Quality assurance is the system that ensures a product is made correctly every time. In pharmaceuticals, it covers everything from the design of the manufacturing process to the training of the people who run it. QA is proactive. It builds quality into the process rather than testing for it at the end. The goal is to prevent defects, not to catch them after they happen.

QA is different from quality control, though the two work together. QC tests samples of the final product to confirm they meet specifications. QA looks at the whole system: documentation, procedures, training, equipment, and supplier management. A robust QA system includes standard operating procedures, batch records, deviation management, change control, and internal audits. It also includes validation, which is the documented evidence that a process consistently produces a product meeting predetermined specifications. Regulators inspect QA systems during GMP inspections. A weak QA system can lead to recalls, warning letters, or import bans.

Core elements of QA:

• Standard operating procedures. Written instructions for every process.
• Documentation. Batch records, logs, and training files.
• Validation. Evidence that processes and equipment work as intended.
• Deviation management. Investigating and correcting problems.
• Audits. Internal and external checks on compliance.

QA is a culture as much as a system. It depends on people at every level following procedures and reporting problems.