Sales documents, item costs and the gross profit recorded against each one reach Tableau from SAP Business One, so a margin chart shows the figure the ledger holds rather than a fresh one.
SAP Business One works out gross profit when a document is posted, using the item cost at that moment, and stores the result on the document. Tableau will happily recalculate margin from price and a current cost instead, and the two answers differ by however much cost has moved since. So finance quotes one margin, the dashboard shows another, and the meeting becomes a discussion about which number is right rather than what to do about it. Connecting SAP Business One and Tableau carries the posted figure across, so the chart and the ledger stop disagreeing.

Gross profit as SAP Business One posted it travels to Tableau rather than being recalculated there, so the dashboard and the ledger answer the same question the same way.
Finance stops being asked to reconcile a chart, because the figure in Tableau came from the document rather than from a formula somebody wrote against price and a current cost.
A document posted last year keeps the cost it was posted with, so a margin trend reflects what actually happened instead of being restated every time item cost moves.
Data is staged and reused between refreshes, so Tableau reads from one prepared set and SAP Business One is not queried again by every workbook that somebody happens to open.
Alumio reads posted sales documents from SAP Business One with their lines, costs and gross profit values and delivers them to Tableau, so a margin chart is built from the ledger rather than recomputed from price.
Documents are read with their posting dates and kept as posted, so a Tableau trend across periods shows margin as it was recorded at the time rather than as it would look if today's item cost were applied backwards.
Business partner detail arrives with the documents, so Tableau can show profitability per customer and per document type without anybody exporting SAP Business One and joining two files by hand at the end of each month.
Alumio sits between sales channels and fulfillment systems as a governed integration backbone. Orders are routed, transformed, and validated, while status updates return to every channel.
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What the dashboard cannot explain on its own is the useful test, and for margin it is why a price moved. A competitor price-monitoring service is the addition most businesses reach for, because SAP Business One records what you charged and nothing about what the market was doing that week. Alumio holds both connections, so the comparison arrives in Tableau shaped like the sales data rather than as a separate report nobody opens.
Where the refresh boundary sits is the first decision: what is read as posted and what is left to Tableau to calculate. Alumio reads the SAP Business One documents you nominate with their lines, costs and posted gross profit on the schedule you set, and delivers them prepared. Documents still open are excluded, so a chart is not built from figures the ledger has not accepted yet.
No, and the version this replaces is a report writer maintaining a query and a spreadsheet beside Tableau. Which SAP Business One documents are in scope, which fields travel and how often is configuration in Alumio, and the calculation that used to live in a workbook stops being duplicated per analyst. For a standard ERP feeding a reporting tool, configuration covers it without custom logic.
From the document, if it is sent from SAP Business One as posted. SAP Business One computes gross profit at posting using the item cost at that moment and stores it on the document, so a figure Tableau derives from price and a current cost is a different measure with the same name. Sending the posted value across means the chart reports what the ledger holds and nobody has to reconcile two margins.
A refresh that half completed is worse than one that failed, because the chart still draws. Each delivery is watched as it runs and what it read from SAP Business One is recorded, so a partial set reaching Tableau is alerted on at once, named with its reason and retried where configured. Per-route alerts cover no activity, so no gap is quietly charted.
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