Explanation is one of the central goals of scientific research and abduction is a type of inference in which explanation plays a key role. Thus far, most philosophers will agree. When we consider more specific claims, however, many questions are still open to debate. What are the different forms of explanation and of abduction? How do these interrelate? To what extent are they open for formal explication? What about the relation to other notions, such as confirmation, induction, IBE, causality, belief revision, …? The aim of this interdisciplinary workshop is to further our understanding of these notions and of their interrelation.