In its simplest form workflow can be driven by check boxes on forms within a document management system.  For instance, when post is scanned it can be marked as unread on the metadata and found with a simple search.  After processing removing the mark removes the files from the workflow.

More advanced workflow can be provided by defining routes for a document, with specific tasks to be completed by various individuals or roles.  A record is maintained of who has done what and managers can monitor the process.

Fully featured workflow is focused on the process rather than a document.  Integration with third party and possibly external applications automates the process and decision making can change the progress on the workflow.

Alternative Solutions has experience in all levels of implementing workflow.

Information Security Management System