1. Method for the generation of a source code for a computer program for the execution or simulation of a process in which several subjects communicate with one another, comprising the following steps: describing the process in which each subject, the communication between the subjects, and the nature of the activity of the individual subjects are defined, storing the description of the process with the input definitions in a process file, generating automatically a source code for a computer program, in which a separate source code file is generated for each subject and contains commands for the exchange of data with source code files of other subjects, in accordance with the information contained in the process file.