This document discusses different models for managing innovation processes, including stage-gate models, project portfolios, and agile systems. It begins by explaining stage-gate models, which provide a structured process for moving ideas through to launch, including stages to develop ideas and gates for review and decision-making. Radical innovations may require more formal controls through this process. The Renault Kwid is presented as an example of disruptive innovation through its very low price point, though it did not feature new technologies. Development phases need feedback loops to maintain alignment with the original innovative vision to avoid potential "valleys of death".