In this step, you define which valuation classes are allowed for a material type.
If a user creates a material, he must enter the material's valuation class in the accounting data. The R/3 System uses your default settings to check whether the valuation class is allowed for the material type.
The valuation class is a group of materials with the same account determination. If a transaction is to be posted to different accounts depending on the valuation class, create an account determination for each valuation class in the step Create automatic postings.
The valuation classes allowed depend on the material type. Several valuation classes are generally allowed for one material type. A valuation class can also be allowed for several material types.
The link between the valuation classes and the material types is set up via the account category reference.
The account category reference is a combination of valuation classes. Precisely one account category reference is assigned to a material type.
In the standard SAP R/3 System, an account category reference is created for each material type. The account category reference is, in turn, assigned to precisely one valuation class. This means that each material type has its own valuation class.
We recommend that you create the account groups of your chart of accounts as an account category reference.