We discuss how an Enterprise Modeling approach, namely C3S3P has been applied in an automotive supplier company. The chapter concentrates on the phases of the C3S3P development process such as Concept Study, Scaffolding, Scoping, and Requirements Modeling. We have also presented the concept of task pattern which has been used for capturing, documenting and sharing best practices concerning business processes in an organization. Within this application context we have analyzed our experiences concerning stakeholder participation and task pattern development. We have also described how we have derived four different categories of requirements from scenario descriptions for the task patterns and from modeling of the task patterns.