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Glossary > ALCOA+

ALCOA+

weasl Author Maren Fichtner
Author: Maren Fichtner | August 27, 2026

Definition: What is ALCOA+?

ALCOA+ is a framework consisting of nine principles for data integrity in GMP-regulated environments, recognized by the FDA and the EMA. It requires that data—whether recorded on paper or electronically—be attributable, legible, timely, true to the original, accurate, complete, consistent, persistent, and available—and forms the substantive foundation upon which technical requirements such as EU GMP Annex 11 or FDA 21 CFR Part 11 are based.

Recognized by: the FDA and EMA as part of their data integrity guidelines

Context: GMP-regulated environments (pharmaceuticals, active pharmaceutical ingredients)

Who is ALCOA+ intended for?

These principles apply to all companies that generate, process, or store data as part of GMP-regulated processes—in particular, pharmaceutical manufacturers, active ingredient manufacturers, and contract research organizations. They can be applied regardless of production methods or systems, ranging from handwritten batch records to fully digitized manufacturing processes.

Overview of Core Requirements

  • Attributable: Each data entry is uniquely associated with a person and a specific point in time

  • Legible: Data is permanently legible and is not compromised by illegible handwriting or loss of format

  • Contemporaneous: Recorded immediately upon performing the activity, not reconstructed retrospectively

  • Original (true to the original): primary data or a verified copy; no unauthorized intermediate steps

  • Accurate: Values that arecorrect , error-free, and consistent with the actual event

  • Complete, Consistent, Enduring, Available: records that are complete, internally consistent, permanently preserved, and accessible at any time

Difference from EU GMP Annex 11

ALCOA+ describes the fundamental, system-independent principles of data integrity. It defines the characteristics that data must have, regardless of how it is generated. EU GMP Annex 11, on the other hand, specifies how computer-based systems in particular must technically implement these principles: through validation, audit trails, access controls, and electronic signatures. Put simply, ALCOA+ is the substantive goal, while Annex 11 is a technical means of achieving that goal using digital systems.

Consequences of Noncompliance

Violations of ALCOA+ principles are among the most common and serious types of findings during GMP inspections by the FDA, EMA, and national authorities—such as handwritten corrections without a countersignature, values added retroactively, or incomplete batch records. Such data integrity deficiencies are considered particularly critical because they raise fundamental doubts about the reliability of all production data and can lead to batch holds, warning letters, or the revocation of manufacturing authorization.

Related Standards

  • EU GMP Annex 11 – Requirements for Computerized Systems

  • FDA 21 CFR Part 11 – U.S. Requirements for Electronic Records and Signatures

  • FDA cGMP – U.S. Requirements for Drug Manufacturing

  • EU GMP – European Guidelines on Good Manufacturing Practice

Frequently Asked Questions About ALCOA+

Is ALCOA+ required by law?

Not directly, but the FDA and EMA use it as the basis for their data integrity guidelines and evaluate inspections accordingly.

What do the letters stand for?

Attributable, Legible, Contemporaneous, Original, Accurate—supplemented by Complete, Consistent, Enduring, and Available.

What is the difference from Annex 11?

ALCOA+ refers to the substantive principles, while Annex 11 governs their technical implementation in computer-based systems.

Does ALCOA+ apply only to electronic data?

No, this applies equally to paper and electronic records, although it is easier to implement reliably in electronic form.

Successfully Implementing ALCOA+

weasl Factsheet

The most common ALCOA+ violations do not result from intent, but from structural weaknesses in paper-based processes: values are added retroactively, corrections are made without a countersignature, and entries are illegible. Connected worker platforms like weasl implement ALCOA+ structurally, rather than relying on the discipline of individual employees: Every entry is automatically tagged with attributes, time-stamped, and immutable; no step can be skipped or altered retroactively.

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