공리적 설계와 강건설계에 기초한 비연성화 공정능력지수의 적용방안

Abstract

This paper presents the Decoupled Process Capability index(DPCI) using the integrated system of axiom design and robust design. The DPCI exploits the synergetic effects of design techniques between the two stage optimization concept from robust design and the functional independence mapping of Functional Requirements(FRs) and Design Parameters(DPs) from axiom design. The two stage optimization technique is a similar concept as the information axiom that can be reduced by the design complexity, which is caused by unpredicted noise factor by improving the precision and accuracy of system range. The functional independence mapping is also known to reduce the design complexity of axiom design matrix by avoiding the design dependency. The DPCI proposed in this paper is compared with other design complexity measures such as Design Information Content(DIC), Design Success Probability(DSP), Design Loss Function(DLF), and Coupled Process Capability Index(CPCI) under the various design conditions. The numerical example is presented to support that fact that the DPCI can always be outformed against the other design complexity measures regardless of the design type and system distribution, the dispersion shape and bias location of system distribution, as well as the distance of mean from the design range.