I want to find research that tells me how a dashboard should work in order to deliver insight to a user. Dashboards are important artefacts for business users,

I want to find research that tells me how a dashboard should work in order to deliver insight to a user. Dashboards are important artefacts for business users, but their design seems to be about aethestics rather than function; and whereas individual visualisations are researched to understand how they deliver information (for example the uselessness of pi-charts) the overall design of dashboards doesn't seem to have any understood structure or known methods of adding value.