Editorial, special issue RE 2018.

The I IEEE International Conference on Requirements Engineering i (RE) is the premier conference on all aspects of requirements-related research. The industry papers at RE'18 were renamed Industry Innovation papers to stress the nature and importance of these contributions to the RE community. The four research papers with the best review scores and explicit support of the PC, together with the best industry innovation paper, were invited to submit an extended version to this special issue of REJ. [Extracted from the article]