there is described a method for determining the processing sequence of components of a function plan for a sequentially operating automation system . each component is allocated a component code in a reversible unambiguous manner and , while the components have a signal input and output connection , these should be applicable to a number of various function plans and thus minimize the reaction time of an automation system to process signals . the above is achieved , whereby the signal path in the function plan commences at an initial component in a recursive procedure in the forward direction and returns in the backward direction . a given set of propagation rules for the forward direction and for the backward direction are defined , the components reached in the course of a forward propagation are allocated to a sequence list , the list elements of which include the component codes and during each run through the recursive loop the sequence list obtained on the previous run is updated by means of the current sequence list .