Statistical Analysis and Improvement of Process Capability Indices

LIU Jieping; LUO Zhenbi; CHEN Yuliu

doi:10.13374/j.issn1001-053x.2004.02.023

Volume 26 Issue 2

Aug. 2021

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LIU Jieping, LUO Zhenbi, CHEN Yuliu. Statistical Analysis and Improvement of Process Capability Indices[J]. Chinese Journal of Engineering, 2004, 26(2): 206-210. doi: 10.13374/j.issn1001-053x.2004.02.023

Citation:

LIU Jieping, LUO Zhenbi, CHEN Yuliu. Statistical Analysis and Improvement of Process Capability Indices[J]. Chinese Journal of Engineering, 2004, 26(2): 206-210. doi: 10.13374/j.issn1001-053x.2004.02.023

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Statistical Analysis and Improvement of Process Capability Indices

doi: 10.13374/j.issn1001-053x.2004.02.023

1. Department of Mechanical Engineering, Beijing Jiaotong University, Beijing 100044, China;
2. Department of Industrial Engineering, Tsinghua University, Beijing 100084, China;
3. Department of Automation, Tsinghua University, Beijing 100084, China

Received Date: 2002-09-26
Available Online: 2021-08-16

Abstract

Abstract

To increase product quality and predict the unqualified products, effective control methods must be selected. Considering the disadvantages of process capability indices C_p and C_pk that are hard to help to find the reason of quality problems and direct quality improvement, three new indices C_ps, C_pc, and C_pc available in real time are introduced to control the scatters and errors. Finally the feasibility of these indices is proved by an application.
- quality control,
- statistical analysis,
- random sampling