A text that brings together our learnings and reflections from the past ten years addressing public challenges through innovation, with a focus on implementation and impact. The flexibility required to develop a public innovation process reinforces the idea that associated methodologies are not recipes but rather a set of guiding principles. Public innovation requires the right timing, forms, and tools to be developed. It is not always agile or brief, and it often does not have a clear end point; rather, it is a continuous process of adjustments, adaptation, and improvement of a product or service in response to ever-changing realities.