„Design rationales provide information that explains why a conceptional design/prototype/final product is designed how it is being designed.“ [1]

By using them, we easily make a decision together by having sufficient background knowledge, while at the same time ensuring high quality driven by the needs of customer groups.

The benefits of Design Rationales, according to LU#4 slides, could be listed as:
» organize a potentially large design space
» present arguments for design trade-offs
» enforce design discipline
» support communication throughout development life cycle [1]

Source: [1] LU#04, 04-3_HCI_Defining_Design_Rationales.pdf, Slide 2] visited 01.07.2021