Consumption values are used as a basis for forecasting.
There are two sorts of consumption in a material master record:
Total consumption
This is the sum of planned and unplanned consumption.
If materials are planned using consumption-based planning, the system always updates the total consumption.
If materials are planned using material requirements planning (MRP) and withdrawn on the basis of a reservation, the system updates only the total consumption, provided the quantity withdrawn does not exceed the reservation.
Unplanned consumption
This is updated only for materials planned using MRP. This occurs in the following cases:
If goods are withdrawn from the warehouse without a reservation
If goods are withdrawn on the basis of a reservation, but the quantity actually withdrawn exceeds the reservation
Planned consumption is not displayed in the material master record. However, you can calculate it yourself by subtracting unplanned consumption from total consumption.
The system normally updates the consumption values in the material master record automatically whenever stock is withdrawn from the warehouse. However, you can enter consumption values manually for the following purposes:
As a basis for the first forecast
To correct automatically updated consumption values if the values are atypical and would distort the next forecast