  Shift scheduling impacts healthcare workers' well-being because it sets the
frame for their social life and recreational activities. Since it is complex
and time-consuming, it has become a target for automation. However, existing
systems mostly focus on improving efficiency. The workers' needs and their
active participation do not play a pronounced role. Contrasting this trend, we
designed a social practice-based, worker-centered, and well-being-oriented
self-scheduling system which gives healthcare workers more control during shift
planning. In a following nine month appropriation study, we found that workers
who were cautious about their social standing in the group or who had a more
spontaneous personal lifestyle used our system less often than others.
Moreover, we revealed several conflict prevention practices and suggest to
shift the focus away from a competitive shift distribution paradigm towards
supporting these pro-social practices. We conclude with guidelines to support
individual planning practices, self-leadership, and for dealing with conflicts.
