As the first step of risk management, risk identification is inevitable to understand the degree of work safety. However, the safety requirements can be divided in necessary factors and additional factors. Thus, we propose a safety requirements assessment model using Kano model derived from Herzberg’s two-factor theory, classifying safety requirements into ideal elements and must-be elements. The Kano model is usually applied to evaluate customer satisfaction divided into three major requirements in the fields of product development and marketing: attractive, must-be, and one-dimensional requirements. Among them, attractive requirement and must-be requirement are matched with ideal element and must-be element for safety requirement classification, respectively. The ideal element is defined as preventive safety elements to make systems more safe and the must-be element is referred to as fatal elements to be essentially eliminated in systems. Also, coefficients of safety measurement and safety prevention are developed to classify different class of safety requirements. The positioning map is finally visualized in terms of both coefficients to compare the different features. Consequently, the proposed model enables safety managers to make a decision between safety measurement and prevention.

1. 서 론
2. Kano 모형
3. Kano 모형 기반 안전지표 개발
    3.1 평가모형개발
    3.2 안전요구사항 지수
    3.3 요구사항 평가 도구
4. 안전요구사항 평가
5. 결론

• 이세정(부경대학교 안전공학과) | Sejung Lee (Department of Safety Engineering, Pukyong National University)
• 장성록(부경대학교 안전공학과) | Seongrok Chang (Department of Safety Engineering, Pukyong National University)
• 서용윤(동국대학교 산업시스템공학과) | Yongyoon Suh (Department of Industrial and Systems Engineering, Dongguk University) Corresponding Author