Managing requirements for multiple product variants is a problem due to the difficulty of specifying how requirements may vary between products. DOORS users now have a solution to this problem - pure::variants Synchronizer for DOORS - an add-in for the pure::variants variant management toolset - that allows your existing DOORS Requirements Models to be modelled as pure::variants Feature Models. The Synchronizer uses existing DOORS® modules as the basis for variant management no further work is required in DOORS to get started. It supports traceability and thus makes it easy to report on which requirements have been incorporated into which variants. During variant assembly problems are automatically detected and resolved for example when conflicting requirements are specified.