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A Study on the Quality Assessment Using QFD & FMEA

QFD와 FMEA를 이용한 품질평가에 관한 연구

  • 박창규 (전주비전대학교 조선해양과)
  • Received : 2017.10.20
  • Accepted : 2017.11.03
  • Published : 2017.11.30

Abstract

Recently, the quality of a product or system has becoming increasingly important as it means customer satisfaction. The function, which is recognized as a nature of this quality, means how it functions well so it is the closest to the customer satisfaction. On the other hand, it is becoming more important as safety is closely related to destruction or human injury from accidents for engineers who handle large-scaled structures, such as ships. This study analyzed the function using quality function development (QFD) and considering the function and safety, which are being recognized as important in the structure. In addition, the safety and the quality analysis method based on the customers' needs was analyzed using failure mode and influence analysis (FMEA). In addition, the supplementary materials that are important in terms of the aspect of safety and function for the quality enhancement of a hatchway system were determined by applying a bulk carrier and hatchway. As a result, there are commonly understood items in important supplementary materials and parts, which are determined individually in terms of function and safety, because they can enhance both the function and safety simultaneously. This study shows that designers can improve the quality of products and systems by enhancing these supplementary materials and parts with greater interest.

최근 제품이나 시스템의 품질은 고객만족을 의미하기에 점점 더 중요하게 인식되고 있다. 이러한 품질의 한 특성으로 인식되는 성능은 주어진 기능을 얼마나 잘 수행하는가를 의미하는 것으로 고객만족에 가장 접근하는 특성이다. 그러나 선박과 같은 대형 구조물을 다루는 공학자에게 있어서 안전성은 사고 시에 발생하는 파괴나 인명피해 등과 밀접하게 관계되어 있기 때문에 그 중요성이 더욱 크게 인식되고 있다. 본 연구에서는구조물에서 중요하게 인식되는 성능과 안전성을 고려하여, 품질기능전개(QFD)를 이용하여 성능을 분석하고 파괴모드(Failure Mode) 및 영향 분석(FMEA)을 이용하여 안전성을 분석함으로써 고객의 요구사항에 기반을 둔 품질 분석방법을 제시하였다. 또한 이를 살물선(Bulk Carrier)의 화물창구(Hatchway)에 적용하여 화물창구 시스템의 품질향상을 위한 성능과 안전성 측면에서 중요한 부재를 파악하였고, 성능과 안전성 측면에서 개별적으로 파악된 중요 부재 및 부품들 중에는 공통적으로 파악된 것들이 존재하는데, 이들은 성능과 안전성을 동시에 향상시킬 수 있는 부재 및 부품들이므로 설계자는 설계 시 이러한 부재나 부품에 더 많은 관심을 갖고 개선함으로써 제품 및 시스템의 품질을 향상시킬 수 있는 결과를 나타내었다.

Keywords

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