TDi -Test Driven ideas is an approach and definition which combines Plan-Do-Study-Act and Build Measure Learn practices to test and challenge ideas. It’s not a revolutionary new way of working, it serves as a reminder to put quality at the front of the line to test ideas and assumptions.
Writing user stories in Agile can be very difficult. Although it appears simple, it can take time to perfect at technique which works with the team. This post provides some useful insights into ways in which you can improve your story writing technique taking some examples from XP, INVEST and BDD using Gherkin.
Barcelona Scrum Gathering 2012. Using TDD and BDD to help your team understand what to build high quality working software.