Reducing Forecast Requirements

Forecast requirement values created during the forecast run are displayed on the time axis as issues:

In MRP, the reduction of forecast requirements only differs in two aspects:

The results of the forecast are transferred to material requirements planning as forecast requirements and are displayed on the time axis. In the following example, the reduction of forecast requirement quantities is shown by consumption.

Reduction of forecast requirement quantities

 

 

Forecast

reqmt

Available for

plng

Withdr.

posting

Reduction

After

reduction

Period 1

1000

1000

400

400

600

Period 2

1000

1000

0

0

1000

Period 1

1000

1000

1200

1000

0

Period 2

1000

1000

0

200

800

 

Goods issue results in a withdrawal posting and reduces the current period's forecast requirement by the amount withdrawn. If the goods issue was higher than the corresponding forecast requirement, the remaining amount is subtracted from the following period's forecast requirement.

In this example, a goods issue of 400 pieces was posted in the first period. As a result, the forecast requirement of 1000 pieces was reduced by 400 pieces. In the first period, 600 pieces are still available for planning.

If consumption (that is, the goods issue) (1200) in the first period is higher than the original forecast requirement (1000) then the forecast requirement for the following period (1000) is reduced by the remaining amount (1200 - 1000 = 200). That means that in the first period, 0 pieces are still available for planning and in the second period, 800 pieces.