Chapter 8. Functional Specifications

The UX functional specifications document is a communications tool: It is written in a formal way by which the interaction designer prescribes to the developers the desired behavior of the user interface. If you need to deliver such a document, your takeaways from this chapter should be the following:

  • Seek the development team's input and approval on the format and scope of the specifications, as early in the project as possible
  • Estimate early, and correctly, the effort involved in creating and generating the specifications
  • Start planning and testing the specifications output when you start your Axure file and continue testing and tweaking the output throughout the project

The tendency to postpone dealing with ...

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