For an explanation of the fields: See Fields
Lot sizes for the calculation can be stored here.
If the lot sizes are stored, the calculations must be created. This creates a separate calculation for each lot size.
After the calculations have been created, you can prepare them. This will create a new schemas to which the specified precalculation schema template will be applied.
Each calculation created from a process is linked to it. Thus, you can find and open the created calculations for a process.