Every troubled ERP cutover has the same artifact at the scene: a mapping spreadsheet. Row after row of “MATNR maps to item”, reviewed by experts who were never shown the data, signed off in a meeting, and proven wrong at mock load three.
Then a consultant re-edits the workbook, re-runs the load, and re-discovers problems that were already found once. The decisions live in email threads. The knowledge evaporates between iterations.
We ran migrations that way for years. We stopped.
Load-File-First inverts the sequence. Generate the actual load file first, in the target system’s exact format, from raw extracts. Put real part numbers, real vendors, real orders in front of the people who know them.
Let them reject bad data they can see, not abstractions they have to imagine. Turn every fix into a rule that sticks. Iterate until clean. Then load.
A spreadsheet reviews a theory. The load file is the evidence.
Seven terms. This is how the method gets talked about; take them.
The extract challenge: 45 minutes, your data, no slideware.
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