David Lai is a SAP BusinessObjects consultant and specializes in data visualization and data warehousing. He graduated with a degree in computer engineering from the University of Toronto. He has a passion for providing organizations with smart Business Intelligence solutions that encompass best practices and techniques. In addition, he is an active contributor to the community and provides his knowledge in best practices and solutions.
He started his Business Intelligence blog (http://www.davidlai101.com/blog) in 2008, where he provides tips, tricks, and best practices for Xcelsius and BusinessObjects-related material. He is a bronze-level contributor to the SAP community network, has presented at SAP InsideTrack, and provides BusinessObjects training to students.
Aside from work, David enjoys physical activities such as weight training, basketball, volleyball, and skiing. He also has a strong passion for Latin dance.
David is the owner of Xinfinity Solutions, where he provides consulting services as a SAP BusinessObjects consultant. He has worked for a long list of satisfied clients in various industries.

Xavier Hacking is an SAP BI specialist from Eindhoven, the Netherlands, and works as a consultant for Interdobs. He has a master's degree in industrial engineering and management science from the Eindhoven University of Technology. He has worked with a wide range of products from the SAP Business Intelligence portfolio, including SAP BW, SAP BusinessObjects Dashboards, Design Studio, Web Intelligence, Crystal Reports, and the SAP BusinessObjects BI Platform. His main focus is dashboard development within the various SAP environments.
Xavier is the coauthor of the first edition of this book and the book Getting Started with SAP BusinessObjects Design Studio, SAP Press. He writes for the SAP Experts BI Hub and has his own blog related to Business Intelligence at HackingSAP.com (http://HackingSAP.com/). You can follow Xavier on Twitter (http://twitter.com/xjhacking).