FDA’s requirements depend on the regulated activity and the records a system maintains. The underlying clinical investigation regulations — often called predicate rules — define which records must be created and retained. When those records are kept electronically, 21 CFR Part 11 may apply. It also applies when electronic signatures replace required handwritten signatures.
For closed systems within its scope, Part 11 §11.10(a) requires validation. The goal is accuracy, reliability, consistent intended performance and the ability to discern invalid or altered records. Other provisions cover record copies and retention, authorized access, audit trails, operational checks, authority checks, training and documentation control. Open systems and electronic signatures carry additional controls.
FDA’s October 2024 clinical electronic-systems guidance recommends a risk-based approach to validation. It weighs intended use and the potential impact on participant protection and trial results. FDA’s 2003 Part 11 guidance describes a narrower scope and enforcement discretion for certain provisions. It does not remove the underlying clinical-record obligations. Our approach considers both the applicable regulations and the clinical guidance. We do not treat every software system as subject to identical requirements.
Demonstrate Intended Performance
Establish requirements and acceptance criteria, challenge critical functions and retain evidence showing that the configured system produces reliable results—including under invalid-input and failure conditions.
Protect Records and Accountability
Control access, preserve accurate and complete records, and maintain applicable time-stamped audit trails without obscuring earlier information. Where electronic signatures are used, preserve identity, meaning and linkage to the signed record.
Keep the System Under Control
Use trained personnel, controlled procedures and documentation, and evaluate changes that could affect validated functions. Verification addresses the impact of a change before the revised system is released for use.
Make Evidence Available for Review
Retain validation documentation and protect clinical records for their applicable retention period. Support retrieval and accurate, complete copies so sponsors and inspectors can review the record and its relevant context.
The map below summarizes key provisions, not every obligation in Part 11. Applicability and FDA’s enforcement approach must be assessed alongside predicate rules and clinical guidance. Technical controls and documented operating practices work together. A software feature list alone is not a compliance determination.
Computerized-system validation (CSV) establishes fitness for intended use through objective evidence. Computer software assurance (CSA) emphasizes critical thinking and testing proportionate to risk. FDA’s February 2026 CSA guidance addresses medical-device production and quality management system software. It does not replace the October 2024 guidance for clinical investigation systems. Our approach applies the relevant framework to the regulated activity. We do not treat CSA as a blanket exemption from validation.