To create a successful design, it must be designed from the viewpoint of the user and considering human-centred design. Factors in HCD such as the affordance determining if the user can understand how the object can be used, even more vital is the signifier communicating what the user should do. The layout of the mapping should be easily understandable and memorable. To show the object is working feedback is needed, but too much feedback can be distracting. The system image is the user’s past experiences allowing them to figure out how to use an object or understanding what the conceptual model does.