Bob Williams’ workbook, System Diagrams: A Practical Guide, serves as a comprehensive resource for understanding how visual tools can clarify and manage complex systems. The text differentiates between constructed diagrams, which are built from scratch to map unique situations, and generic diagrams like the Viable System Model or Cynefin, which apply established frameworks to specific problems. Williams emphasizes that these illustrations are essential for making sense of intricate relationships and communicating those insights effectively within group settings. Accompanying materials from a European Evaluation Society conference further highlight the practical application of these systemic approaches for professional evaluators navigating uncertainty. By moving beyond linear descriptions, these methods allow practitioners to visualize boundaries, influence, and causality in a single, cohesive view. Ultimately, the sources advocate for participatory diagramming as a way to challenge biases and improve organizational decision-making.