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Method of non-functional requirements balancing during service development

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Author(s): Larisa Globa | Tatiana Kot | Andrei Reverchuk | Alexander Schill

Journal: Journal of Theoretical and Applied Computer Science
ISSN 2299-2634

Volume: 6;
Issue: 3;
Start page: 50;
Date: 2012;
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Keywords: OCS | service deployment | non-functional requirements | requirements balancing

ABSTRACT
Today, the list of telecom services, their functionality and requirements for Service Execu-tion Environment (SEE) are changing extremely fast. Especially when it concerns require-ments for charging as they have a high influence on business. This results in the need for constant adaptation and reconfiguration of Online Charging System (OCS) used in mobile operator networks. Moreover any new functionality requested from a service can have an impact on system behavior (performance, response time, delays) which are in general non-functional requirements. Currently, this influence and reconfiguration strategies are poorly formalized and validated. Current state-of-the-art approaches are considered methodolo-gies that can model non-functional or functional requirements but these approaches don’t take into account interaction between functional and nonfunctional requirements and col-laboration between services. All these result in time and money consuming service devel-opment and testing, and cause delays during service deployment. The balancing method proposed in this paper fills this gap. It employs a well-defined workflow with predefined stages for development and deployment process for OCS. The applicability of this novel ap-proach is described in a separate section which contains an example of GPRS service charging. A tool, based on this method will be developed, providing automation of service functionality influence on non-functional requirements and allowing to provide a target de-ployment model for a particular customer. The reduction of development time and thus nec-essary financial input has been proved based on real-world experiments.
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