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Everything you need to know about Good Manufacturing Practices (GMP) Audit
Good manufacturing practices (GMP) are practices that conform to a standard or regulation governing the production of a safe and effective product. Products commonly subject to GMP standards and regulations include medical devices, pharmaceuticals, dietary supplements, food, beverages, and cosmetics. All these industrial categories directly impact human health, so the activities of producers are naturally subject to exacting standards. In general, good manufacturing practices lead to a good quality product. They are important because not all aspects of quality can be verified in the final product (for example by testing each individual pill), so good practices must be built into production.
A GMP audit is a systematic, objective assessment of whether the organization has implemented these practices. The following article will introduce you to GMP audits and their importance and link to Pro QC’s GMP audit services.
The United States FDA developed good manufacturing practice regulations in response to laws enacted by the US Congress. These laws were developed in response to increasing public concern and scrutiny of food and drug manufacturers, prompted by numerous scandals and instances of malfeasance. Some of these events included poisonings, deaths, lifelong deformities, and outbreaks of infection.
Today, numerous standards bodies and governments publish GMP guidelines and regulations. Depending on the source, the GMPs may be legally enforceable or simply good practices where the manufacturer gains a marketing edge by demonstrating that they follow the standards. For example, a medical device manufacturer in the US must follow the FDA GMP regulations governing safety and effectiveness. A cosmetics manufacturer wishing to import into a European Union country must follow the GMP guidelines of the European Union. Both of these sets of GMPs have the force of law since they are regulations.
As another example, a cosmetics manufacturer operating in India might follow the international standard “ISO 22716 Cosmetics — Good Manufacturing Practices (GMP) — Guidelines on Good Manufacturing Practices.” This is a GMP standard, not a regulation, which means that following it helps ensure quality, but it does not equate to a legal standard.
To further complicate things, a GMP standard may be more exacting than the law, or vice versa. In addition, a country’s law may exceed the standard, or the standard may exceed the law, and both may cite each other in their texts. Lastly, a government or standards body may publish an additional layer of “harmonizing” documents intended to reconcile all these regulations and standards and make them easier for various manufacturers to understand and follow.
A GMP audit is an essential part of the overall quality program at a supplier. A GMP audit is a systematic examination of an organization’s practices as they relate to the relevant standard or regulation. Ideally, this audit is conducted by a third party to attain objectivity and detachment. The audit should also go beyond simply listing nonconformances but also include potential opportunities for improvement (OFI).
The objective of the audit is typically to indicate the overall state of compliance, allowing a partner to decide if and how to continue the business relationship. The audit findings must ultimately result in actions to fix nonconformances and prevent a recurrence.
A well-conducted GMP audit will include:
The opening meeting is the place to discuss the audit plan and make arrangements for tours and other inspections. An auditee point person or representative will make introductions and provide any other needed logistical info.
It is a good time to reiterate the scope of the audit (what standards and regulations will be audited against) and any areas of emphasis (such as follow-up items from a previous audit or client-specific production lines). This is also the time to envoke a friendly, collaborative tone and rapport, set aside a conference room as the day’s home base, and get any other company or personnel information needed for the audit report.
A tour may be done first in the day, last, or not at all in the case of a paper audit. During the pandemic era, some audits went entirely remote, with company personnel carrying a live camera while the auditor watches and asks questions from their office.
The tour may focus on a client-specific production area or a testing area. It may focus on packaging, shipping, labeling or any number of other areas. The auditor will, with advance permission, photograph relevant areas to support the audit report, such as critical machinery, testing areas, signs of pests, the exterior of the building, or the production line.
A record is generally defined as a historical file that indicates what was done. Examples include a maintenance log on a critical machine, a calibration log, or a cleaning log. Under GMP, these are often subject to retention schedules.
If an auditor asks for 5 years of calibration logs for a piece of testing equipment, these records will provide objective evidence of the equipment’s state of calibration during that period. Another example is employee training checklists, certificates and diplomas. Records point to who did what and when.
A document is generally defined as a content file that is editable and revisable under a controlled system of revision. A standard operating procedure, a corporate policy manual, or a facility map are all documents.
An auditor will examine these documents to assess compliance with GMP. For example, if the relevant GMP standard requires that a quality control unit be established and documented, then the auditor will ask for the documents (such as SOPs and testing protocols) that this unit uses in their work.
The auditor may interview production line staff or management. Auditors will ask clarifying questions about procedures and training. Some auditees may choose to make only management available for interviews. Others may freely allow frontline staff to be interviewed.
It is important to note that an auditor is not looking for “gotcha” moments or finding fault, but rather to gain an objective view of the state of GMP compliance of the organization. Thus, an auditee should give employees basic coaching on how to answer an auditor’s questions, but not train them to be tight-lipped or to give canned answers.
The closing meeting is where the day wraps up and any preliminary audit findings and observations are presented. Serious findings should be brought up immediately and formally detailed later in the audit report that will follow. This is the time to thank all participants and end on a good note, with an estimate of when to expect the report.
An audit against the US FDA’s GMP requirements for medical devices will include the following areas:
The purpose of a GMP audit is to provide an assessment of the company’s state of GMP compliance and ultimately lead to corrective and preventive actions addressing any nonconformances. The following is a finding from a Pro QC audit report on a cosmetics manufacturer.
Pro QC Report Example – Audit Score and Summary
Pro QC Report Example – Recommended Corrective Actions
ISO 22716:2007 Cosmetics — Good Manufacturing Practices (GMP) — Guidelines on Good Manufacturing Practices, Section 4.7
Is there adequate lighting, that is sufficient for operations, installed in all areas?
1) Record of light intensity.
2) Device to measure light
The lighting intensity looks sufficient at the moment. However, there is no device for measuring the intensity, no plan and no record.
I (improvement needed)
In this example, the audit report cited the applicable standard the factory was audited against, cited objective evidence (a light measuring device), the finding, and an indication of the state of compliance (compliant, needs improvement, or non-compliant). The audit report highlights this potential nonconformance in yellow and ranks it according to severity to allow the auditee to act in a prioritized manner.
The audit sponsor can expect a comprehensive and organized report with a statement of overall GMP compliance of the auditee, detailed and prioritized audit findings, and recommended corrective actions. The report will include a recommendation on the risk involved in partnering with the audited supplier.
See Pro QC’s suite of GMP audit services and sample audit reports here.
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Pro QC has been providing quality assurance, engineering and consulting services since 1984.
We offer quality solutions in over 88 countries and we are continuously expanding our network.
We offer online reporting and detailed reports within 24 hours of job completion.
Our global engineering team has the requisite industry expertise to verify quality and conformance.
Quality assurance, supplier development and factory consulting services provided since 1984. We offer solutions in over 88 countries.
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