Mass Customization aims at exploiting heterogeneous markets by creating high-variety product offerings that enable customers to find products that meet their individual needs. However, implementing such a business model requires companies to acquire the strategic capability of solution space a firm’s ability to identify the drivers of product variety in a product domain and conceptualize a respective high-variety product offering. This study investigates this phenomenon by developing a theoretical framework for solution space development and deriving a catalog of managerial activities, methods and tools that can be applied in this context.