Risk Mitigation Strategy Based on FMEA for Integrated Power Management System: A Case Study Applying Fuzzy Service FMEA (다종 전력 통합 관리시스템의 FMEA 기반 위험 저감 방안: Fuzzy Service FMEA 적용 사례)

Myeong-Gwan Han (한명관); Seok-Goo Lee (이석구); Dong-Hyun Kim (김동현)

doi:10.20465/KIOTS.2025.11.5.181

Risk Mitigation Strategy Based on FMEA for Integrated Power Management System: A Case Study Applying Fuzzy Service FMEA

Journal of Internet of Things and Convergence
Abbr : JKIOTS
2025, 11(5), pp.181~187
DOI : 10.20465/KIOTS.2025.11.5.181
Publisher : The Korea Internet of Things Society
Research Area : Engineering > Computer Science > Internet Information Processing
Received : September 19, 2025
Accepted : October 17, 2025
Published : October 31, 2025

Myeong-Gwan Han ¹, Seok-Goo Lee ², Dong-Hyun Kim ³

¹한국조선해양기자재연구원
²에스엔시스
³국립부경대학교

Accredited

ABSTRACT

This paper presents a fuzzy rule-based FMEA applied to the power management system (PMS) of hybrid vessels to complement the qualitative limitations of conventional FMEA and to reflect the operational context of complex systems. The proposed method extends conventional subjective evaluation into a quantitative model based on fuzzy logic, thereby ensuring the consistency and objectivity of risk assessment. Occurrence, severity, and detectability are modeled as triangular fuzzy numbers(TFNs) on a five-level linguistic scale, and a fuzzy risk-priority number(RPN) is derived through product t-norm inference and centroid defuzzification(Δx = 0.1, output scale [0–100]). In a case study on output short-circuit, input overvoltage, and overheat protection, the fuzzy RPN corrected over- and underestimation versus the traditional RPN(e.g., 84→73.5, 72→66.2, 56 → 58.3). The results demonstrate improved diagnostic accuracy, reproducibility, and general applicability of the proposed approach, which is practical for test/inspection resource allocation, protection-logic retuning, and extensible to weighted RPN(WRPN), FTA coupling, and digital-twin-based online risk management.

KEYWORDS

Fuzzy FMEA, Power Management System (PMS), Hybrid Vessel, Risk Priority Number (RPN), Digital Twin, Safety

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* References for papers published after 2025 are currently being built.

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Journal of Internet of Things and Convergence 2025 KCI Impact Factor : 0.75

Risk Mitigation Strategy Based on FMEA for Integrated Power Management System: A Case Study Applying Fuzzy Service FMEA

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* References for papers published after 2025 are currently being built.

Journal of Internet of Things and Convergence 2025 KCI Impact Factor : 0.75

Risk Mitigation Strategy Based on FMEA for Integrated Power Management System: A Case Study Applying Fuzzy Service FMEA

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