Usability is about one thing and that is the quality of interaction between people and products. Its really that simple. However, the process involved to ensure this quality is less straightforward. Also, to clarify, usability is human factors. They are one and the same.
The task of increasing the quality of interactions between people and products can be driven by regulation. For example, making a product safe to use. However, the commercial drivers of making the product more efficient and satisfying to use are just as significant.
Its important to know that usability isnt something that is only applied to medical products, nor is it something that is only applied to complex devices. Something as simple as a tin opener has progressed dramatically since the mid-1900s with regard to usability, as has the folding of a baby stroller and the user experience of many software applications. Its all around us.
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