New process capability index using Taguchi loss functions
Classic process capability indices such as Ca, Cp and Cpk are well-known process capability indices, which are using widely. Since, process capability indices predict the capability of a process, they must have a significant relation with rate of rejects and losses. Studies showed that mostly proces...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Asian Network for Scientific Information
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/15803/ http://psasir.upm.edu.my/id/eprint/15803/1/New%20process%20capability%20index%20using%20Taguchi%20loss%20functions.pdf |
| Summary: | Classic process capability indices such as Ca, Cp and Cpk are well-known process capability indices, which are using widely. Since, process capability indices predict the capability of a process, they must have a significant relation with rate of rejects and losses. Studies showed that mostly process capability indices do not have a significant relation with rate of rejects or losses. Therefore, the loss-based indices are more appropriate and suitable indices to predict the capability of a process. In order to define a new loss-based process capability index, Taguchi loss functions were employed and this study proposed a novel process capability index called Taguchi-based Process Capability Index (TPCI). The methodology of this process capability index is based on standard rate of rejects for a capable process compared to other cases. Therefore, this study develops a new process capability index, which is Taguchi loss function-based and sensitive to losses. This new process capability index can provide a realistic and applicable metric to evaluate a process. |
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