Book excerpt: Laboratory accreditation has assumed immense importance in recent years because of the need to assure the customer that the laboratory is capable of providing the valid test results reliably. ISO 17025:2017 Lab Quality Management System has become part of the requirement of all the laboratories, small to large. Over the years, ISO 17025:2017 Lab Quality Management System has evolved, as per the laboratory and customer requirements, and has become very important for improving laboratory systems and processes in order to sustain competitive advantages. This book focuses on requirements and key features of ISO 17025:2017 Lab Quality Management System such as risk-based thinking, PDCA approach, process management, and continual improvement. The readers would find it easier to understand the standard requirements and implement these in their work place.