The knowledge captured in business process models is essential to identify user requirements of the process aware information system to execute the processes. Frequently, relations between the models and requirements are either not established or only partially available. This results in increased effort, broken traceability, completeness and consistency problems for user requirements. We proposed a unified business process modeling method, UPROM, to analyze and develop models for business processes and user requirements. These models are utilized to automatically generate textual user requirements. We present a multiple case study to evaluate UPROM in two e-government projects initiated for developing workflow management systems. We applied UPROM to identify most of the user requirements and prepare the technical contracts. The multiple case study shows that by applying UPROM, user requirements and business processes can be analyzed in a unified way and textual requirements can be generated automatically. The results proved to be helpful in real life settings.