Why Pharma Is Different
In most plants a field service technician has to be competent and safe. In pharma they have to be compliant as well. The rules that govern how medicines are made reach everyone who touches production equipment, outsiders included.
Good Manufacturing Practice (GMP)
GMP governs how medicines are made, tested and released, and every system that can affect product quality. For a technician that means:
- Work follows the site's documented change control.
- Records are complete, accurate and written at the time of the work.
- A deviation from an approved procedure is documented and investigated, never quietly put right.
Validation and Qualification
Equipment passes formal qualification before it may run product:
- Installation Qualification (IQ): it is installed as specified.
- Operational Qualification (OQ): it operates as intended.
- Performance Qualification (PQ): it performs reliably in production.
A modification can call for partial or full requalification. A change nobody recorded can void the equipment's qualified status.
Cleanroom Environments
Many production areas are classified cleanrooms, with particles, temperature, humidity and pressure differentials monitored all the time.
- Gowning follows the room's grade (A to D), on every entry.
- Only approved tools, materials and consumables go in, and everything that goes in comes out.
- Airlocks and the pressure cascade are respected.
- Maintenance is planned around its effect on the room's conditions.
Data Integrity
Any system that creates, processes or stores GMP data is held to strict rules, and inspectors look at it closely.
- EU GMP Annex 11 and FDA 21 CFR Part 11 for electronic records.
- Audit trails on GMP-critical systems.
- User access controls and role-based permissions.
- ALCOA+: data is attributable, legible, contemporaneous, original and accurate, and also complete, consistent, enduring and available.
Disciplines Most Commonly Needed
A pharma site needs the same trades as any factory, with procedure on top. These four come up most.
Automation and PLC Programming
A change to validated software goes through change control first, however small it is.
- A formal impact assessment before any modification.
- GAMP 5, the industry framework for computerised systems.
- Computerised system validation (CSV) for the change.
- The state before and after, the test protocol and the results, all documented.
Instrumentation and Calibration
Pharma calibration has to be traceable and documented: every result recorded and shown to sit inside its uncertainty limits.
- Reference standards with valid, traceable certificates.
- Measurement uncertainty worked out against the acceptance criteria.
- Any out-of-tolerance result investigated for its effect on product.
- As-found and as-left readings recorded for every instrument.
HVAC and Cleanroom Systems
The HVAC keeps the cleanrooms within specification, so it is treated as process equipment.
- HEPA filter integrity testing (DOP or PAO aerosol challenge).
- Airflow visualisation, or smoke studies.
- Calibration and maintenance of the environmental monitoring system.
- Air handling unit maintenance that does not contaminate the areas it serves.
Mechanical and Utility Systems
Mechanical work has to respect hygienic design and the material rules for surfaces that touch product.
- Hygienic design: crevice-free, drainable and cleanable.
- Pharmaceutical-grade stainless steel welding, typically orbital, checked with a borescope.
- Purified water and water for injection (WFI) systems.
- Clean steam generation and distribution.
What to Look For When Hiring
The usual mistake is hiring a strong technician who has never worked under GMP. The technical work can be excellent and still cause trouble. On a pharma site the paperwork and the pace are part of the work.
Previous GMP Experience
Usually the most important factor. Someone who has worked under GMP knows the documentation, the pace of change control and what non-compliance costs. They will not make an undocumented change to get a line running again. Habits that are fine in an unregulated plant do real damage here.
Documentation Standards
If it is not documented, it did not happen. The technician has to write accurate, legible records of every action without fuss: logbook entries, completed pre-approved work orders and a service report that stands up to an audit.
Change Control Understanding
A pharma technician cannot fix the fault and move on. A deviation from the specification, a replacement part that is not identical, or any change to software or hardware goes through the site's change control. It feels slow to people from other industries, but it is not optional.
Compliance Training Records
Sites usually want evidence of GMP training before they give access. Many run their own induction too, so build that time into the schedule.
Pace of Pharma Field Service
Expect everything to take longer. A repair that takes two hours in a food plant can take a full day in a pharma plant once change control, documentation, gowning and the checks after the work are counted. Say in the mission brief that the site is GMP, so technicians can price the time and plan for it.
Disclaimer: This guide is general information, not professional, legal or regulatory advice. GMP requirements and site procedures differ, so check what applies to your site with its quality unit before acting on anything here. FindFST accepts no liability for decisions made on the basis of this guide.
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