Extrapolating the Inventory Sampling

Extrapolating the Inventory Sampling

In inventory, the counting results of the randomly selected inventory management units are extrapolated for all stock management units in the entire sampling area. The counting results of the complete-count area are also used for the overall calculation. The system uses the two values to estimate a value for the inventory sampling stock population.

There are two types of extrapolation:

Provisional extrapolation occurs when inventory differences have only been posted for some of the selected stock management units. You can create any number of provisional extrapolations; the last provisional extrapolation created is saved.
Final extrapolation occurs when all differences have been posted, i.e. all counting results have gone into the calculation and no subsequent random selection is necessary. Final extrapolation can only be carried out once, because no new results can be included after final extrapolation occurs.

Different mathematical procedures can be used for the extrapolation. The R/3 System currently supports the procedure of stratified mean-value estimation. In the stratified mean-value estimation, the following calculations are carried out based on the values of the posted inventory sampling elements:

Estimated actual-value mean per stratum
Estimated actual value of the entire area

On the Change Inventory Sampling: Initial Screen , enter the following data:

Field

Data

Inventory sampling

Inventory sampling created earlier

Year

Current year

Select Enter.

On the Change Inventory Sampling xxx: Header screen, select Transaction ® Extrapolation.

Select Goto ® List ® Extrapolation to display the results of this workstep.

Once the final extrapolation is performed, the inventory sampling is classified as successful or unsuccessful. In the case of a provisional extrapolation, the inventory sampling can be classified as conditionally successful.

If the inventory sampling is successful or conditionally successful, then it can be assumed that the book inventory balances of all of the materials participating in the inventory sampling correspond to the actual balances.

If the inventory sampling is not successful, then it must be assumed that there is a large variance between warehouse accounting and the actual inventory balances. It is then necessary to carry out a complete physical inventory for all uncounted elements.

Select Back.

Select Save.

Return to the main SAP R/3 System screen.

End of process chain

Field	Data
Inventory sampling	Inventory sampling created earlier
Year	Current year