Abstract: A method for process validation includes receiving from a human user a validation rule. The rule specifies a pattern occurring in a process running on a computerized system, an expected outcome of the pattern, a success action to perform when the expected outcome is realized, and a failure action to perform when the expected outcome is not realized. Upon receiving events corresponding to inputs and outputs of the process running on the computerized system, the validation rule is applied to the events so as to engender one or more of the success and failure actions. A validity of the process is assessed responsively to the one or more of the success and failure actions.