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A Brief Note on Process Capability
Weiss, Elliott N. Technical Note OM-1439 / Published April 19, 2011
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Product Overview

Process capability, as revolutionized by Motorola, can be defined as the extent to which a process's natural variation falls within specifications. This note is a succinct introduction to the process capability ratio, which compares set specifications against the three standard deviations on either side of the process mean--six in total, referred to as Six Sigma. This introduction assumes a normal distribution of observations and a process that is performing predictably over time.

  • Overview

    Process capability, as revolutionized by Motorola, can be defined as the extent to which a process's natural variation falls within specifications. This note is a succinct introduction to the process capability ratio, which compares set specifications against the three standard deviations on either side of the process mean--six in total, referred to as Six Sigma. This introduction assumes a normal distribution of observations and a process that is performing predictably over time.

  • Learning Objectives