Experimental investigation of architectural digital sketching effectivity as a communication tool.

What is effective communication? How can an architect streamline a communication relationship by digitally sketching while saving resources such as time, money, energy during the design process? In the third year of my research, I would like to make an experiment with several cases of architects working with and without digital sketches. Where does it make their workflow and communication with clients more effective? In the second part, I would like to use this grant for a questionnaire survey of the client part of the relationship. How they perceive digital sketches. By intersecting these two sets, I want to obtain criteria: efficiency factors in the relationship between architect and client.