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Cp and Pp: Two Capability Indices That Should Not Be Confused Capability indices are used to quantify a process's ability to produce parts that meet specifications. Among...

A nonconforming batch that passes through the receiving area undetected costs nothing at the time. It ends up costing more later: machine downtime, parts that need to be sorted out...

Before beginning mass production, every quality team must answer a fundamental question: Is my process physically capable of producing within specifications? It’s not...

X̄-R Control Chart: What Are the Red Lines For? On an X̄-R control chart, operators see dots and blue lines scrolling by, and—often...

ISO 2859-1 is the reference standard for attribute sampling in incoming inspection. For more than twenty-five years, quality departments have been working with the 1999 edition. It...

If you've ever opened a capability report in Ellistat looking for the Cpk, you didn't find it. This isn't an oversight. It's a deliberate, well-founded choice...

SPC (Statistical Process Control) and incoming inspection are often lumped together under the same category: «inspection.» This is a mistake. These two approaches do not share the same objective,...

One software company has its roots in manufacturing, the other in quality control. TOPSOLID and Ellistat operate in the same field—the mechanical engineering industry—but from two different perspectives. Their partnership has...

In an industrial environment that is increasingly data-driven, the quality of decisions depends directly on the reliability of the available measurements. A robust APC (Automated Process Control) system...

In most precision machinery workshops, two different trades work on the same part without speaking quite the same language. The metrologist thinks in terms of tolerances, in...

For decades, the same thing has been repeated in industrial statistics courses: in experimental design, everything was developed based on Fisher's work (1926, then...

Choosing statistical software for an industrial site involves much more than just a licensing budget. An ill-suited tool slows down analyses, discourages field teams, and ultimately ends up being...