Abstract: The system reliability can be increased by different means, in which the structural redundancy is the most effective method for improving the system reliability to any desired level. Although there are many algorithms[1] for solving the redundancy problems, but very few of them are quite successful in various respects. In this paper we provide an universal heuristic method by choosing the largest sum of the purtial derivatives of the system reliability with respect to all the current constrained resources separately in a certain stage as the selection factor. This method is good for series parallel and complex system with either linear or non-linear constraiats and objective functions.