Tech_Interview_Prep

Dashboard Design Principles

Building a dashboard that actually gets used and drives decisions, not one that just looks comprehensive.

What it is

Good dashboard design prioritizes the specific decision a viewer needs to make, over comprehensively displaying every metric that's available — a dashboard trying to show everything usually ends up effectively showing nothing clearly.

Key points

  • Know the audience and the decision: a dashboard for an executive needs a different level of aggregation and framing than one for an analyst doing root-cause investigation — the same underlying data, presented very differently.
  • Progressive disclosure: lead with the key metric and trend, let the viewer drill into detail if needed — rather than surfacing every possible cut of the data at once.
  • Visual hierarchy: the most important number should be the most visually prominent — size, position, and color should reflect importance, not just be applied decoratively.
  • A dashboard that's opened once and never checked again has failed regardless of how polished it looks — usage is the real measure of whether a dashboard is actually working.