Program Manager responsible for developing performance tools at Microsoft Corporation since 1998, Mr. DeLuca is currently developing performance and capacity planning solutions for Microsoft's Distributed Management Division. While at Microsoft Mr. DeLuca has written three other books and has filed for eleven patents for work in capacity planning and performance. Prior to working at Microsoft, Mr. DeLuca worked as an architect engineer at Oracle Corporation, where he co-invented and developed the Oracle System Sizer. In addition to his work at Microsoft and Oracle, Mr. DeLuca has performed the function of performance engineer specializing in sizing and capacity planning for such organizations as DEC, Tandem, Apple, and the U.S. Air Force. Mr. DeLuca has been participating in performance benchmarks, developing performance tools, and lecturing about them around the world since 1980.