Understanding the Impact of Variability Through Modeling

Ever since W. Edwards Deming, Joseph Juran, Philip Crosby, and other quality gurus began their crusades over half a century ago, companies have spent considerable energy tracking down and eliminating sources of variability that disrupt their operations and contribute to quality problems. The quality movements—Six Sigma, Total Quality Management, Taguchi Methods, ISO 9000, and others—all hold as a central tenet that a key to quality improvement is the continuous reduction, mitigation, and elimination of factors that contribute to process and system variability. These quality movements are closely aligned with lean manufacturing principles, which focus on the systematic elimination ...

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