In the process of GMP certification and audit in pharmaceutical factories, many enterprises have invested a large amount of funds in workshop decoration, equipment upgrades, and purification system construction. The hardware conditions have no obvious shortcomings, but audits still frequently encounter situations such as deadline rectification, suspension of work for verification, and even affecting production qualifications. Based on our years of experience in pharmaceutical purification engineering and audit rectification projects, we have found that the majority of GMP audits do not pass, and the problem lies not in the equipment and decoration itself, but in the following three easily overlooked details and loopholes.
1、 Neglecting pressure gradient control, chaotic or backflow pressure difference in clean areas
Some companies only focus on hardware configurations such as fresh air systems and high-efficiency filters during purification renovations, mistakenly believing that the installation of equipment in place represents workshop compliance. In fact, the core of GMP purification workshop lies in the gradient pressure difference between areas, rather than simply surface decoration.
The compliance workshop should strictly follow the pressure gradient of "clean area>buffer room>corridor>non clean area" to ensure that the airflow flows unidirectionally from the high cleanliness area to the low cleanliness area, thereby effectively blocking the invasion of external dust and microorganisms. If the pressure difference in each region remains constant, approaches or even causes backflow, it will directly pose a risk of cross contamination. This is also one of the key verification contents in the new GMP audit.
2、 The hardware facilities are complete, but the software records are not authentic and closed-loop
Many workshops have clean on-site environments and compliant equipment, but ultimately lose points in audits due to several record sheets. The core logic of GMP audit is "traceability of everything and traceability of data", and record files are equally important as hardware facilities.
Cleaning and disinfection records, equipment maintenance records, filter replacement ledger, consumables batch records, etc., once there are omissions, supplements, inconsistent data, and date confusion, even if the on-site management is standardized, auditors may still determine that the workshop compliance is not up to standard, and even affect the validity of production data. Therefore, the closed-loop management of software materials must be promoted synchronously with hardware construction.
3、 The personnel operation was superficial, and the air shower and changing procedures were not strictly implemented
Facilities such as air shower rooms and buffer changing rooms have been widely used in pharmaceutical factories, but the problem of non-standard operation is still very prominent. It is not uncommon for multiple people to be exposed to the air at the same time, insufficient exposure time, incorrect changing order, and entering the workshop without changing into clean clothes.
Personnel are the biggest source of pollution in clean areas, and long-term non-standard operations can continue to introduce dust and microorganisms, leading to unstable maintenance of workshop cleanliness. During the on-site inspection of GMP audit, auditors may randomly inspect employees' practical operations. Once the process execution is found to be inadequate, it may directly determine that the cleanliness control is ineffective, affecting the audit results.
Summary
The GMP workshop audit competition is never about equipment prices and decoration grades, but about the stability of pressure gradient, the closed-loop recording of data, and the standardization of on-site operations. Hardware is the foundation, details are the key to determining whether an audit can pass smoothly.
If your company is planning to undergo a GMP audit in the near future, or wishes to investigate in advance whether there are similar implicit compliance risks in the workshop, please feel free to contact our purification engineering team. We will provide comprehensive compliance checks and improvement suggestions to help enterprises pass audits smoothly and reduce rectification costs.