The subdomains are like foundational building blocks: take one away and the whole structure may fall down. That said, we can leverage the inherent properties of the different types of subdomains to choose implementation strategies to implement each type of subdomain in the most efficient manner. Core subdomains have to be implemented in-house. They cannot be bought or adopted; that would undermine the notion of competitive advantage, as the company’s competitors would be able to do the same.
