﻿ Define valuation mode (Quality Planning)

Define valuation mode

In this step, you can:

• Define how a decision is made to accept or reject inspection characteristics (valuation mode). These decisions are used in the sampling procedure.
• Integrate your own function modules that allow you to make the decision whether to accept or reject inspection characteristics.

You must decide which one of the basic forms you want to use. These forms are as follows:

• Manual decision
This is required for attributive characteristics (that is, characteristics for which no values are recorded). These are characteristics you simply accept or reject. This type of decision is also used in all other cases, where an automatic valuation is not possible or allowed.
• Code valuation: a decision on the basis of qualitative attributes.
The decisions are stored in the catalog for characteristic attributes.
• A decision based on a sampling plan for discrete characteristics (attributive inspection) with the following options:
• Number of defects
• Number of nonconforming units
This also includes a decision based on the tolerance specifications for the measured values of quantitative characteristics.
• A decision based on a sampling plan for quantitative characteristics (variable inspection) with the following options:
• Complying with the distribution limits of the characteristic values (s-method)
• Complying with the mean value limits of characteristic values (checking the tolerance specifications)
This is a special application of the s-method, where k = 0.
• A decision based on a control chart.

You can assign suitable, different valuation rules to these basic forms and thereby define different valuation modes, such as:

Simple valuation

• Manual valuation
• Code valuation. This valuation is based on the attributes of qualitative characteristics
• Valuation based on the number of defects
• Valuation based on the number of nonconforming units
The valuation of quantitative characteristics according to whether they lie within the tolerances of the measured results is also included under this heading.
• Valuation based on tolerance specifications for the mean value. This valuation uses the attributes of variable (quantitative) characteristics by comparing the mean value with the limits of the tolerance range.

Valuation modes for procedures using sampling schemes:

• Valuation according to sampling plan for:
• Attribute inspection, for discrete characteristics (in accordance with ISO 2859)
• Variable inspection, for continuous characteristics (in accordance with ISO 3951)
The system supports a single-sided and double-sided s-method.

Valuation based on the limits of a control chart

Valuation modes for procedures using independent multiple samples:

• Valuation according to the:
• Worst case principle
• Last case principle
• Best case principle

The valuation modes for procedures with independent multiple samples are suitable for the valuation of characteristics in:

Inspections during production

• Valuation based on inspection point results
• Valuation of results for partial lots
• Inspection of physical samples
• Inspection of maintenance objects

Standard settings

In the standard system, the table of valuation rules is designed so that all commonly used valuation modes are supported at characteristic level.

The tables have the delivery class G. The following name range is reserved for the user:

• Valuation mode 9*, A*, ... Z*
• Valuation mode 9*, A*, ... Z*

SAP Recommendation

Use the valuation modes contained in the standard system.
Do not delete any of the valuation modes contained in the standard system; instead, you can lock the entries you do not need.

Do not delete any of the valuation rules contained in the standard system and under no circumstances delete valuation rules A1, A2, A3, A4, A5, since these were used for programming.

You only need to maintain your own valuation rules in special cases.

Activities

1. Determine whether additional or other valuation modes are used in your company. If necessary, you must also define and program appropriate valuation rules for these valuation modes.
2. Determine whether you need additional or other valuation rules. Define these rules only if required.
a) Program corresponding function modules.
b) Assign the valuation rules to the relevant valuation modes.

The valuation mode is stored in the sampling procedure.
If you work with independent, multiple samples, enter an additional valuation rule in the sampling procedure to link the characteristic decisions for individual samples to an overall decision.

The valuation of an inspection characteristic is usually made up of several steps that take place at the following levels:

• Valuation of original values or value classes
In summarized results recording original values or value classes are not valuated.
• Valuation of samples
If the system does not allow for multiple samples, there is no valuation at sample level
• Valuation of a characteristic

The valuation rules mentioned above are active at characteristic or sample level. At original value, or value class level, the valuation rules that are dependent on the control key for the characteristic are fixed automatically by the system:

• Manual valuation
• Code valuation for qualitative characteristics with characteristic attributes
• Valuation based on tolerance specifications for quantitative characteristics

The valuation rule is stored in the valuation mode and can be included in this way in the sampling procedure.
There are two valuation rules for independent multiple samples; one for characteristic-based decisions for individual samples and one for characteristic-based decisions for all samples.

Inspections during production can cover several inspection points and partial lots; valuation rules are also required for these.

You may also require additional valuation rules, for example for characteristic valuation in an inspection of physical samples or maintenance objects.