Quality Assurance needs to be done by Designers not just Software Engineers

One of the most important times for a design review is at the end of a development sprint. A design review evaluates whether or not the developed product is in line with the original creative vision and user experience. In other words, it’s a review of the developed project which helps to verify all graphic and technical components display and function properly.

As the design gets passed from design teams to product owners and development teams, they each make changes due to temporal or business issues, which can mean the final product doesn't correspond with the design team’s vision.