2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/30498The performance of successful Web-based e-commerce services has all the allure of a roller-coaster ride: accelerated fiscal growth combined with the ever-present danger of running out of server capacity. This chapter presents a case study based on the author's own capacity planning engagement with one of the hottest e-commerce Web sites in the world. Several spreadsheet techniques are presented for forecasting both short-term and long-term trends in the consumption of server capacity. Two new performance metrics are introduced for site planning and procurement: the effective demand, and the doubling period.15 pages; To appear in the book entitled "Performance Engineering - State of the Art and Current Trends," Lecture Notes in Computer Science, Springer-Verlag Heidelberg, 2001PerformanceDistributed, Parallel, and Cluster ComputingSoftware EngineeringC.4;D.2.8;D.4.8;H.3.5text