In today's competitive marketplace, companies must focus scarce resources on the strategies most likely to yield success. Business Intelligence Systems (BIS) help them achieve this focus giving the complete vision to learn from the past, monitor and communicate the present, and gain insight into the future. Depending upon the level of BIS maturity companies have different information quality they can base their decision upon. The better the quality of information, the more sound business decisions companies can take and also appropriately carry out business process change for improving their performance. For all these reasons, the authors try to show throughout a case study, how BIS enhancement contributed to business process improvement in a Slovenian transport company.