Abstract
The heterogeneity of the deterioration rate of infrastructure is attributable to various factors. In this study, the authors propose a mixed Markov deterioration hazard model considering the heterogeneity of deterioration rate due to technical problems in construction and the heterogeneity due to management problems. In detail, an ideal deterioration process is expressed with a Markov deterioration hazard model excluding the effects of the deterioration caused by the management environment. In addition, the gap between the current deterioration process and the deterioration process that would become the best practice under certain technical conditions is expressed by using management efficiency parameters. Then, the effects of construction and management on deterioration rate are evaluated quantitatively, through the efficiency evaluation based on probabilistic frontier analysis. Lastly, the authors discuss the usefulness of the method proposed in this study, by carrying out the case study of the method to inspection data on sewer culverts.
