A computer approach for simulating a feedback system and its adaptive versions is presented. It is conceived with recursion formulas to describe the interconnected elements of the system. The potential of the approach is explored by applying it to an existing practical system. It is then enhanced by a performance analysis leading to a provision of a unified system evaluation technique. The approach permitted experimentation with different combination of system parameters, system inputs and system configuration. The efficiency of the approach suggets its suitability for a rational engineering design of systems.