01 / BusinessWhat really needed solving
The question was not how much was sold, but what remained after costs and financing needs. An accounting hierarchy connects Revenue, COGS, OPEX and EBITDA. Treasury and working-capital indicators complete a picture sales alone cannot provide.
02 / DesignWhy this structure matters
Financial modelling matters as much as visualisation. The Books connection and variance analysis support comparisons within a common structure. Channel and product drill-down helps locate differences; it does not replace financial judgement in interpreting them.