Processes for creating digital projects and services have grown increasingly complex as technologies and attendant user needs have grown increasingly complex. User experience design (UX) can thus be defined as “the judicious application of certain user-centered design practices, a highly contextual design mentality, and use of certain methods and techniques that are applied through process management to produce cohesive, predictable, and desirable effects in a specific person, or persona (archetype comprised of target audience habits and characteristics). All so that the [effects] produced meet the user’s own goals and measures of success and enjoyment, as well as the objectives of the providing organization.” (via)
Here’s a great infographic on everything that goes on in UX:
In addition, UX design processes can be thought of in two main ways: as a series of recursive stages, and as several overlapping skill sets.