Definition of a Status Network 
Use
A status network represents the entire processing cycle of a document from the beginning to the end of a phase, for example from the creation of a document to its release. The processing steps can be defined and controlled exactly.
Prerequisites
You must define statuses for each document type in Customizing for the Document Management System, by choosing Control data
® Define document types ® Define document status.Features
The statuses that you set in a relationship to one another as predecessor and successor form the status network.
You can allocate a status type to a status if you want to have greater control. The status type assigns specific features to a status, for example you may only be able to set a status when you create a document for the first time (primary status), or there may be important basic data that you are not allowed to change with a certain status (lock status).
In the following processing situations, the system sets a status automatically:
The following graphic shows a status network.
In the following status network, status

Activities
Define the important statuses for the document type that represent the processing statuses.
See: Define Status.Create one or more predecessors for each status. A maximum of six predecessors is checked. When you set a new status the system checks whether the current status belongs to the number of predecessors of the new status.