This article is part of Arc’s requirements management software comparison library, where every shortlisted approach is assessed with the same programme-level criteria.
DOORS is often a continuity decision; Polarion is often an ALM operating-model decision. An established IBM baseline, supplier exchange or DXL report can be harder to replace than a requirements editor. Polarion can be attractive when software lifecycle work is moving into a shared Siemens environment. This Arc-authored comparison is based on published documentation and a proposed evaluation method.
Are we evaluating DOORS or DOORS Next?
Classic DOORS modules and DXL-dependent processes are different from DOORS Next in IBM ELM. List the actual modules, link modules, baselines and reports in scope. A procurement table that says only “IBM DOORS” cannot reveal whether Polarion would replace a legacy repository, a web application or a wider lifecycle estate.
What does Polarion add?
Polarion ALM is built around connected work items and application lifecycle processes. That breadth is valuable if software teams, test teams and requirements owners will adopt the same governance. It is overhead if a small subsystem only needs controlled requirements and evidence. Check licence and configuration assumptions for the proposed edition.
How do both handle a supplier change?
In a synthetic radio payload, a supplier updates a frequency stability requirement. Receive the changed specification, trace it to system allocation and an environmental test, then approve or reject it against the existing baseline. Test the supplier's required exchange format and whether link direction, old revisions and acceptance decisions survive. Repeat with the actual IBM application, not a generic DOORS demo.
What should decide the choice?
Keep DOORS when contractual exchange, history and institutional practice dominate. Choose Polarion when the wider Siemens ALM strategy is explicit and the full change chain works for engineers. Include migration and training in both cases. Arc is a third option for a contained space programme seeking reviewable parallel change, provided required exchange is proven.
Frequently asked questions
Does Polarion automatically import a DOORS history?
No blanket assumption is safe. Test content and links separately from historical approvals, reports and baseline meaning.
Why distinguish DOORS Classic and DOORS Next?
Their architecture and workflows differ, so the migration and comparison criteria depend on the exact IBM application.
When should DOORS remain?
When supplier exchange, validated reports or controlled historical baselines create more value than switching tools would recover.
How should the radio-payload supplier change be compared?
Receive the changed frequency-stability specification and follow it to the system allocation and environmental test. Keep the original baseline available while owners approve or reject the proposal. Test the supplier package for link direction, old revisions and acceptance decisions in the exact IBM and Polarion versions.
What should a procurement entry record beyond the name IBM DOORS?
Name Classic DOORS or DOORS Next, the actual modules or project, versions, link structures, baselines and required reports. That identifies whether the decision concerns a legacy repository, a web application or a wider estate. Compare the replacement against that scope rather than a generic requirements editor.