Glossary AllABCDEFGHIJKLMNOPQRSTUVWXYZ T T-Shirt Sizing An estimating technique for sizing project components using categories, e.g. XL, L, M, S, XS... Learn More → Task A unit of work that needs to be completed individually or in collaboration with others. Learn More → Technical Debt The typically unpredictable overhead of maintaining the product, often caused by less than ideal design... Learn More → Test-Driven Development Test-first software development practice in which test cases are defined and created first, and subsequently... Learn More → Three Amigos Three amigos refers to the primary perspectives to examine an increment of work before, during,... Learn More → Throughput The number of work items finished per unit of time. Note the measurement of throughput... Learn More → Timebox A fixed, maximum time that can be spent on an event or activity. It encourages... Learn More →