Sample Determination (QM-PT-BD-CAT)
Purpose
The automatic determination of samples is a part of the inspection process. The sampling procedures, sampling schemes, and dynamic modification rules serve as the basic data for the sample determination process.
To adapt the inspection to the expected quality level, the system can modify the inspection scope dynamically. With the help of the sampling procedures and dynamic modification rules stored in the inspection characteristics, the system modifies the inspection scope according to the current quality level.
Implementation Considerations
You use the
Sample Determination
component if you want:
To evaluate inspection lots on the basis of samples
The system to dynamically modify the inspection scope on the basis of the quality level
To implement statistical process control (SPC) with the help of control charts or process capability indexes
Integration
On the basis of your predefined specifications, the SAP system retrieves the information for the sample determination from the following sources:
Basic Data |
Additional Information |
The sampling scheme contains information for drawing samples, based on the size of the inspection lot and various inspection severities/AQLs. You can assign a sampling scheme to a sampling procedure. |
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In addition to the information about the sampling type, the sampling procedure also contains information about the valuation mode for a characteristic during an inspection. If you assigned a sampling scheme to a sampling procedure, the system calculates the sample sizes to be used to inspect the material on the basis of the lot size and the inspection severity (or inspection severity and AQL value). |
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If you store a dynamic modification rule in the inspection plan, the system varies the sample size based on the past results. The dynamic modification rule and the sampling procedure must have an allowed relationship. |
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To calculate the sample size, you can assign a sampling procedure to the characteristics in an inspection plan or material specification. During inspection processing, the system calculates the sample sizes on the basis of the specifications in the inspection characteristics. |
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To allow the system to calculate samples without a task list or material specification, in the inspection setup in the material master Quality Management view, enter a sampling procedure for the inspection type. Using a dynamic modification rule, the system can determine the sample size on the basis of the quality level. In this case, the system retrieves the dynamic modification criteria from the inspection lot origin. |
See also:
Sampling Scheme Without Valuation Parameters