Keep logic in the semantic model, not the dashboard
Explain why business logic belongs in the semantic model or metric layer rather than in workbook calculations.
Dashboards should reveal logic, not hide it. Why workbook logic causes drift A workbook calculation is convenient because it is close at hand. It is also dangerous because the same logic usually gets copied, tweaked, and forgotten in multiple places. Once that happens, no one knows whether a number changed because the business changed or because one dashboard author edited a calc. What belongs upstream Core business definitions belong in the semantic model and metric layer. The semantic model defines entities, joinable dimensions, and time behavior. The metric layer defines calculations such as revenue, margin, conversion, or active users. Those…
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