Standards 4
C Non-sterile reusable surgical instruments - FDA sterilization requirement Other Medical Device Related Standards 2
L Water requirement for Non-sterile topical OTCs Pharmaceuticals (21 CFR Part 210, 21 CFR Part 211 and related Regulations) 0
B Procedure packs with non-medical devices EU Medical Device Regulations 1
W Non Sterile Medical Device Environmental Tests Other Medical Device Related Standards 4
S Advice on how to reduce overhead of handling non-conforming material Nonconformance and Corrective Action 7
G Team to analyze a non conformance Customer Complaints 26

Similar threads

Top Bottom