The Build-Measure-Learn cycle is a feedback loop that is said to be one of the core components of the Lean Startup methodology. Its goal is to turn uncertainties, assumptions and risks into knowledge or “sure things” that will eventually guide organizations and business towards progress. Through this process, the key unknowns can actually be transformed into knowledge that the startup can use in its product development – and business operations, as a whole. This whole process can also be called an experiment.
Book: User Story Mapping by Jeff Patton and John King