SAP QM - Defining Tolerance values for Quantitative Characteristics in percentage

[kaiwalya_kul]

I have defined a couple of Quantitative characteristics with units of measurement 'cm' and 'm2'. I want to define Tolerance values for these Characteristics as x% of Target Value. In MIC>>Quantitative Data, it is only possible to define fixed values for Tolerance. I also tried defining a Tolerance key with unit of measure '%' and then defining upper and lower tolerance limits in Tolerance Key. But his won't work as MIC and Tolerance Key has different unit of measurement.

Any inputs on how tolerance values can be calculated as % of Target Value?

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[AlbertSAP]

Dear Kaiwalya Kulkarni,

thank you for the details provided.

My ideas to the topic:

1.) The F1 Help of field lower/upper specification limit describes a "relative" option:

"Lower Specification Limit

Lower limiting value for the actual value of an inspection characteristic.

Use

The actual value for an inspection characteristic can be one of the following values, depending on the recording form:

• Mean value of summarized measured values
• Single measured value
• Class size for a value class

Individual measured values that lie below this specification limit, or value classes whose class limits are below this specification limit, are valuated as "not OK" or "R" (rejected).

Mean values that lie below this specification limit are also valuated as "not OK," provided that the valuation of the inspection characteristic or sample is planned on the basis of specification limits.

Procedure

You can enter either an absolute value or a relative value based on a target value. To enter a relative value, proceed as follows:

1. Enter a target value.
2. In the field for the specification limit, enter an * followed by a relative value. Once you have chosen CONTINUE, the system calculates and displays the specification limit as an absolute value.

Dependencies

You define the precision of this field (number of decimal places) in the corresponding field."

2.) This function is also available in the tolerance key:

3.) Actual % calculation I know for the plausibility limit:

2792628 - LoPlausibility limit & UpPlausibility limit in table QAMV

Have a nice day,
Albert
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[kaiwalya_kul]

Hi Albert, thanks for your response.

Like you wrote, I checked the information with F1-Help function for Lower/Upper Specification Limit and tried entering Relative Tolerance values for specification limits.

For e.g. My Target Value is 1500. As instructed in 2nd step of Procedure of Help, I Entered *15 as my relative tolerance value. But still, these values hold same unit of measurement as the Characteristics. That means if Unit of Measurement for my Quantitative Characteristic is cm, the relative tolerance calculated will be 1500 cm (Target Value) ± 15 cm (Tolerance). The result is same if I define these Tolerance values in Tolerance Key.

My requirement is, I need to define Tolerance as % of Target Value. I thought it would be possible if I create a custom Tolerance Key with '%' as Unit of Measurement and define Upper/Lower limits in Tolerance key. Thereby, when I assign this Tolerance Key to my MIC, the system will calculate the values for Upper and Lower Tolerance Limits for that MIC using Tolerance values AND the Unit of Measurement defined in Tolerance Key. Unfortunately, the system doesnot allow assignment of Tolerance Key to Characterisctic with different Units of Measurement.

Still trying to figure out a way. Let me know if you think of any other solution.

Thanks a lot once again.

[AlbertSAP]

Dear Kaiwalya Kulkarni,

thank you for the feedback, peers might have additional ideas in the topic.

Have a nice day,

Albert

[kaiwalya_kul]

Hi albert.molnar ,

Just wanted to update you that the problem is resolved. I did not receive much feedback on my question so I explored the System myself for solution. Fortunately, I found one.

I have written a blog post which explains the solution. Here is the link. Feedback/Suggestions are welcome.

SAP QM – Maintaining Tolerance values for MIC’s in percentage using Specification determination rule...

Thanks again for your response.

Regards,

Kaiwalya