Computer System Validation (CSV)

Lifecycle deliverables

• Validation plan defining scope, approach, roles and deliverables
• User requirements specification written to be testable
• Functional and configuration specifications
• Risk assessment linking functions to product quality, safety and data integrity
• Supplier assessment and leverage rationale
• Test strategy: installation, functional, integration, user acceptance
• Traceability matrix from requirement to test evidence
• Defect management and resolution records
• Validation summary report and release decision

Common system types

• MES and electronic batch records
• LIMS, ELN and chromatography data systems
• eQMS — deviations, CAPA, change control, training, documents
• ERP modules affecting GxP decisions (materials, batch status, distribution)
• Historians, SCADA, BMS and EMS
• Serialization and track-and-trace platforms
• Equipment-embedded and instrument control software

Configuration versus customization

Configured commercial software and custom code carry different risk profiles and warrant different assurance depth. Custom code introduces defects the supplier has never tested; configuration changes can be equally consequential when they alter calculations, workflows, permissions or record retention.

Keeping systems validated

Validation status is a maintained condition. Upgrades, patches, interface changes, new users and new business processes each have the potential to invalidate assumptions made during the original project. A regression strategy tied to risk keeps upgrade cycles manageable.

Validation remediation: close the gaps that matter

Start with an inventory of systems, intended uses, regulated records and current controls. Preserve existing evidence rather than rewriting history or backdating protocols. A gap assessment should distinguish missing documentation from unverified functionality, uncontrolled changes and compromised records. Prioritize by potential impact and define interim controls while permanent corrections are implemented.

• Baseline current configuration and identify unsupported or obsolete systems
• Assign each gap an owner, risk rationale, corrective action and acceptance criteria
• Test affected functions and interfaces; verify record retention, restoration and access controls
• QA-approved closure: evidence reviewed, residual risks accepted and periodic review scheduled