A principle and procedures for ranking a group of persons according to the functional state of their body in accordance with the value of the indicators of the activity of regulatory mechanisms are proposed. Indicators are calculated by five-minute electrocardiogram records. Contradictory situations are not excluded, when the condition is better by some indicators and worse by others. The goal of the work is to improve the hardware and software of diagnostic systems in terms of decision support software for comparative assessments of functional states for a group of individuals. The work was performed using the traditional approach to assess the functional states of the human body using the same set of indicators as in the assessment of the integral complex indicator AIRS. For the implementation of the procedure, regulatory data on the subrange boundaries of the contingent indicator values of the tested persons and the results of the evaluation of their indicators are required. The ranking will be done automatically. Developments of the principle and procedures for ranking the group of persons disclosed in the work are presented in this amount for the first time. The ranking of a specific group of individuals is given as a test check of the proposed software procedures.