The dissertation describes the technical analysis of the pipe material of gray cast iron, which is developed on the basis of historical documents and standards. The technical analysis is a methodology for determining the technical state and theoretical residual life of the pipe section made of cast iron, which is processed into a software application Kozel 1.0. The proposed methodology operates on the basis of multi-criteria decision making. For input the data methodologies are designed to monitor the operators of water supply networks. The output of the methodology is to determine the category of the technical condition of the pipe section and time stamp, minimum and maximum residual lifetime analysis pipeline segment. Outputs of the methodology are compared with the outputs of medium-term plans of Ostrava and Brno.