Aerospace Instrument-Making Annotation << Back Simulation Model for Assessing the Performance of an Information and Measurement System Emelyanov I.P., Martynov A.M., Makarenkov V.V., Lutsko I.S. Currently, the evaluation of information-measuring systems (IMS) effectiveness is predominantly based on a posteriori analysis of statistical data on the overall system performance. This approach fails to account for emerging challenges, the most critical of which is the increasing saturation of the surveillance zone with objects of observation (OO). For IMS of various classes, the fundamental complication of the operational environment within their area of responsibility, primarily driven by the growing number of OOs, constitutes a systemic problem. The tactical and technical characteristics of each IMS include the parameter of throughput capacity, which is determined at the design stage based on predicted operational conditions and requirements for guaranteed surveillance. Conducted analysis indicates that modern IMS, depending on their deployment location and the spatial orientation of their surveillance zone, are already operating at the limit of their declared throughput capacity or will encounter this problem in the foreseeable future. Given the relevance of this issue, the development of methods for simulation modeling of IMS operation under extreme throughput load conditions is of significant scientific and practical interest. The purpose of such modeling is to assess the actual probability of generating information about OOs and to identify factors negatively affecting this indicator. Keywords: effectiveness of functioning, probability of successful maintenance, evaluation algorithm, identification, object of observation, information and measurement system, correlation gate. DOI: 10.25791/aviakosmos.1.2026.1533 Pp. 45-55.