According to Wikipedia, design sprint is a time-constrained, five-phase process that uses design-thinking methodology with the aim of reducing the risk when bringing a new product, service or a feature to the market. Designers, including those within GV (formerly Google Ventures) and those at Boston-Based User Experience Agency Fresh Tilled Soil, have developed the concept through independent work.
In many situations design sprint methodology is used for creating a high level prototype (trigger prototype). This minimal prototype would be the trigger for creating a complete functional prototype; it is a rational tool for saying YES.
However, the sprint prototype is also the visual mean for saying NO during the initial stage of idea development. It helps organizations to avoid wasting money with useless solutions. In the context, design sprint should be included in any lean management strategy. So, saying an early NO is extremely valuable decision for the management practice. But it needs a rational framework for it. Today we have design sprint.