A business process can be characterized by multiple perspectives (intentional, organizational, operational, functional, interactional, informational, etc.). Business process modeling must allow different stakeholders to analyze and represent process models according to these different perspectives. This representation is traditionally built using classical data acquisition methods to-gether with a process representation language such as BPMN or UML. These techniques and specialized languages can easily become hard, complex and time consuming. In this paper we propose ISEA, a participative end-user mod-eling approach that allows the stakeholders in a business process to collaborate together in a simple way to communicate the business process requirements in an accurate and understandable manner. Our approach covers the organizational perspective of business processes, exploits the information compiled during the simulation of the processes in the organizational perspective and touches lightly an interactional perspective allowing users to create customized interface sketches to test the user interface navigability and the coherence within the pro-cesses. Thus, ISEA can be seen as a participative end-user modeling approach for business process requirements.