Reasonably used methods support us in achieving our goals. Not all methods work equally well in every phase, which is why it is necessary to make regular adjustments and choose the setup for the next steps. It can typically make sense to start with design thinking methods at the beginning in order to later switch to an agile development process and find the market fit via lean startup.
At each stage, we proceed iteratively until we have the results with which to test our hypotheses. Depending on the test result, we either go one step further or we have to go into another iteration.