MTS 202 · DEMAND CONSUMPTION
How does actual demand consume the forecast?
MTS uses forecast to prepare common stock before orders exist. When actual customer demand arrives, consumption rules prevent MRP from treating forecast and order demand as two separate requirements.
THE DECISION
Which demand signal should replenish stock?
Planning strategy defines whether customer demand consumes planned independent requirements, the direction and time window of consumption, and what remains visible to MRP. A correct sales order can create an incorrect replenishment result if it consumes the wrong PIR—or none at all.
Create PIR
Plan expected demand by material, plant, quantity, and date.
Receive actual demand
The sales order is evaluated against the selected planning strategy.
Reduce the planned signal
Consumption rules identify the PIR and quantity that actual demand replaces.
Plan the remaining position
MRP sees remaining forecast, actual demand, stock, and supply—not duplicated demand.
DIAGNOSTIC EVIDENCE
Read the demand relationship before changing stock parameters
Planned quantity, date, plant, version, and remaining quantity.
Material, plant, schedule line, requested date, and confirmed quantity.
Planning strategy, consumption mode/window, consumed PIR, and remaining forecast.
A forecast of 100 units exists for June. A customer orders 40 units within the consumption window. If the order consumes 40 PIR units, MRP plans the remaining demand correctly; if it does not, MRP can plan 140 units before considering stock.
Once demand is correctly represented, MRP can create explainable supply proposals.