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GlossaryMethodology

Statistical Process Control (SPC)

The use of statistical methods to monitor and control a process. Uses control charts to distinguish between common cause and special cause variation, enabling proactive quality management.

Key Benchmarks

Cpk target: >1.33
Control limits: ±3 sigma
Out-of-control rate: <1%

Related Terms

Overall Equipment Effectiveness (OEE)

A measure of manufacturing productivity calculated as Availability x Performance x Quality. An OEE of 85% or higher is considered world-class. It identifies the percentage of planned production time that is truly productive.

Six Sigma

A data-driven methodology for eliminating defects and reducing process variation. Achieving Six Sigma means only 3.4 defects per million opportunities (DPMO). Uses statistical tools and the DMAIC framework.

See Statistical Process Control (SPC) in action

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