Abstract: A system for collaboratively managing complex, longtail property and casualty insurance claims which is remotely and continuously accessible by all users designated by the insurer. The users can access documents retained in a centralized database through an application layer. The application layer includes a workflow application, a document management application and an administrative application. A method for collaboratively managing complex claims includes the storage of documents in a centralized remotely-accessible computer database, access to the documents through an application layer, and management of the claim management process through a workflow management application used in connection with a document management application.