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Study On Identification And Analysis Of Requirement Change Based On Dependent Situation Network

Posted on:2013-01-16Degree:MasterType:Thesis
Country:ChinaCandidate:G H LiFull Text:PDF
GTID:2268330425991965Subject:Computer application technology
Abstract/Summary:PDF Full Text Request
Recent years, researchers have focused on studying service evolution from aspect of users’requirement change, which guarantees constantly development of service system. In service system, the continuous change of users’requirement and the unpredictability of environment may result in the variation of Web service and the SLA of service composition. By effectively managing these variations, service evolution enables service system to adapt to service environment and users’requirement. With the constantly research in service evolution, it becomes one of the urgent and focused problems that how to achieve high-efficiency and iterative service evolution by rapid and iterative identification and analysis of users’ requirement change.To solve this problem, this thesis presents a new kind of identification and analysis methods of requirement change based on dependent situation network (DSN), by which service use-pattern requirement change and business requirement change can be runtime identified and analyzed in order to obtain the guiding data for maintainning target tree of service system to support service evolution. This thesis breaks the whole problem into three parts:first presenting the framework for identification and analysis of requirement change based on DSN, second generating and dynamically adjusting of DSN, and finally identifying and analyzing requirement change based on DSN.In presenting the framework based on DSN, this thesis analyzes the different types of users’requirement change and the lifecycle of service evolution based on DSN; studies the definition of DSN model and the framework for identification and analysis of requirement change based on this model; finally proposes some basic models and algorithms in the framework. In generating and dynamically adjusting of DSN, this thesis studies a method to transform goal tree into DSN based on petri nets and presents three kinds of dynamically adjusting method of DSN by different trigger modes. In identifying and analyzing requirement change based on DSN, this thesis studies the MDSN model to predict users’ business requirement and presents users’business requirement prediction method based on MDSN; proposes the description of requirement change and studies the identification method of service use-pattern requirement change and business requirement change; presents the the description of analysis result of requirement change and studies pre-processing method and analyzing method of requirement change. Eventually, a case study in academic report scene is presented to give the validity of using the identification and analysis methods of requirement change based on DSN to identifiy and analyze users’requirement change, which will support service evolution.
Keywords/Search Tags:Service Evolution, Requirement Change, Service Evolution Requirement, DSN
PDF Full Text Request
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