Scientific Workflow Change Control Protects Comparability
Holding
Changes to scientific workflows should be assessed for their effect on comparability, not treated as routine maintenance.
Issue
A revised reagent, instrument setting, preprocessing step, or analysis method may improve a workflow while making historical and new results difficult to compare.
Analysis
The failure mode is unclassified change. Teams update a workflow without recording what changed, which datasets are affected, or whether bridging evidence is required.
Resolution
The system should classify changes, identify affected samples and claims, require impact assessment, preserve prior versions, and define validation or bridging tests before release.
Evidence Package
The evidence should include change requests, impact analyses, versioned methods, comparison studies, approvals, rollout records, and rollback plans.
Conclusion
A scientific workflow is controlled when its history explains why results before and after a change remain comparable—or why they do not.