Lucy Suchman had an understanding of people and human society. She used this knowledge to improve the understanding of how design works for people. Lucy had a video recorded of people trying to use a copier machine and struggling greatly. She was one of the early people that would observe how users interact with working prototypes. By understanding the behavior of the user, we can better design with the user in mind. If the user finds something unclear, then that’s a sign that we need to make the design more intuitive. It is extremely important to test prototypes on someone to see if it makes sense or if there are any issues. If we don’t test prototypes, then we could waste time creating a flawed design or a design that doesn’t fulfill its goal well. We use Suchman’s concept of testing prototypes today, and it’s vital to the design process.