Business Transactions 
Status management is used to control business transactions in Funds Management by allocating one or more statuses to a master data object (funds center, commitment item, fund).
A business transaction is an action which you carry out by using a system transaction or function.
Business transactions in the Funds Management system include:
G/L account posting
Material purchase orders
A status can permit or forbid a commercial transaction, or have no effect on it.
Note
The business transactions in Funds Management , such as budgeting, budget supplement, and budget return, are not checked by status management, that is these transactions are always allowed.
For a business transaction to be executable, the following prerequisites must be met:
At least one status permits the transaction
No active status forbids the transaction
A status is set or active if it is in use now. It is inactive if either it was never active or it was once active, but has since been deactivated.
You can set more than one status for a master data object.
Example
You can assign the status Released to a particular combination of funds center/commitment item/fund. The status permits the "G/L account posting" transaction. At the same time, you assign the user status "Lock G/L account posting" to the same combination. The transaction is thus forbidden, as one active status forbids it, though another permits it.