Measuring and Test Equipment that must undergo MSA

J

jay1ph

#1
7.6.1 of TS 16949 standard says that statistical studies shall be conducted to analyse the variation present in the results of each type of measuring and test equipment system, will this mean that all types of measuring and test equipment shall have MSA? How can I conduct MSA to temperature controllers which are built in on the machines?
 
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qusys

Trusted Information Resource
#2
7.6.1 of TS 16949 standard says that statistical studies shall be conducted to analyse the variation present in the results of each type of measuring and test equipment system, will this mean that all types of measuring and test equipment shall have MSA? How can I conduct MSA to temperature controllers which are built in on the machines?
Are these controls that you mention reported in the control plan? If no, you can also skip the MSA studies on those gauges ( I mean G R&R).
Hope this helps:bigwave:
 
J

jay1ph

#3
Yes, but we are having a hard time on the methodology of MSA for these types of gages. These digital instruments are bulit in on the machines and repeatable measurement is not possible.
 

qusys

Trusted Information Resource
#4
Yes, but we are having a hard time on the methodology of MSA for these types of gages. These digital instruments are bulit in on the machines and repeatable measurement is not possible.
If these controls are recalled in your control plan , you could think to assess it again. A question: did you consider them eventual potential failure from P-FMEA with high rank? If not, you can remove from your control plan and so you are not required to perform MSA.
Otherwise contact your customer to consider other analytical methods to proceed in the previous way and have them approved.:bigwave:
 
J

jay1ph

#5
If this instrument (temp controllers) is high risk in P-FMEA, do you have any idea how can MSA can be done for these instruments?
 
J

jay1ph

#6
Could you help me out on this query: How to do MSA on temperature controllers that are built in on machine? These equipments are referenced in the control plan.
 
D

Dave Mac

#7
I had a look through "Concepts for Gage R&R Studies" by Larry Barrentine. The following is suggested for electronic temperature equipment. You'll have to assess it's usefulness based on your system
1) If there is no opportunity for the operator to impact the measurements then there is no reproducibility element - so the gage r&r study becomes a gage r study (repeatability only)
2) If it is not possible to run meaningful repetitions of measurements with the equipment during operation, then the repeatability has to be assessed using the calibration system.
3) Incorporate the following into the calibration: Use a calibrated energy source to simulate the hot product. Take at least 20 measurements using the unit. If the unit is used at a number of different settings this must be repeated at each setting.
4) Plot a moving range chart to look for statistical control, and calculate standard deviation using standard control chart factors
5) Calculate the Gage R&R % as (5.15 x standard deviation) / tolerance
6) Before doing any of this, maybe you could get in touch with the temp unit manufacturer and get his advice about any procedures he would use. Also, I guess if you are using an outside firm for calibration, you could speak to them and ask for their advice.

So, basically his suggestion is to incorporate a repeatability element into your calibration procedures. So, if you think it's necessary, take a look at your current calibration procedures and try and work out how to do it.

Another thought - I'm guessing that there's some problem with measuring the impact of this heating process on the product. Otherwise, you would be determining whether the heating process was working adequately or not, based on the results of this "final product" measurement, and you would run an r&r study on that final product measurement system.
 

LUV-d-4UM

Quite Involved in Discussions
#9
Suggest that you please run procedure as per International standard after servicing the temperature controller on the machine. Just a suggestion.Thanks.
 
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