Live Sankey flow diagrams in PI Vision, driven by PI tags or AF attributes. Ribbon thickness follows the data, so the diagram breathes with the process instead of sitting there as a static drawing. Click any node to highlight its complete upstream and downstream path and dim everything else, which is how you trace where a loss actually comes from. Every pass-through node is continuously mass-balance checked: when inflow and outflow diverge beyond your tolerance, the node flags itself with the error. And you do not have to draw it - browse your Asset Framework database in the Format panel, pick a root element, and Build creates every node and link from the AF model.