In this paper an iterative, step-based sustainable food system approach has been developed that help navigate complexity and is flexible in its required resources, thus enbaling a fast overview or a deep dive as determined by a project’s or organisation’s objectives. The goal of the approach is that together, the four components can help guide practitioners and decision-makers to describe, diagnose, and develop more coherent, effective, and context-appropriate interventions in food systems to improve their sustainability. »