Focus on the core domain – "people get distracted by technology, and we want to bring that attention back to the business domain," said Evans. According to him, even if that whole business domain is too much, DDD requires us to focus on the core, the critical, most valuable part.

Explore models in a creative collaboration with domain practitioners and software practitioners – "we have to collaborate, not just quiz [business experts] for requirements."

Speak a ubiquitous language in an explicitly bounded context.