We apply the Information Systems Success Model to the domain of public administration in Germany to formulate a substantiated alternative approach as well as a matching scoring model to overcome the prevailing political prioritization of public service processes. The proposed score is evaluated in four diff erent case settings, three administrative levels with the help of three diff erent methods. The scoring models can be used consistently throughout the body of investigation. We discuss the results of the evaluation in the context of usability and

usefulness and describe commonalities and variances. Guidelines, potential adaptions and future research suggestions frame the paper.