UCD or not, that's a problem

Truth is constant and can be described, with the description changes over time; it can be expressed, with the expression changes over time.

UCD or not becomes hot and discussed, named and re-named these days. Some claim that UCD means user's direct involve (as traditional definition means and practices), some claim it could only be the design focus. As time goes, we could say they are not very different from designer mind-set view. Like for a search product designer, he may analyze the log, take some data metrics, but there's user behind the data and he tries to understand user's behavior, mind-set and mental model. It centers on the user ( neither data nor tech, data/tech driven are very problematic method, if it's really practiced, instead it should be driven by user studies/researches).

For IxD or UCD, we could make the questions simpler

1. do it need users' direct involve or not?
2. do the design focus on user or not? if not, is there design focus or not? and if yes, what's the center or focuses ?
3. could we give some cases for clarification ( like, iPod, PageRank, etc )
   

By arranging some a list of questions, we could march to the "truth" while putting the name aside for a while.