Leveraging the legacy of a series of successful workshops (,,
) that brought together
people from Human-Computer Interaction (HCI) and Software Engineering (SE) communities to discuss
the interplay between software evaluation and development, the proposed I-UxSED 2012 is further
inspired by more recent insights into the issues pertaining to traditional usability (e.g. 
as well as the emerging User Experience (UX) (e.g. , 
The shift of emphasis in the field of HCI from usability engineering to a much richer scope
of user experience where users' emotions, affects, motivations, and values are given as much,
if not more, attention than ease of use, ease of learning and basic subjective satisfaction 
Among others, four challenges engendered by the new focus of UX are particularly relevant to
software development: (i) definition of UX; (ii) modelling of UX; (iii) selection of UX evaluation
methods; (iv) interplay between UX evaluation feedback and software development.
The concept of UX is commonly understood as subjective, context-dependent and dynamic 
A "formal" definition of UX issued by ISO 9241-210: 2010 - A person's perceptions and responses
that result from the use and/or anticipated use of a product, system or service - is ambiguous
and needs to be refined.
In contrast to usability, UX metrics are yet to be defined. The task is related to ongoing
debates on the measurability of experiential qualities 
. Both usability and UX measures
should enable professionals to benchmark competitive design artefacts and to select right
design options. The intriguing question is whether the respective measures have different
persuasive power and impact on (re)design and development.
Modelling users' experiences is especially important for understanding, predicting and reasoning
about processes of UX with consequences for software design. However, a number of issues pertaining
to UX modelling remain to be resolved 
Recently, research efforts have been undertaken to collect, consolidate and categorize UX evaluation
methods (e.g. 
). It is envisaged that taxonomies of UX qualities, which can facilitate the
selection of UX methods and measures, will come to fruition from these ongoing endeavours.
The first three issues have significant impacts on their fourth one - the theme of I-UxSED 2012 -
is only explored to a limited extent.