IdeaFlow, or "How to Measure the PAIN in Software Development". A book by Janelle Arty Starr. An approach for systematically measuring where and when problems arise in software projects (software pain) and how to go about resolving them. Janelle proposes a data-driven feedback loop to locate the causes of friction and pain in `developer experience'. But she concludes that the challenge is not that we can't find solutions to these problems, it is in finding and correctly identifying the underlying problems in the first place.