The Validation Master Plan is usually the first document an inspector asks for, and very often the one least connected to what the company actually does. It gets written once for an audit, approved, filed, and then reality moves on without it.
Which is a shame, because a good VMP is genuinely useful: it's the document that says what you validate, how you decide how much, and who signs. Here's what belongs in one and what doesn't.
What it is, and what it isn't
A VMP is a programme-level document. It describes your validation approach across the site or organisation: scope, governance, methodology, responsibilities, and how you keep validated status alive.
It is not a validation plan for one system. That document — often called a VP or CSVP — covers a single system: its requirements, its risk assessment, its testing, its acceptance criteria. People conflate the two and end up with either a VMP full of system detail that dates instantly, or a system plan pretending to be a programme document.
Useful test: if a sentence would change when you buy a new LIMS, it belongs in the system plan, not the VMP.
What belongs in it
- Scope. Which sites, systems and processes it covers — and explicitly what it does not.
- How you decide what is GxP-relevant. The criteria, not the list. See what makes a system GxP-relevant.
- Your risk methodology. How risk is assessed and how the result changes validation effort. This is the heart of the document under CSA.
- System categorisation. How GAMP categories are assigned and what each implies for deliverables.
- The deliverable set. Which documents exist at each category and risk level, and who approves each. See roles and responsibilities.
- Lifecycle maintenance. Change control, periodic review frequency by risk, revalidation triggers, decommissioning.
- Supplier management. How supplier evidence is assessed and leveraged.
- Training and competence for people performing validation.
- A system inventory — or better, a reference to the inventory, so the VMP doesn't go stale every time a system is added.
What to keep out
- Detail about specific systems. It ages badly and forces a VMP revision for routine change.
- The inventory itself, embedded. Reference it; a living list maintained elsewhere stays accurate.
- Project timelines. They belong to projects.
- Copied regulation. Reproducing Annex 11 clauses adds pages and no control. Reference and move on.
- Aspiration. If it says you do quarterly periodic reviews and you do not, you have written your own finding.
That last one is the real risk with this document. An inspector reads the VMP first and then checks whether it is true. A modest plan you follow beats an ambitious one you don't, every time.
Keeping it alive
Give it an owner and a review cycle, like any other controlled document. Review it when your approach genuinely changes — a move to risk-based testing, a new categorisation model, a reorganisation of who approves what — not on a calendar reflex.
A short, current VMP that matches practice is worth more than a comprehensive one that describes a company you used to be. If yours has drifted, the fastest honest fix is to rewrite it to describe what you actually do now, then improve the practice and the document together.
For what sits underneath it, see computer system validation, GxP risk assessment, and the tooling landscape in GxP software.
Where to go next
Explore GxP Copilot for AI-native validation, TraceDraft for source-traceable clinical documentation, or book a demo to see either on your own data.