A Design Sprint is a step by step process for solving big problems and validating ideas in 4 days.
The default product development cycle doesn't check how customers will react until after you launch. The Design Sprint validates new ideas fast before you invest time and money to build them.
Alignment is the big unexpected benefit. Through intentionally designed exercises, multiple stakeholders are included in the idea development process, creating personal investment in the solution, leading to less mis-alignments and misunderstandings.
The core principles of the Design Sprint are: