A method is for checking a characteristic variable of an application procedure of an X-ray based medical imaging application, each patient model, of a plurality of patient models stored in a database, is characterized by at least one model parameter. In addition, a subset of the plurality of patient models is selected based upon the at least one model parameter assigned to a patient model or based upon the X-ray based medical imaging application. In addition, a number of simulated application procedures of the X-ray based imaging application are performed based upon the selected subset of patient models, at least one patient model being input into each performed simulated application procedure. Furthermore, a value of the characteristic variable is ascertained for each performed simulated application procedure. In addition, the value of the characteristic variable ascertained is output or is automatically evaluated based upon a specified target for the characteristic variable.
