BI is a commonly used term with a raft of different interpretations. Wikipedia begins to define it thus:
BI technologies provide historical, current, and predictive views of business operations. Common functions of Business Intelligence technologies are reporting, online analytical processing, analytics, data mining, business performance management, benchmarking, text mining, and predictive analytics.There's a BI evolutionary path that starts with simple, static reporting on historic data (often delivered with spreadsheets) through to real-time predictive analytics embedded into front-office transactional systems. Many suppliers who claim to offer BI systems barely get off the ground on the BI flight to delivering real value to the enterprise.
All those products that offer sexy, shiny, slick graphics with animated 2.5D fuel gauges that make your historic data look exciting but don't begin to tell you about where you're headed are flattering to deceive. If you're considering implementing a BI solution, make sure your chosen software will give you the headroom to grow the value that the solution delivers. Don't box yourself in with a sexy solution that ultimately offers no real intelligence.