A business intelligence dashboard, in Stephen Few's definition, is "a visual display of the most important information needed to achieve one or more objectives; consolidated and arranged on a single screen so the information can be monitored at a glance" (Few, 2004). That sentence contains the whole discipline: most important, single screen, at a glance, tied to an objective. A dashboard that fails any of those tests is something else, a report, a portal, a data dump, wearing a dashboard's clothes.
Companies keep buying BI tools that most of their staff never open. The strongest public adoption figure comes from a BARC and Eckerson Group survey of 214 data and analytics leaders: across those organizations, an average of about 25% of employees actively used the BI tools their company had bought, and that number had barely moved in the seven years BARC had tracked it (2022). The hard part was never building the dashboard; it was getting people to open it twice.
Below: which of the three dashboard types you need, why so many go unused, what a build costs once you count labor, and where AI helps. We build and run intelligence systems for a living, so we also say where a dashboard is the wrong tool.