The purpose of the warranty data analysis can be classified into two categories. Two goals is a failure cause analysis and life prediction analysis. In this paper first, we applied multivariate analysis method that can be estimated in consideration of various factors on the failure cause warranty data. In particular, we apply the Tree model and Cox model. The advantage of the Tree is easy to interpret this result as compared to other models. In addition Cox model can quantitatively express the risk.
Second, this paper proposed a multivariate life prediction model (AFT) considering a variety of factors. By applying the actual warranty data confirmed the usability.

Abstract
 1. 서 론
 2. 본 론
  2.1 보증데이터란
  2.2 보증데이터 분석방법 연구 동향
  2.3 보증데이터 원인분석 방법
  2.4 기존 분석방법과 차이점
 3. 분석사례
  3.1 Tree 및 Cox 모형을 이용한
  3.2 AFT(Accelerated Failure Time) 분석결과
 4. 결론
 5. References

• 김종걸(성균관대학교 산업공학과) | Jong-Gurl Kim Corresponding Author
• 성기우(성균관대학교 산업공학과) | Ki-Woo Sung