ALCOA+ Data Integrity Explained: ALCOA+ is a common shorthand for trustworthy records: attributable, legible, contemporaneous, original and accurate, together with qualities such as complete, consistent, enduring and available.
Why professionals need this knowledge: Trustworthy data depends on system design and human practices throughout the lifecycle, not only on laboratory notebooks or electronic signatures.
Step 1: Map where important data originate, who can enter or change them and which systems preserve audit trails.
Step 2: Set role-based permissions, time synchronisation, backup, review and correction processes proportionate to the data risk.
Step 3: Test real situations such as transcription errors, missing values, system outages and authorised corrections.
Worked example: A trial coordinator corrects a visit date in an electronic form. The system should retain who changed it, when, why and the previous value where required.
What to avoid: Sharing logins, backdating entries or converting an original digital record to an uncontrolled screenshot. An apparently neat form is not a substitute for reliable actions and sound judgement in the real workflow.
Records and audit trail: Audit logs, access reviews, change reasons, source data, backup tests and reviewer sign-off. Accurate records enable independent review and appropriate follow-up when concerns arise.
Try this exercise: Choose one critical data field and trace its complete journey from source through analysis and reporting. Discuss the exercise with an appropriately qualified colleague before applying it to a live case.
Standards and references: Applicable GxP data integrity guidance, including relevant WHO and regulatory publications. This is educational material; the approved protocol, governing standard and local law take precedence.
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