Department of Chemistry, Laboratory of Water, Study and Analysis of the Environment, Host Unit: Micropollutants and Environmental Analysis, Faculty of Sciences, Abdelmalek Essaâdi University, Tetouan, Morocco
This communication talks about the methodological problem of ornamental the results of visual inspections for the assessment of the anomaly level of the object of study. This question is studied on the case of sanitation networks but the results can be transferred to other areas. The anomaly level can be defined by three arguments: specialist rules, comparison of a summary note with threshold values and analysis of a longitudinal profile. The calibration of the threshold values requires comparison of the results of assignment of anomaly levels with the statements of the specialists serving as reference. We propose a calibration index that takes into account the costs associated with the different allocation errors.