Fail Rate Complexity Method를 활용한 정비도 할당 방안

서, 양우¹^{, *} ; 이, 원¹ ; 김, 용국¹ ; 최, 세진²

1LIG넥스원 미사일시스템 IPS연구소 수석연구원
2LIG넥스원 미사일시스템 IPS연구소 선임연구원

A Study on Maintainability Allocation Using the Fail Rate Complexity Method

Yangwoo Seo¹^{, *} ; Won Lee¹ ; Youngkuk Kim¹ ; Sejin Choi²

1Chief research engineer, Missile Systems Integrated Product Support R&D Lab, LIG Nex1
2Research engineer, Missile Systems Integrated Product Support R&D Lab, LIG Nex1

Correspondence to: ^*Yangwoo Seo 20, Daewangpangyo-ro 851 beon-gil, Sujeong-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Tel: +82-31-326-9255 Fax: +82-31-326-9001 E-mail: yangwoo.seo2@lignex1.com

초록

본 논문은 fail rate complexity method를 활용한 정비도 할당 방안을 제시하였다. K system의 정비도(MTTR) 목표값 4시간 기준으로 하위 장치 8개에 대해 7단계를 거쳐서 정비도를 할당하였다. 또한, 시스템 정비도 목표값 조정 가능여부에 따른 하위 장치의 정비도 할당에 대한 대안분석을 수행하였다. 시스템 정비도 목표값 조정이 가능하면, 시스템 정비도 목표값을 감소/증가 시키면서 해당 품목의 정비도 값을 조정할 수 있다. 또한, 시스템 정비도 목표값 조정이 불가능하면, 해당 품목의 수량을 감소/증가시키면서 정비도 값을 조정할 수 있다. 본 논문의 결과를 활용하면 정비도 목표값 조정 가능여부에 따른 해당 품목의 최적의 정비도 할당을 수행할 수 있다.

Abstract

This paper presents a method for allocating maintainability using the fail rate complexity. Based on the target value of the K System's maintainability (MTTR) for four hours, the maintainability was allocated to eight sub-equipments through seven steps. In addition, an alternative analysis was undertaken on the allocation of the sub-equipments’ maintainability according to whether its target value could be adjusted. If it is possible to adjust this target value, the value of the relevant item can be adjusted while reducing/increasing the target value of the system maintainability. Moreover, if it is impossible to adjust the target value of the system’s maintainability, this value can be adjusted by reducing/increasing the quantity of the item. By utilizing the results of this study, the optimal maintainability allocation of the relevant item can be implemented according to whether the maintainability target value can be adjusted.

Keywords:

Mean Time to Repair, Design for Maintainability, Fail Rate Complexity Method, Mean Time Between Failures

키워드:

평균수리시간, 정비성 설계, 고장률 복잡성 방법, 고장 간 평균시간

References

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MIL HDBK 470A, Designing and Developing Maintainable Products and Systems, Department of Defense, 1997, Chapter 4: Elements of a Maintainability Program, p. 47.
RAM Guide Book, Weapons System Reliability, Availability, Maintainability Work Manual, Defense Acquisition Program Administration, 2018, p. 27.
Benjamin S. Blanchard, Logistics Engineering and Management (6th ed.), Pearson Prentice Hall, 2004, p. 285.
MIL HDBK 338B, Electrical Reliability Design Handbook, Section 6: Reliability Specification, Allocation, Modeling and Prediction, Department of Defense, 1998, pp. 7-19.
MIL STD 470B, Maintainability Program for Systems and Equipment, Department of Defense, 1989, Chapter 4: Elements of a Maintainability Program, pp. 11-42.