WP-JRA-1.3

PO-JRA-1.3.1 Survey of quality related aspects relevant for SBAs — by Andreas Metzger — last modified May 19, 2009 10:09

Quality related aspects relevant for service-based applications cover a broad field of research, including work on quality modeling, QoS and SLA negotiation, as well as constructive and analytical quality assurance (like testing, monitoring and static analysis). This deliverable provides a survey of this broad field of “service quality” and identifies the key areas where research contributions are currently available. Based on this survey of the state of the art, important and emerging research challenges are identified that could be pursued in the future in order to close several of the gaps which emerge from the current state of the art on “service quality”.

CD-JRA-1.3.2 Quality Reference Model for SBA — by Benedikt Liegener — last modified May 19, 2009 10:10

The aim of this deliverable is two-fold. Firstly, it depicts the research vision of the workpackage, including the research challenges that will be addressed by the S-Cube consortium. Secondly, the deliverable aims at defining the S-Cube quality reference model. This reference model is intended to provide the S-Cube consortium with a unified terminology for describing different quality attributes of service-based applications. To this end, important quality models from service-oriented computing, business process management, grid computing and software engineering are analyzed. The quality attributes which are defined in these models and which are relevant for S-Cube are extracted and synthesized into the S-Cube quality reference model.

CD-JRA-1.3.3 Initial Concepts for Specifying End-to-End Quality Characteristics and Negotiating SLAs — by Osama Sammodi — last modified May 17, 2010 16:05

The aim of this deliverable is two-fold. Firstly, it aims at defining the initial concepts for specifying and negotiating end-to-end quality, i.e., a service quality meta-model suitable for the definition and negotiation of service quality specifications and SLAs. The research method for creating this quality meta-model follows a design approach. Initially, requirements are collected dictating the information, structure, and constraints that this meta-model should capture. Then, based on these requirements, the meta-model is designed and finally created. Secondly, this deliverable aims at proposing a methodology for decomposing end-to-end quality into quality specifications for individual SLAs. The research method for achieving this goal follows a hybrid approach: a proof-of-concept and a paper-based approach. In particular, the meta-model’s effectiveness and sufficiency is highlighted by modeling a composite service negotiation scenario and its result, which is a decomposition of end-to-end quality into quality specifications of individual SLAs. Then, initial attempts (materialized in papers of WP members) are provided that address (composite) service negotiation.

CD-JRA-1.3.4 Initial Set of Principles, Techniques and Methodologies for Assuring End-toend Quality and Monitoring of SLAs — by Osama Sammodi — last modified May 17, 2010 16:06

The aim of this deliverable is twofold: (1) It provides an updated overview of the research challenges of WP-JRA-1.3 (“End-to-End Quality Provision & SLA Conformance”). (2) It reports on an initial set of principles and techniques for assuring the end-to-end quality and of monitoring SLAs. Work related to these principles and techniques, carried out by S-Cube NoE participants and published in books, journals and conference proceedings, is summarized and assessed with respect to the coverage of the research challenges for this workpackage.