For the creation of software products, the idea of iterative and incremental development and design is widely accepted and embedded in various methodologies. However, earlier activities within software projects are often the cause for the projects termination. Such activities are often described as the product discovery phase. Therefore, this study develops PDISC, a method for software product discovery. Following a design science research approach, a systematic literature review extracts design requirements and method fragments from literature. The method fragments describe early activities and are documented using process deliverable diagrams. Collectively, such method fragments form a method database that is used to develop PDISC. PDISC helps practitioners to conduct early activities in a systematic way in order to create a product vision.