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In public sector organizations, no business activity, which leads to a future payment can be posted/approved without an available budget. Early (as soon as possible) earmarking of the budget consumption is paramount to plan accordingly. This means that when governments foresee future payments as a result of an operative commitment document, they must reserve their budget. This reservation of the budget needs to be documented through a financial budget consumption document, which is controlled by active availability checking.
This mechanism is referred to in this document as commitment updating.
In certain cases, a commitment document is not available, so the actual document is directly consuming the budget. In both cases (with and without a reference to a predecessor commitment document) this is referred to as actual updating. Commitment and actual postings together form the budget consumption.
PSM-specific commitment and actual information are recorded in the universal journal (table ACDOCA) by adding the respective PSM account assignments or master data and budgetary attributes to the universal journal entries during document posting.
In the case of commitment postings (such as purchase requisitions, purchase orders, earmarked funds), the ledger 0E is updated, whilst the ledger 0L is used for actual documents. Further ledgers are possible and described in a later chapter.
The main place where budgetary attributes are stored is in the general ledger account. In particular, expense and revenue accounts (with a few exceptions like assets and down payment accounts) contain the main attributes, which control budget consumption. During posting of a commitment or actual, the general ledger account is used to derive the budgetary attributes and store them in the respective ledger of universal journal.
To understand the key concepts of budgetary attributes, see the following chapter and also refer to the earlier master data chapter, which also describes the budget account concept.