Also, for how DDD would incorporate both dev and product, product (ostensibly) knows the domain, and needs to communicate it to dev to be able to design things.

Also, for how DDD would incorporate both dev and product, product (ostensibly) knows the domain, and needs to communicate it to dev to be able to design things. A logical follow-up, then, is Event Storming ( https://en.wikipedia.org/wiki/Event_storming https://en.wikipedia.org/wiki/Event_storming ) which came out of DDD, and explicitly lists out dev and domain experts as being involved. Which very much points at my earlier comment of trying to solve by process what should be natural from culture (i.e., are dev and product talking to each other).