JSM 2005 - Toronto

Abstract #302866

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Legend: = Applied Session, = Theme Session, = Presenter
Activity Number: 177
Type: Topic Contributed
Date/Time: Monday, August 8, 2005 : 2:00 PM to 3:50 PM
Sponsor: Business and Economics Statistics Section
Abstract - #302866
Title: Incremental Quantiles for Monitoring Business Services
Author(s): Scott Vander Wiel*+ and Diane Lambert and John M. Chambers and David A. James
Companies: Bell Labs, Lucent Technologies and Bell Labs, Lucent Technologies and Bell Labs, Lucent Technologies and Bell Labs, Lucent Technologies
Address: Rm 2C 273, Murray Hill, NJ, 07023, United States
Keywords: agent ; data stream ; single pass
Abstract:

Business services can be large-scale operations managed for quality assurance and improvement. For example, telephone call centers need to utilize agents efficiently to handle large service volumes. Similarly, Application Service Providers (ASPs) need to monitor network-based business products to ensure they deliver high-quality eCommerce, database transactions, and network meeting services. Quality often is measured by software agents running at a large number of distributed service stations. We describe the Incremental Quantile (IQ) algorithm for calculating approximate quantiles on data collected at a large number of stations and over many successive time intervals. IQ uses a fixed amount of memory to update a set of quantile estimates as new data accumulate into small batches. The algorithm can be run at distributed stations and at a central monitoring location where quantiles are aggregated to report summaries at various time scales and over various groupings of the service stations. IQ has proven to be accurate when tested on real network service data and simulated data under various scenarios.


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Revised March 2005