SIMD unitarily manages the document circuit, throughout their entire life and ensures all the standard functionalities required by a correct and efficient document management: security and confidentiality of information depending on the right of access, monitoring of the current status of the documents, automatic management of the circuit them on fixed or dynamic routes. In addition, through the intuitive interface, it allows the user to efficiently organize his work, to easily find information from documents in progress or from archived ones. Archiving of documents is done automatically, according to predetermined criteria, or manually by selecting the documents that enter the archive.