A working piece of software is not always needed Prototyping is still important because it allows users and designers to interact with the products before developing a fully live version
Is the process of of determining the usability and acceptability of the product or design that is measured in a variety of usability and user experience dataCorrect
Concrete design: Considers the detail of the product including, colors, sounds, and images to use menu design, and icon design
Specific usability and user experience goals should be identified, clearly documented, and agreed upon at the beginning of the project