Sample, SPC

This section describes how to implement procedures, sampling schemes, dynamic modification rules, and control charts.

The sampling procedure is stored in the inspection plan for the inspection characteristic, or in the material for the inspection type. The sampling procedure determines the plan when an inspection lot is ready for processing. The system takes the current quality level together with the stored dynamic modification rule into consideration when it determines the sampling plan. The quality level determines the current inspection stage or skip stage for subsequent inspections, based on the inspection history. If the sampling procedures are supported by sampling schemes, inspection severities are assigned to the inspection stages.

In the system, the sampling procedure defines the sampling type and the valuation mode. If the sampling procedure is to be used to retrieve data for quality control charts , it will also specify the control chart type .

Standard settings

The standard system contains ready-to-use sampling schemes that conform to:

The data from the DIN standards has been reproduced with the permission of the "Deutsche Institut für Normung e.V." This data corresponds to the current version of the ISO-DIN standards.
(<Date of current release>, SAP AG)

You may copy the sampling schemes from client 000 into the current client and use them as a function of the R/3 System. SAP, however, accepts no liability for the validity of the data.

The standards may have changed since the date of the current release and errors may have occurred as a result of maintaining and importing the data. For this reason, make sure the data is valid before you use it productively!

If you have already maintained sampling schemes with the same names, you must release these names by copying the existing sampling schemes under other names.

Recommendation

Activities

1. Develop a sampling concept
Decide on a basic approach; do you want to retain the procedures used in your company or do you want re-evaluate the objectives of the sampling procedures and possibly redefine them? You can implement most of the common sampling procedures in the QM component. With the support provided by the QM component, however, you have additional options, especially for dynamic modification. If you want to re-evaluate your philosophy with respect to the sampling procedures, ask yourself the following questions:
a) What purpose should the sampling inspection serve?
b) Which sampling procedure (sampling type and valuation mode) is best for this purpose?
c) Will control charts be displayed or used for valuation purposes?
d) Are the sampling procedures currently being used supported by sampling schemes?
e) Can the inspection scope be optimized through dynamic modification?
2. Maintain the settings and master data in the proper sequence:
a) Set the sampling types .
b) Set the valuation modes .
c) Maintain the sampling schemes (create master records).
Provided you want to use sampling schemes in the sampling procedures that do not already exist in the standard system.
If you want to use
inspection severities other than the ones set in the standard system, you must first define them.
d) Define the dynamic modification rules (create master records).
e) Maintain the sampling procedures (create master records).
f) Maintain the allowed combinations of sampling procedures and dynamic modification rules.
When you maintain the sampling procedures and dynamic modification rules, the system will prompt you to maintain these combinations. You can ignore this initially. If you only need a few dynamic modification rules, but many sampling procedures, it may be convenient to maintain the dynamic modification rules first and then assign these rules immediately when you maintain the sampling procedures.

Additional Information

You can implement the most common, internationally standardized sampling systems (sampling types, valuation modes, dynamic modification rules) in the QM component without having to make any modifications. For example, this applies to:

The QM component handles the input parameters for the sampling procedures ( inspection level, inspection severity and AQL) in a special way: