Starts off with the Discover/Research phase followed by the Define/Synthesis phase.
In most cases, by the end of the phase, you'll have a list of unstructured research findings.
Synthesizing the results help find the alignment between your purpose of the challenge & your research findings.
As a result, you'll come up with a (modified) final brief that holistically tackles the design challenge, and is supported by the HMW-statements/scenarios.
Starts off with the Develop/Ideation phase followed by the Deliver/Implementation phase.
Having the design challenge and actual purpose finalized, ideation begins.
As a result, you'll end up with a reasonable amount of ideas (1-3) to prototype and test with, and can potentially be the best answer or solution to your design challenge.
In order to eventually execute the final idea into a real product that would potentially resolve the design challenge, its best to follow an agile approach consisting of the following three steps:
If the product went through enough testing and iteration, and eventually feels "right", and encompasses the caliber of an Minimum Viable Valuable Validable Product it's probably good to go "out".