The BI stack behind channel visibility that paid for itself in a month: the true-margin model that joins every channel's revenue to its hidden costs, and the period-alignment trap that makes first versions oscillate. Public excerpt; the full teardown lives in the Builder library.
This is the architecture behind a build we cite often: a brand flying blind on its wholesale channel, a BI stack that made margin visible in real time — and, in the client's own words, visibility that paid for the engagement in the first month. The payback speed isn't magic. The answers already existed in data the brand owned; the stack just joined it.
Layer 1 — Every channel's revenue, unified. DTC platform, marketplace exports, distributor EDI, retail POS — one warehouse, one product-identity mapping (the same SKU-aliasing table the supply chain stack needs; build it once, spend it everywhere).
Layer 2 — The cost side, hunted down. This is the layer that makes it "true" margin, and the layer no channel's native dashboard will ever give you: marketplace fees and fulfillment charges, freight, retailer chargebacks and promotional allowances, returns. Each cost arrives in a different document, on a different lag, at a different grain. Getting each one into the warehouse, attributed to channel and where possible to SKU, is most of the build's actual labor.
Layer 3 — The allocation model. Some costs attach cleanly to a SKU-sale; others (a freight invoice, a warehouse's monthly bill) arrive as lumps that must be allocated by explicit, documented rules. The rules matter less than their consistency and visibility — a margin number nobody can trace to its allocation logic is a margin number that loses its first argument with the CFO. Every figure drills through to its components.
Layer 4 — Views that answer the one question. Channel P&L, SKU-by-channel margin, trended — built to answer "which channel actually makes us money?" with a number, live, instead of a quarterly spreadsheet. The SKU-by-channel grain is where decisions sharpen: the same product profitably beloved in DTC and quietly underwater on a marketplace after fees.
The channels reported on different clocks. Sales data arrived daily; marketplace fee statements arrived on their own cycle; chargebacks landed weeks after the sales they related to. The first margin dashboard joined whatever had arrived — so recent periods always looked great (revenue in, costs not yet) and then deteriorated as costs caught up. A margin number that oscillates teaches the team to distrust it in exactly one week. The fix: explicit period-completeness modeling — every period carries a completeness state, provisional margins are labeled as provisional, and "settled" is a defined event per channel, not a hope.
Returns reopened closed months. Marketplace returns arrived weeks late and were netted into the current period, quietly punishing this month for last month's sales. Returns now attribute back to their originating sale's period, with restatement handled explicitly — small accounting discipline, large trust dividend.
The full teardown — the cost-source inventory by channel type, the allocation rule patterns, the period-completeness model, and the drill-through structure — lives in the Builder library.
Implementation detail, checklists, and the parts we'd rather not have public — for members.
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