Types of quality management

While specific QMS frameworks vary, common approaches and widely adopted standards include:

• ISO 9001: An internationally recognized standard that sets out the requirements for a quality management system. It focuses on customer satisfaction and continuous improvement.
• Total Quality Management (TQM): A philosophy and management approach focused on continuous improvement of products, services, and processes through the involvement of all employees.
• Six Sigma: A data-driven methodology aimed at reducing defects (variation) in processes to a level of near perfection (3.4 defects per million opportunities). It often uses the DMAIC (Define, Measure, Analyze, Improve, Control) cycle.
• Lean Manufacturing/Lean Management: Focuses on eliminating waste in all forms to create efficiency and value for the customer. While primarily associated with production, its principles apply to processes across an organization.
• Industry-Specific QMS: Many industries have adapted general QMS principles or developed their own standards (e.g., ISO 13485 for Medical Devices, IATF 16949 for Automotive).

These approaches can often be used individually or combined to form a robust QMS.

While there isn't one universally agreed-upon list of exactly "4 types" that covers all QMS methodologies, this phrase often refers to the four main components or pillars of quality management:

• Quality Planning: Defining quality standards, objectives, and processes needed to meet them.
• Quality Assurance (QA): The processes implemented to prevent defects from occurring (proactive).
• Quality Control (QC): Inspecting and testing products/services to identify and correct defects (reactive).
• Quality Improvement: Continuously seeking ways to enhance processes and outcomes.

These four elements are foundational to most QMS frameworks and are essential for achieving consistent high quality.