Abstract: A specifically designed buffer store (35) is used in a method according to the invention for simulation of a technical system, from which auxiliary result values (H1, H2) of an auxiliary function (25) are read specifically when current values of calling parameters (s1, s2, s?1, s?2) of the auxiliary function (25) match correspondingly stored values of the calling parameters. A simulator (60) according to the invention has a correspondingly specifically designed buffer store (35). The method according to the invention and the simulator according to the invention are in this case based on the discovery that, in many cases, a technical system can be described by a state description which comprises an auxiliary function two or more times and, in particular, with the auxiliary function depending only on some of the state variables of the technical system.