Usability is the measure of how well a person can use a product to achieve an intended goal. In a previous post, I talked about how usability testing should be a key part of any iterative design process, preferably being implemented as early as possible to identify design problems. But usability testing is also an important tool to evaluate existing products before you ever sit down at the drawing board to devise a change or new design.
There comes a time in every project when an idea transitions from conceptual to actual. In website and app design that time generally comes during the prototyping process. Prototyping can be done in a range of fidelities, or levels of detail, from low to high. Low-fidelity prototypes can be a great tool for quickly iterating design ideas and starting usability testing early in your design process, but the type of experience they offer is quite removed from a product’s endgame. High-fidelity prototyping is when things start to feel and look real.