" ... it is common/best practice to implement dependent web services and back end functionality before writing a web UI, right?" Well, there's UI-first develop

" ... it is common/best practice to implement dependent web services and back end functionality before writing a web UI, right?" Well, there's UI-first development. http://www.sapdesignguild.org/editions/edition8/ui_first.asp http://www.sapdesignguild.org/editions/edition8/ui_first.asp "{Developers] usually create the user interface only after the underlying technical entities are available. Since the user interface sits on top of functions in the program logic and a database, why not create them early in the process and see what kind of interface will evolve? This approach inevitably leads to a user interface that mirrors database structures and to a user interaction that is determined by the flow of the program logic. It should be influenced; instead, by the way users act and think."