Topic
Service level
About: Service level is a research topic. Over the lifetime, 7647 publications have been published within this topic receiving 126093 citations. The topic is also known as: service level.
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TL;DR: In this paper, a review of current academic literature and best trade practices identifies open questions and directions for further research and applications of PAP, and simultaneously addresses the variety, depth, and service level aspects of assortment planning to provide a more thorough understanding.
238 citations
04 Jul 2011
TL;DR: An upper bound on the total profit is provided and an algorithm based on force-directed search is proposed to solve the resource allocation problem for multi-tier applications in the cloud computing.
Abstract: With increasing demand for computing and memory, distributed computing systems have attracted a lot of attention. Resource allocation is one of the most important challenges in the distributed systems specially when the clients have Service Level Agreements (SLAs) and the total profit in the system depends on how the system can meet these SLAs. In this paper, an SLA-based resource allocation problem for multi-tier applications in the cloud computing is considered. An upper bound on the total profit is provided and an algorithm based on force-directed search is proposed to solve the problem. The processing, memory requirement, and communication resources are considered as three dimensions in which optimization is performed. Simulation results demonstrate the effectiveness of the proposed heuristic algorithm.
233 citations
TL;DR: In this article, the authors developed a relationship between aggregate safety stock inventory levels and component part commonality, and a simulation experiment strongly supported the functional form of this relationship in an uncertain operating environment.
Abstract: The relationship between aggregate safety stock inventory levels and component part commonality is developed. A simulation experiment strongly supports the functional form of this relationship in an uncertain operating environment.
Managers can use these equations to assess the trade-offs between aggregate safety stock levels, service level and the degree of component part standardization. For example, these relationships can be used to predict service, inventory level and cost standards for any change in component part commonality.
227 citations
TL;DR: A survey of the state of the art of QoS modeling approaches suitable for cloud systems is provided, which review and classify their early application to some decision-making problems arising in cloud QoS management.
Abstract: Recent years have seen the massive migration of enterprise applications to the cloud. One of the challenges posed by cloud applications is Quality-of-Service (QoS) management, which is the problem of allocating resources to the application to guarantee a service level along dimensions such as performance, availability and reliability. This paper aims at supporting research in this area by providing a survey of the state of the art of QoS modeling approaches suitable for cloud systems. We also review and classify their early application to some decision-making problems arising in cloud QoS management.
225 citations
06 Jun 2004
TL;DR: This paper provides a novel DAML-QoS ontology as a complement for DamL-S ontology to provide a better QoS metrics model and three layers are defined together with clear role descriptions for developments.
Abstract: As more and more Web services are deployed, Web service's discovery mechanisms become essential. Similar services can have quite different QoS levels. For service selection and management purpose, it is necessary to explicitly, precisely, and unambiguously specify various constraints and QoS metrics for Web services descriptions. This paper provides a novel DAML-QoS ontology as a complement for DAML-S ontology to provide a better QoS metrics model. Three layers are defined together with clear role descriptions for developments. Cardinality constraints are utilized to describe the QoS property constraints. Basic profile is presented for general Web service's description and the speed startup of ontology definition. Matchmaking algorithm for QoS property constraints is presented and different matching degrees are described. When incorporated with DAML-S, multiple service levels can be described through attaching multiple QoS profiles to one service profile. Well-defined Metrics can be further utilized by measurement organizations to guarantee the promised service level.
225 citations