International Business Machines Corporation

Siu Hung Choy

Robert J Torres

Mary E Miller

Glenn Clement Aikens

Shawn Allen Clymer

Douglas Ronald Duer

Richard Arthur Franck

A service level agreement between a network service provider and a network user may require that specified service metrics or parameters be maintained within predetermined limits. To reduce the chance those limits (and the service level agreement) will be violated, the service metric is sampled periodically over successive sampling intervals. The mean value and the standard deviation of the set of samples obtained during the most recent sampling interval are used to screen out unreliable data. If the set of samples satisfies the reliability screening, the set is used in combination with past acceptable sets to determine the trend in the sampled service metric. If the trend is toward a violation, the time of the violation is predicted based on the assumption the current trend will continue. If the predicted time of violation is sufficiently near the current time, an alert is sent to the service provider to permit the service provider to initiate anticipatory corrective action.

Method, system and program product for managing network performance

On a data processing system, complex instructions, such as expert system rules, for operating the data processing system are created by providing a guide for the correct formulation of the instructions. A set of components relating to elements and actions used to formulate the instructions is provided to visually represent the elements and actions. The components are displayed as icons. An instruction is constructed by moving selected icons into a rule construction area. A selection of components that may correctly be inserted into the instruction is provided at each stage of construction of the instruction. Components that may not correctly be inserted into the instruction are disabled. The disabled icons are visually provided as 'grayed' icons. As the instruction is developed with additional icons, the selection of correct components changes to correspond to the changing instruction.

Method and system for guiding the formation of a correctly structured

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Durham, NC, United States of America

Siu Hung Choy