Mitigating the obsolescence of quality specifications models in service-based systems

Romina Torres, Nelly Bencomo, Hernan Astudillo

Resultado de la investigación: Contribución a los tipos de informe/libroContribución a la conferenciarevisión exhaustiva

8 Citas (Scopus)

Resumen

Requirements-aware systems address the need to reason about uncertainty at runtime to support adaptation decisions, by representing quality of services (QoS) requirements for service-based systems (SBS) with precise values in run-time queryable model specification. However, current approaches do not support updating of the specification to reflect changes in the service market, like newly available services or improved QoS of existing ones. Thus, even if the specification models reflect design-time acceptable requirements they may become obsolete and miss opportunities for system improvement by self-adaptation. This articles proposes to distinguish "abstract" and "concrete" specification models: the former consists of linguistic variables (e.g. "fast") agreed upon at design time, and the latter consists of precise numeric values (e.g. "2ms") that are dynamically calculated at run-time, thus incorporating up-to-date QoS information. If and when freshly calculated concrete specifications are not satisfied anymore by the current service configuration, an adaptation is triggered. The approach was validated using four simulated SBS that use services from a previously published, real-world dataset; in all cases, the system was able to detect unsatisfied requirements at run-time and trigger suitable adaptations. Ongoing work focuses on policies to determine recalculation of specifications. This approach will allow engineers to build SBS that can be protected against market-caused obsolescence of their requirements specifications.

Idioma originalInglés
Título de la publicación alojada2012 2nd IEEE International Workshop on Model-Driven Requirements Engineering, MoDRE 2012 - Proceedings
Páginas68-76
Número de páginas9
DOI
EstadoPublicada - 2012
Evento2012 2nd IEEE International Workshop on Model-Driven Requirements Engineering, MoDRE 2012 - Chicago, IL, Estados Unidos
Duración: 24 sept. 201224 sept. 2012

Serie de la publicación

Nombre2012 2nd IEEE International Workshop on Model-Driven Requirements Engineering, MoDRE 2012 - Proceedings

Otros

Otros2012 2nd IEEE International Workshop on Model-Driven Requirements Engineering, MoDRE 2012
País/TerritorioEstados Unidos
CiudadChicago, IL
Período24/09/1224/09/12

Áreas temáticas de ASJC Scopus

  • Software
  • Modelización y simulación

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