The iStar workshop series is dedicated to the discussion of concepts, methods, techniques, tools, and applications associated with i* and related approaches. Following successful workshops in Trento, Italy (2001), London, England (2005), Recife, Brazil (2008), Hammamet, Tunisia (2010), Trento, Italy (2011), Valencia, Spain (2013), and Thessaloniki, Greece (2014), this year (2015) the workshop was held in Ottawa, Canada. As with previous editions, the workshopb's objective was to provide a unique opportunity for exchanging ideas and recent progress, comparing notes, and forging new collaborations. This year, the workshop was in conjunction with the 23rd International Requirements Engineering Conference (RE'15), benefiting from the common themes and interests shared by the two events.

0 Jaelson Castro, Universidade Federal de Pernambuco, Brazil Sotirios Liaskos, York University , Canada

As with past editions, we have tried to keep the format informal so as to maximize interaction. Aiming at an inclusive and discussion-oriented workshop, the main criterion for paper acceptance in iStar'15 was relevance and potential for raising discussion. A 36member program committee, consisting of scholars and practitioners with expertise and interest in the field, were involved in reviewing a total of 26 complete paper submissions. Each of the papers was reviewed by three arms-length program committee members. Of the submitted papers, 19 were accepted for presentation in the workshop and revised versions of the papers are included in the proceedings that follow. In the event, 13 out of the 19 accepted papers were given 30 minutes for presentation and discussion. The remaining 6 were deemed by the reviewers to be reporting work at its earlier stage and were given a short presentation slot of 15 minutes.