A Sankey Diagram is a visualisation technique that allows to display flows. Several entities (nodes) are represented by rectangles or text. Their links are represented with arrow or arcs that have a width proportional to the importance of the flow.
Limit the position and number of nodes, to improve readability.
Filter out weak connections by allowing for group / having filters in facts.
Provide for Multi select option for nodes – so Business Users Questions are answered.
Adjust data granularity to ensure better response times when displaying and using the Sankey charts
Use Pleasant colors for nodes and connectors so the presentation is pleasing.
Use popups to describe the values in flows – to explain the meaning better.