A method is proposed for controlling technical operations and processes. The method involves running a complex control program in real-time conditions on a microcomputer (11) in a control system (10). The complex control program is divided into tasks (A-D), to each of which is allocated a priority and an activation event. At any given time, the activated task (A-D) with the highest priority is selected for running. A task (A-D) already running can be interrupted if a subsequent request is made to run a higher-priority task (A-D); the lower-priority task (A-D) resumes from the point at which it was interrupted once the higher-priority program (A-D) has been completed. The proposed process is distinguished by the fact that the tasks (A-D) can be sub-divided into a number of subsidiary tasks (A1-D3) which are intended to be run sequentially, and by the fact that within configurable, associated and non-overlapping priority ranges, tasks may interrupt lower-priority tasks only between two consecutive subsidiary tasks or at interruption points explicitly inserted by the user. The higher-priority task (A-D) which is requested at a later time is not launched until the subsidiary task (A2), during which the request to run the higher-priority task (B) was made, is completed.