The posting scheme table is maintained with the transaction ZWFAT151 

This table is common to all controlling areas. It determines the accounts on which the « Reverse » and the « Valuation » will be posted depending on the original revaluation document (document type PR issued from costing run). It needs to be updated only if there is an accounting change.

Source keys (in grey in print below):

• ValCl: Valuation Class for the materials
• G/L account: G/L account determined by valuation class
• PK: Posting Key issued from reference document – to be reversed

Target key (in white in print below): 

• G/L account: Target G/L account
• PK: Target posting key used in the « Valuation »
• PK Reverse: Target posting key used in the « Reverse »