Pipe Deterioration Prediction (PDP) and Pipe Failure Risk Prediction (PFRP) models were developed in an attempt to predict the deterioration and failure risk in water mains using fuzzy technique and the markov process. These two models were used to determine the priority in repair and replacement, by predicting the deterioration degree, deterioration rate, failure possibility and remaining life in a study sample comprising 32 water mains. From an analysis approach based on conservative risk with a medium policy risk, the remaining life for 30 of the 32 water mains was less than 5 years for 2 mains (7%), 5-10 years for 8 (27%), 10-15 years for 7 (23%), 15-20 years for 5 (17%), 20-25 years for 5 (17%), and 25 years or more for 2 (7%).

• 최태호(K-water연구원) | Taeho Choi (1,2K-water Research Institute, Korea Water Resources Corporation, 125, Yuseong-daero 1689 beong-gil, Yuseong-gu, Daejeon 34045, Republic of Korea)
• 최민아(K-water연구원) | Min-ah Choi (1,2K-water Research Institute, Korea Water Resources Corporation, 125, Yuseong-daero 1689 beong-gil, Yuseong-gu, Daejeon 34045, Republic of Korea)
• 이현동(한국건설기술연구원(KICT), 과학기술연합대학원대학교(UST)) | Hyundong Lee (3Environmental Engineering Research Division, Korea Institute of Construction Technology(KICT) and Department of Construction and Environment Engineering, University of Science and Technology(UST), Goyangdae-ro 289, Ilsanseo-gu, Goyang-si, Gyeonggi-do, 10223, Republic of Korea)
• 구자용(서울시립대학교 환경공학과) | Jayong Koo ((Corresponding author)Department of Environmental Engineering, University of Seoul, Seoulsiripdae-ro 163, Dongdaemun-gu, Seoul, 02504, Republic of Korea) Corresponding author