ECR offers many options through its reports.
ECR touch also archives sales so there is no need to have "add ons" like a back office.
You are able to print reports off from the receipt printer or go more in-depth through A4 reports
This can produce graphs such as your best selling items (by value or profit) to the worst selling items
ECR can produce graphs on staff performance and which staff make the most sales.
Product reports can tell you the margins and profits you are making.