Sigmapraktijken

Sigmapraktijken refers to the practices and methodologies derived from Six Sigma, a data-driven approach to quality and process improvement. Originating in the manufacturing sector at Motorola in the 1980s and later popularized by General Electric, Six Sigma aims to reduce process variation and defects to improve performance, often described as achieving no more than 3.4 defects per million opportunities, assuming a typical shift in the process mean.

The core framework centers on two project paths: DMAIC for improving existing processes (Define, Measure, Analyze, Improve, Control) and DMADV for creating new processes (Define, Measure, Analyze, Design, Verify). Implementations typically involve defined roles such as Champions, Black Belts, and Green Belts, and rely on a range of statistical and mapping tools. Common tools include SIPOC diagrams, value-stream mapping, failure modes and effects analysis (FMEA), design of experiments (DOE), hypothesis testing, and control charts to monitor process stability.

Sigmapraktijken have been applied across manufacturing, services, healthcare, and IT, with goals to reduce cycle times, costs, defects, and rework while increasing customer satisfaction. Success depends on strong executive sponsorship, rigorous project selection, and the integration of Six Sigma with broader improvement strategies such as Lean. Critics point to potential drawbacks, including implementation cost, organizational rigidity, and uneven ROI if projects are misaligned with strategic priorities or lack sustained support. Overall, sigmapraktijken describe a structured, evidence-based approach to process excellence.