Fitness for the intended use of analytical equipment and systems

Importance of the Topic

The reliability and accuracy of analytical results depend critically on the fitness for intended use of laboratory equipment and systems. Ensuring that instruments perform as expected under real operating conditions prevents errors in data, supports regulatory compliance, and sustains confidence in decision making across industries such as pharmaceuticals, environmental testing, and food safety.

Objectives and Overview of the Study

This document, prepared by the Eurachem Analytical Equipment and Systems Qualification Working Group, aims to clarify the processes and requirements for qualifying analytical instruments and systems. It introduces the concept of fitness for intended use, discusses the limitations of calibration alone, and outlines a lifecycle approach—from user specifications through commissioning to decommissioning.

Methodology and Instrumentation

The proposed approach integrates several stages:

• Definition of User Requirement Specifications (URS) to establish operational ranges and data integrity needs.
• Qualification phases to verify that equipment meets performance criteria under specified conditions.
• Ongoing quality control and assurance measures to monitor instrument stability over time.

Key analytical principles are illustrated by figures that show: the relationship between principle, method, and procedure; the pyramid of quality highlighting equipment and method validation; and the equipment lifecycle from procurement to end of life.

Main Results and Discussion

The study emphasizes that calibration—defined as relating instrument output to measurement standards—does not guarantee fitness for purpose, since it assumes stable influencing quantities. Fluctuations in temperature, flow rates, or signal intensity are addressed through robustness testing during method validation and through equipment qualification to confirm performance under real operational variations. The pyramid of quality framework classifies four levels: equipment qualification, method validation, short-term quality control, and long-term inter-laboratory assurance.

Benefits and Practical Applications

Implementing a lifecycle qualification process ensures:

• Consistent instrument performance when methods are transferred or when long measurement sequences are required.
• Traceable data integrity with metadata management aligned with ALCOA+ principles.
• Enhanced confidence in analytical outcomes, facilitating regulatory acceptance and reducing rework or repeated testing.

Future Trends and Opportunities

Advances in digitalization and data analytics will drive remote monitoring and predictive maintenance of analytical systems. The increasing integration of artificial intelligence for drift detection and automated qualification procedures will further streamline fitness-for-use assessments. Standardization of electronic records and cloud-based platforms will support long-term data accessibility beyond instrument end-of-life.

Conclusion

A comprehensive qualification strategy that goes beyond calibration and incorporates user requirements, method validation, and continuous quality assurance is essential to prove fitness for intended use. Adoption of this lifecycle approach fosters reliable data generation, regulatory compliance, and sustainable lab operations.

Instrumentation Used

The guidance applies to any analytical equipment or system involving physical or chemical measurement principles, including spectrophotometers, chromatography systems, and mass spectrometers. Specific instrument classes should be qualified according to defined performance parameters in their URS.

Reference

• Georg Schwedt. The Essential Guide to Analytical Chemistry. Wiley-VCH, 1997.
• ISO/IEC 17025:2017. General Requirements for the Competence of Testing and Calibration Laboratories.
• JCGM 200:2012. International Vocabulary of Metrology (VIM), 3rd edition.
• ISO 9001:2015. Quality Management Systems – Requirements.
• ISO 10012:2003. Measurement Management Systems – Requirements for Measurement Processes and Equipment.
• ISO 17034:2016. General Requirements for the Competence of Reference Material Producers.
• ISO 17043:2023. Conformity Assessment – Requirements for Proficiency Testing Providers.