Clearly the ideal solution is a single, company-wide archiving system. The advantage is that documents are in uniform data formats and indexed according to identical criteria. Thorough indexing in turn allows access rights to be granted and documents to be distributed automatically. At the same time it prevents duplicate filing of documents.
Where structures are more complex, different divisions often use different archiving systems or apply separate solutions for different types of document. This makes the archiving infrastructure more complex and leaves it prone to error.
Usually it is also more expensive. In this case it is worth reviewing whether a digital subarchive can be moved into a single system.