SBS - The best value in QMS software

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!
 
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
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
J Promoting and marketing of a non approved device 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 4
G 0 non conformities in registrar audits over 4 years Management Review Meetings and related Processes 12
K CE Marking Class 1 (Non sterile) medical device CE Marking (Conformité Européene) / CB Scheme 3
M Supplier requirements - Major supplier is a Non-Profit registered with ICCBBA (FDA UDI) Supply Chain Security Management Systems 12
S Non parametric test for semi-quantitative data. Statistical Analysis Tools, Techniques and SPC 5
B Free Sales Certificate for Non Medical Devices Other Medical Device Related Standards 2
P Ppk results shown as asterisk after the transformation of Non-normal data Using Minitab Software 4
I When is necessary to have RoHS declaration on non-electrical parts? REACH and RoHS Conversations 1
Johnnymo62 Non Aerospace topics - Anything for military trucks, trailers, Humvee type vehicles? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 8
G Dealing with non conformity caused by Supplier Components detected in the production line IATF 16949 - Automotive Quality Systems Standard 14
M Who are the go to companies for non-destructive hardness testing? General Measurement Device and Calibration Topics 3
R Non conformance (NC) or Corrective & Preventive action (CAPA) CE Marking (Conformité Européene) / CB Scheme 7
M How does IEC-60601-1 apply to a non-medical device in the patient vicinity? IEC 60601 - Medical Electrical Equipment Safety Standards Series 1
A FDA guidance on non-sterile Medical Device Packaging Medical Device and FDA Regulations and Standards News 7
E Qualification for non gmp service providers Supplier Quality Assurance and other Supplier Issues 1
R MDD x PPE Directive - Statement of Non-Applicability EU Medical Device Regulations 3
B Exclusions or justification for non-applicability of IEC standards Reliability Analysis - Predictions, Testing and Standards 1
C Non-EU Language Requirements Other Medical Device Regulations World-Wide 3
A Non-Conformances Found After 3rd Party Sorting Supplier Quality Assurance and other Supplier Issues 12
T ISO 13485 8.3 - Non-Conforming Materials - on-line rework or part of process? ISO 13485:2016 - Medical Device Quality Management Systems 11
N Audit non-compliance API Q1 - Use of External Documents 4.4.4 in Product Realization Oil and Gas Industry Standards and Regulations 8
D Using non-conforming components even though the final assembly is conforming? Manufacturing and Related Processes 5
N Competent Authority notification for non-EU manufacturer EU Medical Device Regulations 4
M CE marking for NON-EU EU Medical Device Regulations 0
E Non-GMP examples in Pharmaceutical industry Pharmaceuticals (21 CFR Part 210, 21 CFR Part 211 and related Regulations) 2
blile Increasing PFMEA occurrence ranking after non-conformance FMEA and Control Plans 4
S Non-Conformance and Deviations ISO 13485:2016 - Medical Device Quality Management Systems 4
B Risk Assessment Checklist for Non product Software IEC 62304 - Medical Device Software Life Cycle Processes 1
T Ideas for developing a Supplier Quality Management System, non automotive ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 5
N Audit non-compliance - API Spec Q1 9th Ed 5.6.1.2 b Oil and Gas Industry Standards and Regulations 10
R Applicability of new non-harmonized standards (MDD/MDR) EU Medical Device Regulations 14
M Scope of Combined ISO 9001 and IATF 16949 QMS - Non-automotive customers ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 5
J Guidance on manufacturing non-surgical face masks US Food and Drug Administration (FDA) 3
D Do non-IATF customers need to be included in audit scope? IATF 16949 - Automotive Quality Systems Standard 23
C If it doesn't prevent a non-conformance, is it a preventive action? IATF 16949 - Automotive Quality Systems Standard 13
G Addressing Non-Conformances from an Internal Audit that are not product related ISO 13485:2016 - Medical Device Quality Management Systems 11
T Non conformance product identification and traceability 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 4

Similar threads

Top Bottom