Six Sigma
A data-driven methodology for eliminating defects and reducing process variation using statistical analysis and the DMAIC framework (Define, Measure, Analyze, Improve, Control). Six Sigma aims for processes that produce no more than 3.4 defects per million opportunities, representing near-perfect quality.
RELATED TERMS
Statistical Process Control
A method of quality control that uses statistical techniques to monitor and control manufacturing processes. SPC employs control charts to detect variations from normal operating conditions, enabling operators to identify and correct problems before they result in defective products.
Continuous Improvement
An ongoing effort to incrementally improve products, processes, and services over time through small, sustainable changes. Continuous improvement is a core principle of lean manufacturing and quality management, engaging all employees in identifying and implementing improvements.
Quality Management System
A formalized system that documents processes, procedures, and responsibilities for achieving quality objectives and meeting regulatory requirements. QMS provides a framework for continuous improvement, ensures consistent product quality, and helps organizations achieve certifications like ISO 9001.
Lean Manufacturing
A systematic approach to manufacturing derived from the Toyota Production System that focuses on eliminating waste while delivering value to customers. Lean identifies seven types of waste (overproduction, waiting, transport, overprocessing, inventory, motion, and defects) and uses tools like value stream mapping, 5S, and kanban to continuously improve processes.