BI tools are bits of software that are very good at manipulating large volumes of data, very quickly. They can help glean powerful information like performance metrics and trends. This kind of information is great … to some people. It’s generally best suited to people who work within business analysis. The data and trends that come out of it will give you detailed performance data for whatever data silo is being looked at. It’s detailed and specific, you will be able to drill down to a single transaction level if that’s what is needed. It is, however, a bit of a one way street, it will provide the information but won’t help manage performance using the information.