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Four to six weeks ahead: catching material risk before it bites
Demand = BOM × Plan − Stock − Incoming, watched continuously.
Most material shortages are visible weeks in advance — if someone is doing the arithmetic every day across every order. No one has time to.
A standing calculation, not a monthly report
The sourcing agent keeps a continuous figure: demand equals BOM times plan, minus stock, minus what is already incoming. When the gap threatens a deadline, it raises an alert.
The result is four to six weeks of lead time on risk that used to surface only when a line ran dry.