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Process capability index - Wikipedia, the free encyclopedia
In process improvement efforts, the process capability index or process capability ratio is a statistical measure of process capability: The ability of a process to produce output within engineeri...
en.wikipedia.org/wiki/Process_capability_index |
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Process capability - Wikipedia, the free encyclopedia
A process is a unique combination of tools, materials, methods, and people engaged in producing a measurable output; for example a manufacturing line for machine parts. All processes have inherent s...
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QM: Process Capability Index as a Supplement to Quality Control Charts ... The process capability index cpk is a measurement of the expected share of nonconforming units in the process. The greater the score is, the smaller this share will be. For characteristic values that follow a normal distribution pattern,
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The process capability index "cp" is a measure of the smallest possible fraction of nonconforming units in the process, which occurs if there is an optimal distribution of characteristic values (centralized production).
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A common Process Capability measure, Cp (often called a Process Capability Index), indicates how well the process distribution fits within its specification limits, and is simply the ratio of the specification width to the variation width.
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A limitation of the use of Cp is that this particular capability index does not consider any bias present within the analytical process. Cpk is a ... We have now derived the mathematical relation between the process capability index, Cpk, and medically important critical errors, SEC and REC, for cases of nonzero bias.
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This publication aids personnel in the use and understanding of the process capability index Cpk, as well as parameters to check in order to reduce process variation. (pub. 2002; 11 pages) ... 06 October 2004; ... Other articles in Guides, Reports & Assessments:
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