Critical Importance of Subject Matter Experts

Absolutely.  I usually call it context understanding.  And that  understanding comes from having subject matter expertise close at hand.   In Information Management.  " .... "Know thy self, know thy enemy" says Sun Tzu in 'The Art of War'. Creating a domain/data model and relying on subject matter experts throughout the development of the ML system will certainly guarantee you a success. And finally, your product, albeit highly specialized, will not be a threat to the domain experts, but rather a natural extension of their abilities. True experts cannot be substituted. ... "