To analyze the deterioration of a real pipeline, we focused on the water distribution system of S city in South Korea. The pipe material, ductile cast iron pipe (DCIP), is regarded as the target for this study. The whole data of DCIPs comprise approximately 26,500 pipelines, 850 km in length, with an average age of around 13 years. Inspection data were obtained from historical records for pipe bursts in S city during the 9-year period 2001–2009. During this period, 1,405 cases of pipe replacement caused by B- and C-burst were recorded. Here, in this study, it is assumed that the replaced pipelines had major damage and its condition state is classified as burst. On the other hand, the historical records of past repair are not considered as burst because a repair is not associated with major damage. Table 1 shows the basic information of the data used in this study.