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Manufacturing discipline that satisfies the inspectorate and the buyer
A buyer has asked to inspect your plant, or a licence renewal is coming and the last inspection left observations open. Good Manufacturing Practice covers how a facility is built, cleaned, staffed and documented so that product quality is designed into the process rather than sorted out at release.
You need GMP if…
- !Your first purchase order is sitting behind a plant inspection date and a GMP certificate the customer wants first.
- !A licence renewal is due and the last inspection left major observations that were never formally closed.
- !You are moving from non-sterile to sterile production and the existing HVAC and gowning arrangements will not carry it.
- !Batch records rejected in a contract client’s audit because entries were written up at shift end rather than as work happened.
- !A distributor in a regulated market wants evidence of GMP conformity before it will register your product.
- !Recurring deviations, repeat out-of-specification results and a CAPA log that never closes are drawing attention.
The rules for how a plant that makes medicines, devices, supplements or food must be laid out, cleaned, staffed and recorded, so that every batch is made the same way and can be traced afterwards.
GMP is a regulatory expectation, not one certificate. National inspectorates issue GMP certificates against their own scheme; accredited bodies such as SIS audit and issue a conformity certificate buyers accept.
Third-party GMP certificates usually run one to three years with a yearly audit; inspectorate certificates track the licence and its own renewal cycle.
Pharmaceutical, nutraceutical, device, food and tobacco manufacturers, plus contract sites whose customers hold the licence and carry the regulatory exposure.
Where this certification is demanded
GMP is applicable across 4 of the 25 industries SIS covers. The pages below set out the specific reason it comes up in each one.
What GMP Actually Requires
The backbone an implementer has to build, in the order it usually gets built.
Layout that separates people from materials and clean from dirty, with defined air classes, airlocks, cleanable finishes, and no path that lets rejected material drift back into production.
Quality assurance and quality control that report outside production, hold batch release authority, and cannot be overruled by a despatch date.
Equipment, HVAC and water systems qualified through installation, operation and performance stages; process and cleaning validation with recovery studies and a stated revalidation trigger.
Master formulae and batch manufacturing records filled in as work happens, signed, reconciled for yield, and retained with samples for the shelf life plus a defined margin.
Health checks, gowning matched to the area class, defined behaviour in clean zones, and training records that connect a named person to the job they actually do.
Deviation and out-of-specification investigation that finds a cause, change control before the change, complaint handling, self-inspection, and a recall procedure tested by mock recall.
How GMP Audit Works
No black box. A defined, time-bound route from first call to audit certificate in hand.
Scheme & Scope Selection
Which GMP the audit runs against - WHO, a regional pharmaceutical code, a national schedule, or food and supplement GMP - plus dosage forms, blocks and whether sterile production is in scope.
2–5 daysDocumentation & Facility Gap Review
The one that costs months is HVAC. A layout change went in three years ago, the qualification was never redone, and every pressure differential record since sits on an unproven basis.
2–6 weeksOn-site GMP Inspection
Auditors walk the material and personnel flow, check pressure differentials and gowning against records, open a completed batch record and reconcile it, and follow one product from dispensing to release.
2–4 days on siteObservations Closed, Certificate Issued
Critical and major observations close with evidence before the certificate issues. The annual re-audit heads straight for your deviation log and mock recall. A regulator’s own licence inspection stays separate from it.
Annual re-auditIndustries That Need GMP
Commonly taken alongside
Not Sure Which Certification You Need?
Three questions. The selector reads the same industry-to-standard mapping this whole site is built on, then shortlists what applies to you.
Which sector best describes your organisation?
Most GMP audits are lost in the paperwork, not the plant
It is almost never the equipment. It is a cleaning validation limit with no recovery study behind it. Show us that one document and we will tell you how the audit grades.
Get My Free Quote →What GMP Changes for Your Business
Certification is not a certificate on the wall. It is a working system that pays for itself.
Batches that release cleanly
Validated processes and complete records cut the rejections, reworks and held batches that eat margin and push delivery dates past what the customer agreed.
Fewer buyer audit findings
Corporate and export buyers audit against GMP expectations. A site already audited to the scheme turns a three-day customer inspection into a formality.
Licence exposure reduced
Observations in a regulatory inspection can suspend a plant licence. Finding them in a third-party audit first is far cheaper than finding them in an official one.
Access to regulated markets
Importers and distributors in regulated markets ask for documented GMP conformity before registering a product. Without it the file stops at the first review.
Contamination controlled by design
Air classification, directional flow and cleaning validation stop cross-contamination at source. On shared equipment running multiple products, that design is the only thing between one batch and the next.
Records that survive scrutiny
Contemporaneous, attributable and legible records are what an inspector actually tests. Data integrity problems close plants faster than equipment problems do.
Knowledge Base - Downloads
Practical documents prepared by our auditors. Fill the short form once and every download on the page unlocks.
GMP self-inspection checklist for manufacturing sites
Area-by-area questions covering premises, utilities, documentation, materials and quality control, written the way an auditor actually works through a plant.
Site master file structure and content
A section-by-section outline of what a site master file must contain and the level of detail inspectors expect to find in each part.
Cleaning validation without the guesswork
How to choose the worst-case product, set acceptance limits, run swab and rinse sampling, and decide when revalidation is triggered.
Data integrity in GMP records
Why contemporaneous entries, audit trails and controlled access decide inspection outcomes more often than equipment or facility issues do.
Frequently Asked Questions
Straight answers to what buyers ask before they commit to GMP.
Is GMP an ISO certification with a three-year cycle?
Does a third-party GMP certificate replace an inspectorate certificate?
Which GMP scheme should we be audited against?
What usually fails a GMP audit?
Can a GMP audit be combined with ISO 9001 or ISO 13485?
We make nutraceuticals, not medicines. Does GMP apply?
Book a GMP audit for your site
The scheme decides everything here, and it is set by your customer’s market rather than by you. Name the buyer and we can name the scheme.
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