Does anyone have documentation on how ME87 and purchase history table archiving works? I have read all the OSS notes and discussions that can be found but not seen anything that tells how the logic works. We've been testing and understand that it aggregates purchase history receipts and invoices but not sure what is the criteria for determining which records get added to EKBEH and removed from EKBE. We had assumed that it did an aggregation then wrote all of the EKBE records to EKBEH but this doesn't appear to be the case as EKBEH only contains those purchase history records where there are a large number (>4?) EKBE records. Any thoughts would be appreciated.