Status 

Using status management, you can find out about the processing status of a business transaction, and change individual statuses. Each status informs you at header and item level that a specific status has occurred (for example, quotation has been released), and specifies which step may be executed next (for example, release is allowed).

System Status is defined by the system, and can only be changed by you if this is also defined by the system.

User Status can be defined by you, and can be changed during transaction processing. You can define these in the StatusProfile as an enhancement for the system status.