Computer-implemented reservation method and system. The method utilized for controlling the execution of a decision process by a computer backend machine of a computer network upon receipt of a computation inquiry includes associating to the computer backend machine a configuration file containing at least a decision rule that drives the decision process and that is computed at least from a current value of a statistical indicator and a target value of the statistical indicator; periodically obtaining an updated value of the statistical indicator; upon detection that the updated value is differing from the target value, dynamically updating the configuration file which further comprises re-computing the decision rule using the updated value as new current value, and storing in real-time the re-computed decision rule in the configuration file.