From first designs of the interaction concept key elements and features are implemented prototypically. This way a basis develops on which features can be tested regarding the feel and usability. With this method different technologies are tested enabling a good understanding of their usability and feasibility.
Experience prototyping examines the usability of the favored technology and compares them to alternatives. Based on the experience prototyping, the decision on the essential features and the final technologies to be used is reached.