This is a ready-to-use risk classification matrix for scoping which systems and processes a Validation Master Plan governs, and at what rigor. Replace every <<FILL: ...>> placeholder, adapt the tier definitions to your own program if warranted, and route the completed matrix through document control as an attachment or section of your VMP. A filled specimen follows.
Document control header
| Field | Entry |
|---|---|
| Document title | Validation Risk Classification Matrix for <<FILL: site / program>> |
| Document number | <<FILL>> |
| Version | <<FILL>> |
| Effective date | <<FILL>> |
| Parent VMP reference | <<FILL: VMP document number>> |
| Owner | <<FILL>> |
1. Purpose
This matrix scores every system, process, and computerized system within the parent VMP’s scope against a defined GxP-impact tier, so that validation rigor and periodic review frequency are assigned by a consistent, documented method rather than negotiated case by case.
2. Methodology
Apply the GxP-impact test to each item: does it create, modify, store, or affect data or decisions that bear on product quality, patient safety, or data integrity. An item that clears the test is scored into Tier 1 or Tier 2 based on whether its impact is direct or indirect. An item that does not clear the test is Tier 3, excluded from formal validation scope, with the rationale recorded in this matrix rather than the item simply being absent from it.
3. Tier definitions and scoring criteria
| Tier | Definition | Scoring question | Validation approach | Periodic review interval |
|---|---|---|---|---|
| Tier 1 | Direct impact on a quality decision, product disposition, or patient safety | Would an error here reach a batch release decision, a CQA result, or patient safety without an independent check catching it first | Full qualification/validation; for computerized systems, full CSV plus a data integrity risk assessment | <<FILL: e.g. 12 months>> |
| Tier 2 | Indirect impact; supports a Tier 1 decision or system but does not itself make the decision | Would an error here need to propagate through a Tier 1 system or step before affecting product quality or patient safety | Risk-scaled qualification, narrower scope and testing depth than Tier 1 | <<FILL: e.g. 24 months>> |
| Tier 3 | No GxP impact | Does this item touch product quality, patient safety, or data integrity at all, directly or indirectly | Excluded from formal validation scope | Not applicable; re-score if the item’s use changes |
4. Assessment table
| System / process | Description | GxP-impact test result | Tier | Validation approach applied | Periodic review interval | Rationale |
|---|---|---|---|---|---|---|
<<FILL>> | <<FILL>> | <<FILL: pass/fail, direct/indirect>> | <<FILL: 1/2/3>> | <<FILL>> | <<FILL>> | <<FILL>> |
<<FILL>> | <<FILL>> | <<FILL>> | <<FILL>> | <<FILL>> | <<FILL>> | <<FILL>> |
Add one row per system or process in the parent VMP’s inventory. A row scored Tier 3 still needs a rationale entry; “not applicable” is not a rationale.
5. Escalation for disputed classification
Where a system’s tier is disputed between the validation lead and the system owner, Quality Assurance makes the final call, per the roles assignment in the parent VMP, and the decision and its reasoning are recorded in this matrix, not resolved verbally.
6. Revision history
| Version | Date | Author | Summary of change |
|---|---|---|---|
<<FILL: 1.0>> | <<FILL>> | <<FILL>> | Initial issue. |
7. Approvals
| Role | Name | Signature | Date |
|---|---|---|---|
| Author (Validation) | <<FILL>> | ||
| Reviewer (System owner) | <<FILL>> | ||
| Approver (Quality Assurance) | <<FILL>> |
Filled specimen
Two contrasting rows from a clinical-stage cell therapy program’s actual matrix.
| System / process | Description | GxP-impact test result | Tier | Validation approach applied | Periodic review interval | Rationale |
|---|---|---|---|---|---|---|
| Chromatography data system (CDS) | Generates and stores release-testing chromatograms and calculated results for drug substance purity | Pass, direct: CDS results feed the release decision without an independent recalculation step | 1 | Full computerized system validation, data integrity risk assessment covering audit trail review and access control, 12-month periodic review | Direct impact on a quality decision; an undetected calculation or data-integrity error here reaches the batch disposition | |
| Shared team calendar / meeting scheduler | Internal tool used to schedule cross-functional meetings | Fail: tool holds no product, process, or quality data of any kind | 3 | Excluded from formal validation scope | Not applicable | GxP-impact test fails on every criterion; excluded and recorded here so the exclusion is a documented decision, not a gap discovered later |
| Environmental monitoring trend software | Aggregates viable and non-viable particulate counts from classified manufacturing spaces for periodic review | Pass, indirect: trends inform facility qualification status but do not themselves release a batch | 2 | Risk-scaled qualification: functional testing of trend calculations and alarm thresholds, no full CSV data integrity assessment | Indirect impact; supports the facility qualification status that Tier 1 systems ultimately depend on, but does not itself make a release decision |
Common inspection findings this matrix prevents
- A system’s validation rigor decided informally, with no documented scoring against a consistent tier definition, so two similar systems in the same program end up at different rigor for no traceable reason.
- A Tier 3 exclusion with no rationale recorded, indistinguishable from an oversight when reviewed later.
- A disputed classification resolved verbally with no record of who decided or why.
- Periodic review intervals that do not match the tier assigned, or that were never assigned an interval at all.
How to adapt this matrix
- Confirm the tier definitions in Section 3 match your organization’s own risk framework if one already exists; do not run two inconsistent frameworks in parallel.
- Populate Section 4 from your actual system and process inventory (see the paired GxP System and Process Inventory Register), not a generic list copied from another program.
- Route disputed classifications through Section 5 and keep the record, not a verbal resolution.
- Re-score any item whose use or configuration changes materially, rather than assuming its original tier still applies indefinitely.