Purpose
You can add your own scenarios to the ALE business processes provided in the standard system.
You can use one of two programming models to do this. Each dispatches a different type of message:

Developers of desktop applications can also implement ALE business processes using the
IDoc Class Library for C++.Client copy: logical system name in document header data.
When you are copying clients and logical systems have been defined for a client, logical systems must be converted in the header data of the copied documents, so that these documents can be found again in the new client.
When you are evaluating the statistics of documents, you have to check whether this field contains the logical system of the current client or the value SAPCE.
Only when these two conditions have been met, are documents from the current client included in the statistical evaluation.