Organizations are subject to continuous change due to internal and external influences. Business processes are an important concept for the effective support of organizations to master this challenge. Within business process management, modeling is an important tool for the analysis, design, implementation, optimization and execution of processes. As a methodological approach, several phases have been identified within business process management, which are arranged along a cyclic development procedure. The work has its focus on eliciting domain expert knowledge contributing their process know how for process analysis. It overcomes current limitations of role-based survey methods by non-disruptive representation support. The developed method and tool enables domain experts to collect their process knowledge in self-controlled way. In this way, during actual operational activities work models can be designed and implemented in case subject-oriented modeling is applied. The applicability of the method and the adequacy of tool support are evaluated in an organizational development use case.