Wireframes are crucial when synthesising design requirements for a new product. They can be used to practically demonstrate the suggested changes for a product and when testing a few aspects of the product, or the entire product. Wireframes can be in the form of paper wireframes or HTML wireframes. I prefer to use HTML wireframes, using tools like Axure or Pidoco, since these are clickable, shareable and can be changed on the fly.
For example, for Umati, which is a machine learning tool we are designign to monitor hate speech online, I used wireframes to communicate the UX requirements to the software development team. The wireframes can be viewed here - Umati .
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