Polarion vs DOORS Next: How the Two Platforms Compare

Who wrote this and how to read it

Corbinsoft is a certified Siemens Polarion partner, and we work only on Polarion. We wrote this Polarion vs DOORS Next comparison to be useful even if you choose DOORS Next. Statements about IBM products come from IBM's public documentation. Both products change between releases, so confirm details against the documentation for the version you would deploy.

The short version: Polarion is a unified application lifecycle management (ALM) platform. IBM Engineering Requirements Management DOORS Next is the requirements application within IBM Engineering Lifecycle Management (ELM). The better fit depends mostly on how much of the lifecycle you want in one repository and how much IBM tooling you already run.

Scope: one repository or a linked suite

Polarion stores requirements, test cases, test runs, tasks, defects, risks and documents as work items in one repository, with one permission model and one workflow engine. A link from a requirement to its test result is a link inside the same database.

DOORS Next concentrates on requirements management. In IBM ELM, test management is handled by IBM Engineering Test Management (ETM) and work and change management by IBM Engineering Workflow Management (EWM), delivered as applications with a Jazz Team Server. The applications link to each other, and to other tools, through OSLC (Open Services for Lifecycle Collaboration).

Source: IBM Engineering Lifecycle Management overview

Both designs are reasonable. A single repository keeps cross-lifecycle queries and reports simple. A linked suite lets each application evolve on its own and connect to third-party OSLC tools.

Document-centric authoring: LiveDocs and modules

Both platforms let engineers write requirements in a document view while each requirement remains an individual, linkable object. This matters to teams coming from DOORS Classic, where the module is how people think about a specification.

In Polarion, a LiveDoc is a rich-text document whose paragraphs can be work items of any type, so one specification can mix requirements, headings, figures and explanatory text. Depending on license tier, Polarion also supports Microsoft Word round-trip, so reviewers outside the tool can comment and edit in Word. In DOORS Next, modules arrange requirement artifacts as a structured, ordered document.

Traceability and reporting

In Polarion, link roles connect any work item types, and coverage, impact and traceability reports run on the same database. LiveReport pages, widgets and Velocity scripting build dashboards and traceability matrices, and documents export to PDF and Word.

In DOORS Next, links between requirements stay within the application, and links to ETM test cases or EWM work items are OSLC links across applications. Cross-project and configuration-aware reporting runs through Jazz Reporting Service Report Builder with the Lifecycle Query Engine, and document-style output comes from IBM Engineering Lifecycle Optimization – Publishing.

Source: IBM ELM reporting overview

Reviews, approvals and electronic signatures

Polarion runs review and approval through workflows on work items and LiveDocs, with electronic signatures attached to workflow transitions. Signers re-authenticate when they sign, and Siemens publishes an electronic records and signatures (ERES) compliance response for Polarion. Validation of your configuration remains your responsibility in a regulated program; our Polarion Part 11 validation service covers that work.

Source: Siemens, ERES compliance for Polarion (PDF)

DOORS Next has a Reviews capability in which reviewers and approvers comment on and approve artifacts. If you plan to rely on it for 21 CFR Part 11 records, check IBM's current documentation for how your version handles electronic signatures, signature manifestation and per-approver records.

Baselines and configuration management

Configuration management is a strength of DOORS Next. Once enabled for a project, it supports streams, change sets and baselines, and global configurations assemble streams and baselines from many components into one configuration. This suits product-line engineering in which many variants share and branch requirements.

Source: IBM documentation, change sets in global configurations

Polarion records every change as a repository revision, so any project or document can be viewed as it was at a past point. Baselines name those points, documents can be branched for variants or releases, and collections group specific document revisions into a consistent set for a release or submission. Teams with heavy parallel variant development should test both models against real scenarios.

Deployment, ReqIF and customization

Deployment options

Polarion runs on-premises or as Polarion X, the Siemens-hosted cloud offering. IBM ELM, including DOORS Next, runs on-premises, on Red Hat OpenShift, or as IBM ELM SaaS.

ReqIF interoperability

Both products import and export ReqIF, the OMG standard for exchanging requirements between organisations and tools. IBM's guidance notes that ReqIF does not preserve links across DOORS Next components, so plan package boundaries around your links.

Source: Jazz.net, ReqIF best practices for DOORS Next

Customization and scripting

Polarion is configured through work item types, custom fields, workflows and link roles, and extended with JavaScript workflow scripts, Velocity in reports, a Java API and a REST API. Our Polarion scripting service builds these extensions. DOORS Next supports client extensions and widgets built with HTML and JavaScript. DXL, the scripting language of DOORS Classic, does not run in DOORS Next, so DXL logic has to be rebuilt on either platform.

Migration path from DOORS Classic

Both vendors offer a route. IBM documents migration packages from DOORS 9 to DOORS Next, designed to run incrementally, alongside ReqIF import. Siemens provides ReqIF import and a DOORS connector for Polarion that synchronises with DOORS Classic in one or both directions, so the tools can run side by side during a phased cutover. Either way, you will need decisions about history, baselines and DXL.

Source: Siemens Polarion blog, DOORS migration

Our DOORS to Polarion migration service and the DOORS survival kit webinar cover the Polarion route in detail.

Polarion vs DOORS Next at a glance

When DOORS Next may fit better

We recommend a serious look at DOORS Next when:

• You already run IBM ELM applications such as ETM, EWM or Rhapsody Model Manager, and your processes depend on the links between them.
• Your product-line strategy relies on streams, change sets and global configurations across many components.
• Customers or prime contractors require you to work in, or deliver into, an IBM ELM environment.
• You want a dedicated requirements application and are comfortable running separate tools for tests and work items.

Choosing between them

Choose Polarion when you want requirements, verification, risk and change in one repository, with document-style authoring and workflow-driven approvals. That combination is especially useful in regulated programs in medical devices, automotive and aerospace and defense, where traceability evidence and electronic signatures carry weight.

Choose DOORS Next when IBM ELM is already your lifecycle backbone, or when its configuration management model is central to how you build variants. In both cases, run a pilot with your own data, your own reviews and your own reports before you decide. If you are still weighing whether you need ALM at all, start with our Why ALM guide.