Securing National Accreditation Board for Testing and Calibration Laboratories (NABL) certification requires establishing a comprehensive quality management system that strictly adheres to international standards such as ISO/IEC 17025 for testing and calibration laboratories or ISO 15189 for medical laboratories. The applicant laboratory must systematically document all standard operating procedures, implement rigorous internal audit protocols, participate successfully in inter-laboratory proficiency testing programs, and formally submit an application along with detailed technical documentation to the accreditation body. Following an exhaustive desk review of the submitted manuals and a rigorous on-site evaluation conducted by expert lead assessors who inspect equipment calibration, staff competency, and facility environmental controls, the laboratory addresses any identified non-conformances before the accreditation council grants formal NABL certification.