Buyer's Guide

Hub-plus-tools vs one system of record

How to choose between a requirements hub with integrations and one connected system of record — the architectural question behind Jama-style stacks, overlays, and consolidated ALM.

By traceunified ·

Most ALM evaluations pretend the question is feature parity. For regulated teams, the real fork is architectural:

  1. Hub-plus-tools — a requirements (or compliance) hub integrated to separate test, risk, modeling, and SBOM tools — or an overlay that sits on Jira/GitHub/TestRail.
  2. One system of record — requirements, architecture, tests, risk, and SBOM as records in one database, with intrinsic traceability.

Both can pass a checklist. They fail differently under change and audit. Use this guide with Choosing requirements and traceability software.

What hub-plus-tools optimizes for

  • Keep engineering tools teams already know
  • Best-of-breed depth in each discipline
  • Incremental adoption (“just add a connector”)

Cost you pay: integration upkeep, reconciliation of IDs, validation of every connector, and suspect/impact that stops at the tool boundary unless someone rebuilds the matrix.

What one system of record optimizes for

  • One graph for coverage, impact, and evidence
  • Fewer licenses and validation surfaces
  • Native MBSE, ISO 14971 risk, and SBOM on the same thread

Cost you pay: change management — authors may leave a familiar hub or Jira-centric workflow. Migration is real work (ReqIF, CSV, XMI) — see the migrate-from-* guides.

Overlay is a third shape

Compliance overlays (e.g. Ketryx-class products) keep authoring in eng tools and generate evidence across connectors. Evaluate them as hub-plus-tools with a compliance brain — not as a system of record. Ketryx alternatives and Migrate from Ketryx spell out that fork.

A simple decision test

Ask every vendor to demonstrate, live:

  1. Change a requirement — which tests, risks, and model elements flag, in which systems?
  2. Land a CVE on a component — does residual risk and verification update without a spreadsheet?
  3. Produce last release’s coverage evidence from current data in under an hour.
  4. List every system in the assurance case that must stay validated.

If the honest answer spans five products, you have a hub-plus-tools architecture — even if the slide says “platform.”

When to stay on a hub

Stay when integrations are already validated, authors will not move, and the hub is truly the center of gravity. Move when drift, stack cost, or audit assembly time dominate. Product pages like Platform and the compare hub exist to stress-test that choice — not to pretend one answer fits every program.

See traceability work as one connected system.

Requirements, architecture, tests, risk, and SBOM on a single thread — audit-ready when you need it.

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