We're usually wary of covering diagrammatic techniques, but Wardley mapping is an interesting approach to start conversations around the evolution of an organization's software estate. At their simplest, they're used to visualize the value chains that exist within an organization, starting with customers' needs and progressively plotting the different capabilities and systems used to deliver on those needs along with the evolution of those capabilities and systems. The value of this technique is the process of collaborating to create the maps rather than the artefact itself. We recommend getting the right people in the room to produce them, and then treat them as living, evolving things rather than a complete artefact.