LIS - Update analysis

Dear,

we use the transaction MCSI (S630) for analysis of sales, but the user found a difference.

I don't have much knowledge about the process LIS and I would like to know if there is a tool to inform me, what billings documents updated this structure.

I found the day that the difference exist, and this day I have 5 billing documents, but I don't know with one is not update the structure, bacause the quantities are equal to many documents.

Thanks in advanced for your help

SD Consultant