In this joint project with our customer, a multinational engineering and technology company, we conceptualized and tested the idea regarding consumer preferences as the fundamental basis that informs engineering approaches to create new and customer-oriented products. To showcase the value of conveying engineering insights to marketing, we present the transfer process and its sales-related results for the Smart Home Assistance (SHA) product segment. Over the years, our customer has made various efforts to understand consumer preferences for SHA products, e.g., smart home personal assistants, in-vehicle assistance, intelligent smart home locks, smart refrigerator and nutritional assistance. They jointly substantiate that consumers prioritize controllable, well-connected, reliable and enjoyable SHA. We conducted a randomized field experiment with hundreds of prospective buyers and tested whether the strategic advertising of the four characteristics identified in the design engineering process can increase real purchase rates for an existing SHA product. When participants were exposed to advertisements highlighting the controllability, connectedness, reliability or enjoyment characteristics of the SHA, purchase rates were up to three times higher than when participants were not exposed to such advertising.