Piotr Walesiak is a Senior Consultant at Infovide, specializing in data warehousing and decision support solutions, with particular interest in finance and public administration applications. Since 1998, Mr. Walesiak has participated in numerous development and consulting projects as a team leader, data warehousing expert, leading architect, and solution architect. He is also a coauthor and instructor of many data warehouse and data quality courses offered by Infovide. Mr. Walesiak can be reached at pwalesiak at infovide.pl.