A Quality Management System (QMS) is a structured set of policies, processes, and procedures designed to ensure consistent product and service quality while meeting regulatory and customer requirements. ISO 9001:2015 is the most widely adopted QMS standard globally, followed by industry-specific standards like ISO 13485 (medical devices) and IATF 16949 (automotive). QMS encompasses documentation, process controls, internal audits, management review, and continuous improvement mechanisms. QMS expertise is non-negotiable in regulated industries (automotive, pharma, medical, food) and increasingly expected in manufacturing and service organizations. Certified QMS professionals command 20–30% salary premiums and open doors to compliance, operations, and management roles. As organizations scale, QMS maturity directly impacts profitability, liability, and customer retention.