Many enterprises are on the path towards the automation of their business processes. To be fully efficient this kind of automation needs to rely on rich models of business processes. This paper presents an ontology, named K-CRIO, that allows the description of a specific kind of business processes: those that are dedicated to the design of a product. This ontology draws from organizational theories. The contribution of this paper is twofold. On the one hand, it described the key concepts and relationships of the k-CRIO ontology and on the other hand it illustrates this ontology by taking the example of the Scrum development process.