Quality refers to doing things right the first time according to established requirements and standards. It involves accuracy, reliability, and timeliness of laboratory test results. Quality control monitors performance against standards, quality assurance refers to all operational aspects, and quality management involves determining policy objectives and implementing quality planning, control, and improvement. Laboratory accreditation in India is administered by the National Accreditation Board for Testing and Calibration Laboratories (NABL) based on the ISO 15189 standard, which specifies requirements for quality and competence in medical laboratories. The quality management system involves establishing essential elements like organization, customer focus, facilities management, and processes to assure quality.