Formalization and research of model of linear optimization of the state of difficult object on the example of subsystem of cardiovascular disease risk. Criterion of optimization: the risk class(An optimization criterion was formed for the risk of cardiovascular disease, where the control of the system was applied using variables representing systolic blood pressure and maximum heart rate during the stress test. The reaction of the optimal result to the variation of the accidental influence restrictions was investigated. It was developed an application for more convenient work with the model.)