The ideal place for a design sprint is at the beginning of a project, after the initial research. It’s often the best way to move from the exploration phase to prototyping the first ideas.
To visually understand the place of a design sprint in an innovation project, we advise you to take a look at the Design Sprint Quarter.
In an already launched product, the design sprint can be used to imagine a new feature or an innovative business model. It’s often the best (and least expensive) way to de-risk an idea.