A persistent challenge for scholars is the reconciliation of the retrospective clarities of entrepreneurial opportunities with their prospective opaqueness. While recent conceptual work acknowledges that entrepreneurial opportunities start out as mere venture ideas and are developed through a process of learning and social interaction, we still lack a substantive understanding of how the process unfolds from initial idea to fully shaped opportunity. In the context of recent observations of the sequence of activities constituting the start-up process as rather unstructured, a higher level of abstraction is needed to capture the process and its generative mechanisms.