Sampling Procedure 
Sampling Procedure
Definition
A sampling procedure defines the rules that specify how the system calculates the sample size and it contains information about the valuation of an inspection characteristic during results recording (attributive, variable, manual, etc.).
Use
Sampling procedures are usually used at characteristic level of a task list or material specification. You can however determine the sample size, without reference to task lists. To do this, you define a sampling procedure for the inspection type in the inspection setup (Quality Management view of the material master), or in
Customizing.
Structure
The rules for determining the sample are stored in the sampling type. The sampling type and valuation mode are combined for the inspection characteristics. This combination forms the structure of the sampling procedure.
Sampling Type
The sampling type defines how a sample is calculated (for example, fixed sample, 100% inspection, use sampling scheme, percentage sample). Together with the valuation mode, the sampling type defines the parameters for sample determination.
Using the sampling type, the system proposes a list of rules for sample determination. If there is only one rule available, this is automatically chosen.
Valuation Mode
The
valuation mode (for example, attributive inspection on the basis of nonconforming units, variable inspection according to s-method [one limit], without valuation parameters) defines the rules for accepting or rejecting a characteristic or sample. The sampling type and the valuation mode specify which parameters the system uses to determine a sample size.Inspection Points
If you want to use
inspection points in the sampling procedure, you need to set an indicator for the corresponding application area. This indicator specifies how many inspection points are to be created for each inspection lot.Usage Indicator
To prevent the sampling procedure from being referenced in a task list, you set the indicator No use in insp.plan.
The system automatically sets the indicator Use in insp. plan, if the sampling procedure is referenced in a task list.
Control Chart Type
If you want to use quality control charts in a sampling procedure, you must enter a quality control chart type. The control chart type specifies:
Special Indicator
If you do not want individual characteristics in an inspection plan to be
dynamically modified, you can assign a sampling procedure, in which the indicator No stage change is set. In this case, the system determines the inspection severity for calculating the sample size for these characteristics from the sampling procedure.
Multiple Samples
You can create sampling procedures to plan:
Integration
Sample Determination with Inspection Plan/Material Specification
If you use an inspection plan/material specification for sample determination, you assign a sampling procedure to the inspection characteristic or you define a sampling procedure in
Customizing.If you also want a characteristic to be dynamically modified and if you want to use a sampling scheme for the sample determination, you must maintain the
allowed relationships for the sampling procedure and dynamic modification rule directly after you save this sampling procedure.You can only use certain sampling procedures in inspection plans, depending on whether you use inspection points. For example, if you want to use sampling procedures in sample management, you must specify the appropriate inspection point identifier in the sampling procedure.
Sample Determination Without Inspection Plan/Material Specification
If you do not use an inspection plan/material specification, you have the following options for maintaining the inspection type in the material master: In the
inspection setup in the Quality Management view of the material master, you can:You can specify all sampling procedures. However, you can only use valuation modes that do not have valuation parameters. In addition, you can only use valuation modes without valuation parameters for determining samples with the help of a sampling scheme.
If you also want a characteristic to be dynamically modified and if you want to use a sampling scheme for the sample determination, you must maintain the allowed relationships for the sampling procedure and dynamic modification rule directly after you save this sampling procedure.
See also:
Sampling Procedure with Fixed Sample Sampling Procedure with Percentage Sample Sampling Procedure with Sampling Scheme
Maintaining Sampling Procedure for Control Charts