In pharmaceutical manufacturing, human error is often cited as the leading cause of deviations, non-conformances, and regulatory findings. While humans are naturally fallible, relying solely on “human error” as the explanation during investigations can be misleading and risky.
In Good Manufacturing Practice (GMP) environments, where quality and patient safety are paramount, it’s essential to ask: Is human error truly the root cause, or is it a convenient excuse hiding deeper system issues?
Understanding Human Error in GMP Context
Human error typically refers to unintended actions such as omissions, incorrect operations, or failures to follow procedures. Examples include:
- Forgetting a step in an SOP
- Mislabeling containers
- Incorrect data entry
- Skipping documentation steps
While these mistakes appear simple, regulators like the MHRA, FDA, and EMA expect a thorough root cause analysis—not a superficial attribution.
Why “Human Error” Isn’t Enough
Auditors and inspectors are increasingly critical of investigations that stop at “human error”. Here’s why:
- It lacks depth – It doesn’t explain why the person made the mistake.
- It overlooks system failures – Most human errors are symptoms of flawed processes, poor training, or weak controls.
- It prevents improvement – If you blame the individual, you miss the chance to improve the system.
Instead of asking, “Who made the error?”
Ask, “Why did the system allow the error to occur?”
Human Error: Often the Result of Poor System Design
Consider these common root causes behind human errors in GMP environments:
1. Inadequate Training or Competency
- Was the employee trained on the task?
- Were they assessed for understanding?
- Was training documented and effective?
2. Ambiguous or Complex Procedures
- Are SOPs too long, unclear, or difficult to follow?
- Is the formatting consistent?
- Is there visual guidance or decision support?
3. Environmental Distractions or Stress
- Was the operator under pressure to meet output targets?
- Were they multitasking or interrupted?
- Were work conditions noisy, cluttered, or unsafe ?
4. Lack of Checks and Balances
- Were critical steps verified?
- Was double-checking or automation used where possible?
- Is the process prone to manual errors?
5. Cultural Issues
- Are employees afraid to report errors?
- Is there a blame culture?
- Are continuous improvement and learning encouraged?
Moving Beyond Blame: A Risk-Based, Preventive Approach
To reduce human errors in GMP, companies must shift from a person-centred view to a system-centred one. This involves:
- Conducting thorough root cause investigations using tools like 5 Whys, Fishbone (Ishikawa) diagrams, or FMEA
- Redesigning processes to be error-proof (e.g., poka-yoke, colour coding, checklists)
- Improving training and competency frameworks
- Simplifying SOPs and using visual aids
- Promoting a quality culture that prioritises accuracy over speed
When Human Error Is the Root Cause
Yes, sometimes the root cause really is a one-off human lapse. In these cases:
- Document exact circumstances (fatigue, distraction, etc.)
- Confirm adequate training and clear procedures were in place
- Implement corrective actions (e.g., re-training, supervision)
- Consider adding preventive controls (e.g., automation or redundancy)
In GMP environments, human error is rarely the true root cause. More often, it’s a starting point for deeper investigation into systemic weaknesses. Regulators expect companies to take a proactive, preventive, and process-oriented approach to quality.
So next time you see “human error” in a deviation report, ask:
Is this a root cause or an excuse?
How Q&V Can Help
At Q&V, we help pharma and biotech companies implement robust deviation management systems, conduct root cause investigations, and design human error prevention strategies. Whether you’re preparing for an audit or building a culture of quality, our expert team is here to support you.