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This paper reports a study in which business process modelling was regarded as a useful tool for requirements engineering. We have used business process models as a starting point to derive alternative sets of requirements for a process-oriented system. These alternative sets capture different decisions regarding the intended ldquolevel of automationrdquo for the various activities in a business process. The approach is demonstrated in a case study which consists of the development of a real system to manage processes in a human resources (HR) department of a large organization. We use a requirements specification that was previously obtained through what we characterize as a ldquoconventionalrdquo requirements engineering technique and we compare it with the requirements specifications derived from the business process model. We discuss the impact of the use of business process models in the …