From Wikipedia..."Software development is the process of computer programming, documenting, testing, and bug fixing involved in creating and maintaining applications and frameworks resulting in a software product. Software development is a process of writing and maintaining the source code, but in a broader sense it includes all that is involved between the conception of the desired software through to the final manifestation of the software, sometimes in a planned and structured process.[1] Therefore, software development may include research, new development, prototyping, modification, reuse, re-engineering, maintenance, or any other activities that result in software products"

From Ross...As an experienced application designer I focus on the user experience before structuring and styling the application. Commonly I will set up mark up pages and links to model process flow and the user experience prior to adding business logic and database interaction.