My design principle is based on the Framework for Innovation or new version of double diamond, which helps me to fully understand what the problem is and how I can solve this. I always believe that design is a great help when it comes to innovating. That is exactly what we see in the market: businesses that need to innovate turn to design for help, for a model, with the additional of key metrics (engagement and leadership).
I believe design changes things, responds to problems, and understands how that problem affects people using products.