Queuing theory and its application in Large Scale Scrum. Queueing theory offers insight into why traditional development is unnecessarily slow—and what to do about it. In large-scale development, it’s common that ‘one’ feature (before splitting) is staggeringly gigantic. In such domains, it is particularly helpful to see that large batches and long queues actually exist and the problems they cause. It’s hard to fix a problem you don’t know you have. And queueing theory points to some ways to improve. This thinking tool is especially relevant for the large scale because big variable batches of work—so common in the traditional model—have a nonlinear impact on cycle time—they can really mess things up,