Batch Determination in the PI sheet 
Use
You use this function in the PI sheet when you enter material consumptions for material components that are to be handled in batches. The function helps you to find suitable batches for the corresponding material component.
Batch determination is used in the whole of logistics. The basic processes and prerequisites for this are always identical. For more information, see the R/3 Library LO - Batch Management under
Batch Determination.However, depending on where batch determination is used, certain special features may need to be taken into account. These features result from the context of the respective individual application. The following sections describe what you must bear in mind when you use batch determination in PI sheets.
Prerequisites
You have installed the application component Batch Management (LO-BM).
In this component, a batch search procedure together with the corresponding strategy types and search strategies has been defined for the order type (refer to
Batch Search Strategy).The material component for which you want to find a batch meets the following requirements:
A process data request has been defined for the PI sheet and meets the following requirements:
The value of this characteristic must be identical to the base or alternative unit of measure of the material.
Features
Determining Suitable Batches
Having entered the required material quantity, you start batch determination manually in the PI.
Just like in the process order, the following criteria are used for selection:
The system determines the selection criteria using the following data:
The system determines suitable batches by comparing the selection criteria with the classification data in the batch master record.
The system checks whether the batches are available at the time when batch determination is carried out. The following checking rule is used (refer to Customizing for availability checks).
If no checking rule has been defined, the availability check and batch determination is terminated.
The system uses the data defined in the batch search strategy. If no suitable search strategy has been defined, batch determination is terminated.
Copying Batches
When the system has determined suitable batches, you can copy them into the PI sheet. You can use the following functions:
If batch determination in the background is defined in the batch search strategy, the system copies the proposed quantity it determines directly to the PI sheet.
If batch determination in dialog is defined in the batch search strategy, the system displays the proposed quantity. You can change the quantity if you want and then copy the batch. However, a batch split, that is copying several batches, is only allowed if:

When you copy a batch into the PI sheet, the system - unlike in the process order - does not create or update a reservation. For this reason, the wrong batches may be selected in the following cases:
For this, make sure that process messages are sent immediately and thus goods issues are posted as quickly as possible when you create and maintain your PI sheets.