This study aims to investigate how Lean Six Sigma (LSS) can be applied to improve the operational performance of ISO/IEC 17025 accredited laboratories while ensuring compliance with regulatory requirements. It examines how LSS, supported by Action Research (AR), can be adapted to address inefficiencies in laboratory workflows.
An AR methodology was adopted in an industrial laboratory, enabling a participatory and iterative improvement process. The study followed the DMAIC framework, supported by tools such as Value Stream Mapping, cause-and-effect analysis, 5 Whys, 5S, Standard Work and visual management. Data were collected from 2023 to 2024 to establish a baseline and assess performance improvements.
The implementation of LSS led to significant improvements, including a 41% increase in productivity, a 19% reduction in testing lead time and a 70% decrease in response time for communicating deadlines, while maintaining a 98% on-time delivery rate. Improvements were driven by enhanced process visibility, reduced variability, better planning and the introduction of a digital scheduling tool.
The study is based on a single case study, limiting generalisability. Future research should explore multiple contexts and long-term sustainability and the integration of LSS with emerging digital technologies.
The findings provide a structured framework for laboratory managers to improve efficiency, responsiveness and compliance through LSS and digital planning tools.
This study contributes to the limited empirical research on the integration of LSS in ISO/IEC 17025 environments, demonstrating how the DMAIC framework can be operationalised in regulated laboratory contexts through a structured and participatory approach.
