Knowra Six Sigma Six Sigma Six Sigma is a data-driven process-improvement methodology that uses statistical measurement and structured problem solving to reduce process variation and defects.
DMAIC : A five-phase improvement cycle: Define, Measure, Analyze, Improve, and Control. This is Six Sigma’s standard framework for improving an existing process.
Process capability : A statistical assessment of how consistently a process can produce output within specified limits. Capability measures connect process variation to customer or engineering specifications.
Motorola : An American electronics and telecommunications company that developed the Six Sigma quality initiative in the 1980s. Motorola developed and formalized the approach to improve manufacturing quality.
Lean manufacturing : A production philosophy focused on maximizing customer value while minimizing waste. Lean targets waste and flow, while Six Sigma centers on variation and defects.
DMADV : A five-phase method—Define, Measure, Analyze, Design, and Verify—for developing processes or products to meet quality goals. It adapts Six Sigma methods to designing rather than repairing a process.
Standard deviation : A measure of how dispersed values are around their mean. Six Sigma quantifies process spread relative to specification limits.
Bill Smith (engineer) : A Motorola engineer commonly credited with developing the Six Sigma methodology. Smith helped shape the defect-focused method at Motorola.
Total quality management : An organization-wide approach to improving quality through participation, customer focus, and continuous improvement. TQM is a broad management philosophy; Six Sigma offers more explicitly structured project methods.
Statistical process control : The use of statistical methods to monitor process behavior and distinguish routine variation from unusual changes. Control charts help determine whether improvements remain stable over time.
Defect (quality engineering) : A product or service outcome that fails to meet a specified requirement. Defect definitions set the counting rules behind project metrics.
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