Hello/ I am planning a gage R&r Studies for all instruments acc to IATF, IATF 16949 ,what can do recommend to meet compliance ?
Since we have manw instruments;Can I make MSA planning according to a certain criteria ? if so, couldyou please let me know some possible options
Thanks and best regards
Acceptance criteria for MSA should be in line with customer-specific requirements (CSR’s). If there is no CSR in this regard, AIAG MSA Manual rev 4 which is a blue book can be used as a reference. About measurement systems analysis; The IATF 16949: 2016 standard requires the following requirements.
220.127.116.11.1 Measurement systems analysis
Statistical studies shall be conducted to analyze the variation present in the results of each type of inspection, measurement, and test equipment system identified in the control plan. The analytical methods and acceptance criteria used shall conform to those in reference manuals on measurement systems analysis. Other analytical methods and acceptance criteria may be used if approved by the customer.
Records of customer acceptance of alternative methods shall be retained along with results from alternative measurement systems analysis (see Section 18.104.22.168).
Note: Prioritization of MSA studies should focus on critical or special product or process characteristics
So as you know, an MSA study must be carried out for each type of instrument specified in the control plan. In other words, MSA is not required if measurement equipment is not defined in the control plan. If any automotive customer, in customer-specific requirements, is stated that there is an obligation to do MSA studies once a year; then MSA studies must be done once a year. But if there is no such request; as long as the measurement device does not change, malfunction or the device is changed; MSA is not required every year.
Briefly, MSA should be for every type of measuring instrument included in the control plan. Better have an MSA plan prepared.It is recommended to start with the critical product and process characteristics.There are also many methods for MSA. There is no only Gauge RR study, there are bias, linearity, stability, short method, ANOVA, GRR, attribute methods, destructive methods, etc. The correct MSA method should be chosen according to the type of measurement system.
For more information, please see the following article:
There are many different MSA methods. I recommend that you review the blue-covered MSA rev 4 manual published by AIAG or the VDA Volume 5 manual published by VDA.
For measuring instruments that give a numerical value and can also be influenced by the measuring operator, for example, caliper, micrometer, high caliper, comparators, etc. The GRR method, which is usually 2 or 3 apprisers-10 pieces-2 or 3 repetitions, is used.
For measuring instruments that cannot give numerical values such as visual, gauge control. Attribute study is used with 50 pieces over 2 or 3 operators with 2 or 3 repetitions
Nonreplicable, ie for non-repeatable measuring instruments; eg measuring instruments such as hardness test, tensile test, etc. In this case, the "split specimen" method can be used or studies such as bias, stability, linearity, etc. can be done by using a masterpiece.
Hello Dear Mr Firat. Thank you for your very good explanations. Concerning your sentence : "as long as the measurement device does not change, malfunction or the device is changed; MSA is not required every year.", It's something which looks obvious as soon as the equipment is calibrated for example, but I couldn't find it in te MSA 4th edition manual, except mistake from my side. Is it possible to have the chapter or place we can find that inside the manual. This to repply to an Audit question still opened. Thanks in advance. Best Regards.
The issue that MSA should be done every year is not clearly written in the AIAG MSA rev 4 book. If the customer does not have a special requirement in this regard, I request you consider article 22.214.171.124.1 of the IATF 16949 standard. Here it says to prioritize critical parts and measures. In this center, you can make an annual MSA plan and plan it according to importance and criticality.