Journal Published Online: 10 October 2014
Volume 43, Issue 4

Estimating Process Capability Index with Various Sample Types: A Practical Implementation

CODEN: JTEVAB

Abstract

Process precision index Cp has been used widely in the manufacturing industry for measuring process potential and precision. In practice, sample data with various types such as one single random sample, multiple random samples, control chart samples, and samples with gauge measurement errors may be employed to estimate the Cp index for evaluating the process potential capability. If the process is perfectly centered in the specification range, the percentage of process non-conforming (%NC) can be expressed by Cp index. In this paper, a review for estimating and testing of Cp index is presented. Some efficient MATLAB programs and illustrative examples are also provided for each type of sample data.

Author Information

Wu, C.
National Chiao Tung Univ., Hsinchu, TW
Pearn, W.
National Chiao Tung Univ., Hsinchu, TW
Pages: 11
Price: $25.00
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Details
Stock #: JTE20140020
ISSN: 0090-3973
DOI: 10.1520/JTE20140020