[4] It is a client–server application, with a Windows-only client and servers for Linux, Windows, and Solaris.

The Jazz platform uses Open Services for Lifecycle Collaboration (OSLC).

[6] In order to complete its functionality, IBM Engineering Requirements Management DOORS Next has an open architecture that supports third-party plugins.

DOORS was originally published by Quality Systems and Software Ltd (QSS) in 1991.

[7] DOORS is designed to ease the requirements management process with a variety of features: