New technology using a procedure with a modified steepest descent gradient to build the block diagram of the system reliability. There are a comparative analysis of the data obtained by other methods. The were investigation of the effectiveness of methods with the use of the steepest descent procedures and dynamic programming in the designing of the block diagram of system reliability. Identified additional stages to the method of steepest descent improving quality reliability block diagrams (RBD), and in the most cases lead to an optimum RBD. The application of the method and procedure of adaptation of the gradient provides essential lowering informational complexity of the algorithm for finding the optimal solutions. Key words: the steepest descent, modified gradient, dynamic programming, design of the block diagram of reliability, optimization, redundancy.
