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.

Power approximation for computing ( s , S ) policies using service level

Abstract: The paper presents an analytic approximation for computing s, S policies for single items under periodic review with fixed ordering costs, linear holding costs and a service level requirement. The replenishment lead time is fixed and unfilled demand is backlogged. The approximation is similar to Ehrhardt's "Power Approximation." However, we do not assume the knowledge of shortage costs, which are difficult to estimate in practice. We define a γ-service level which measures the average backlog relative to the average demand. This quantity is easy to understand and frequently used in practice. The resulting power approximation policies are easy to compute and require only knowledge of the mean and variance of demand. Computational results show that the approximation gives a γ-service level which is within one percentage point of the required service level in most cases. Furthermore, the expected total costs of the approximation, taking into consideration a penalty cost for stockouts, are well within one percent of optimal.

Structural equation model for effective CRM of digital content industry

Abstract: Digital contents industry has been expanding its business based on broadband internet technology. But service level of contents provider has not reached the expected level of customers in the context of CRM yet. In this paper, we develop a structural equation model for customer satisfaction index (CSI) to measure the level of digital contents service quality reflecting the aspects of contents quality, service quality and provider quality. Our proposed model is applied to various types of contents such as on-line games, mobile contents, internet VOD services and e-music. The results give us the controllable feedback information to effectively improve customer satisfaction for each kind of digital content industry.

Monitoring WS-Agreement s: An Event Calculus–Based Approach

Abstract: In this chapter, we present a framework that we have developed to support the monitoring of service level agreements (SLAs). The agreements that can be monitored by this framework are expressed in an extension of WS-Agreement that we propose. The main characteristic of the proposed extension is that it uses an event calculus–based language, called EC-Assertion, for the specification of the service guarantee terms in a service level agreement that need to be monitored at runtime. The use of EC-Assertion for specifying service guarantee terms provides a well-defined semantics to the specification of such terms and a formal reasoning framework for assessing their satisfiability. The chapter describes also an implementation of the framework and the results of a set of experiments that we have conducted to evaluate it.

HAND: Highly Available Dynamic Deployment Infrastructure for Globus Toolkit 4

Abstract: Grid computing is becoming more and more attractive for coordinating large-scale heterogeneous resource sharing and problem solving. Of particular interest for effective grid computing is a software provisioning mechanism. We propose a highly available dynamic deployment infrastructure, HAND, based on the Java Web services core of Globus toolkit 4. HAND provides capability, availability, and extensibility for dynamic deployment of Java Web services in dynamic grid environments. We identify the factors that have impact to dynamic deployment in static and dynamic environments. We also present the design, analysis, implementation, and evaluation of two different approaches to dynamic deployment (service level and container level), and examine the performance of alternative data transfer protocol for service implementations. Our results demonstrate that HAND can deliver significantly improved availability and performance relative to other approaches