“…if we design and develop digital products in such a way that the people who use them can easily achieve their goals, they will be satisfied, effec- tive, and happy. They will gladly pay for our products—and recommend that others do the same. Assuming that we can do so in a cost-effective manner, this will translate into business success.”

Cooper, A., Reimann, R., Cronin, D., & Noessel, C. (2014). About face: The essentials of interaction design (4th ed.). John Wiley & Sons, Inc.