What it is
Everview renders data using four chart types, each suited to a different question: donut charts for proportional breakdowns at a glance, bar charts for distribution across date bands, line charts for a metric's trend over time, and streamgraphs for how effort is distributed across categories over time.
How to read it
Reach for a donut chart for a quick proportional split (for example, work item types in a sprint). Reach for a bar chart when comparing distributions across date bands. Line charts are best for watching a single metric — like velocity — trend over several iterations. Streamgraphs show how multiple categories' effort shifts relative to each other over time, which a stacked bar chart can't show as clearly. Color coding and legends are consistent across all four types within a given dashboard.
The breakdown dashboard stacks iteration-indexed line charts next to its donut: Say/Do Ratio, Team Velocity, Spillover, and Work In Progress. Each carries the latest value and a trend badge comparing recent iterations; the badge is green when the metric moved in its good direction — up for Say/Do, down for Spillover, which only plots closed sprints. The donut's summary line also carries the selected period's spillover figure. When the selection is too short for every chart, the stack trims from the bottom up, keeping Say/Do and Velocity longest.
What to do about it
Don't read a single chart in isolation — Everview's charts are designed to be combined. Pair a Sankey ribbon's metrics (allocated capacity, expected progress, estimated effort, buffer) with a trend line or breakdown dashboard for a fuller picture before drawing conclusions, and cross-reference against Understanding Objectives and Metrics when a chart's trend touches an OKR you're tracking.