Definition

An audit trail review is a formal review of system-generated audit trail entries associated with critical GxP records, system functions, data changes, user activity, or administrative events.

The purpose is to determine whether the data and system activity remain trustworthy, complete, and consistent with approved procedures. Audit trail review is especially important for records that support batch release, laboratory results, quality decisions, process monitoring, and regulatory submissions.

Audit trail review can occur as part of routine record review, batch release, laboratory result approval, periodic system review, deviation investigation, CAPA, or inspection readiness activities.

Why Is Audit Trail Review Important?

Audit trails only provide compliance value when they are reviewed in a meaningful way. If audit trails are enabled but never reviewed, organizations may miss unexplained changes, unauthorized activity, data manipulation, configuration changes, or procedural gaps.

Regulators expect organizations to understand which data are critical and to review audit trails in a manner appropriate to risk, record criticality, and intended use.

• Supports detection of unauthorized or unexplained data changes
• Provides evidence that electronic records were reviewed appropriately
• Strengthens batch release, laboratory result approval, and quality decision processes
• Supports investigations, deviations, CAPA, and trend analysis
• Helps identify system configuration, access control, or procedural weaknesses
• Improves inspection readiness for data integrity topics

What Should an Audit Trail Review Include?

Audit trail review procedures should define scope, frequency, roles, documentation expectations, escalation pathways, and review criteria.

A practical review process usually includes:

• Identification of critical records, data fields, and system events
• Defined review frequency based on data criticality and process risk
• Clear reviewer roles and independence expectations
• Review of creation, modification, deletion, processing, approval, and administrative events
• Assessment of changes to critical data or metadata
• Investigation of unexplained, unauthorized, or unusual activity
• Documented review outcome and any required follow-up actions

Types of Audit Trail Review

Not every audit trail review has the same purpose. Organizations should define review models that match the system, record, and risk profile.

Record-Based Review

Audit trail entries are reviewed with a specific record, batch, sample, test, or transaction before approval or release.

Periodic Review

Audit trail activity is reviewed at planned intervals to confirm ongoing control, identify trends, and detect unusual activity that may not be tied to a single record.

Exception-Based Review

Review focuses on filtered exceptions, such as deleted records, changed results, failed login attempts, unauthorized access, alarm overrides, or critical configuration changes.

Investigation-Driven Review

Audit trails are reviewed as part of deviation, CAPA, laboratory investigation, complaint, or inspection response activities.

Common Audit Trail Review Challenges

Audit trail review programs often become difficult when systems generate large volumes of poorly organized data or when procedures do not clearly define what reviewers should evaluate.

Common challenges include:

• No approved procedure defining review scope or frequency
• Reviewers are not trained to interpret system audit trail entries
• Audit trail reports lack filters, context, or user-friendly exports
• Review responsibilities are assigned without independence or escalation criteria
• Critical data fields are not identified
• High-volume audit trails create review fatigue
• Findings are not linked to deviations, CAPA, or trend analysis

Best Practices for Audit Trail Review

• Use risk assessment to define which audit trails require review
• Identify critical data and critical system events before writing procedures
• Define review timing, frequency, acceptance criteria, and escalation pathways
• Train reviewers on system-specific audit trail terminology and expected workflows
• Validate audit trail reporting and filtering functions where applicable
• Document review outcomes clearly and consistently
• Trend recurring audit trail findings to support continuous improvement

How Mangan Biopharm Supports Audit Trail Review Programs

Mangan Biopharm supports organizations developing or improving audit trail review programs across laboratory, manufacturing, quality, facility, and automation systems.

Support may include audit trail risk assessments, procedure development, CSV test planning, system report verification, reviewer training support, data integrity assessments, remediation planning, and periodic review execution.

By connecting audit trail review expectations to system validation, data integrity, and inspection readiness, Mangan Biopharm helps organizations create practical review processes that can be sustained over time.