Research On General Quality-Driven Engineering Project Definition System

Engineering project control system is one of the three essential factors that determine the success or failure of engineering project. Project Definition is the primary stage in the engineering project control system. In view that the undesirable tendency, which project control cycle is longer than the project demand change cycle, commonly exists in the controlled domain of large-scale infrastructure engineering construction of our country at present, the general quality driven engineering project control strategy and model architecture are initially proposed in this article. Based on it, corresponding engineering project definition system model and methodology are thoroughly discussed.Firstly, the insufficiency of existing project control system, which takes the triangle target system constituted by the"schedule, cost and technical performance"as the driving force, is analyzed. The basic thought of General Quality Driven engineering project control system is proposed on the basis of discriminating the inner relation of the general quality and the triangle target system. The thought and principle of large system intelligence control is profited, and the general quality driven project control system is analyzed from multiple layers, such as control principle, control process model, control mechanism model, control function system, control structure model and control information model, etc. What's more, the characteristic of its technology method system is preliminary analyzed.The structural and social complexities of the project definition in the general quality driven project control system are analyzed via"Wicked Problem"theory. In terms of the general principle of distributed cooperative expert system design,the architecture of the gerenal quality driven project definition system was proposed,which integrating the Semantic Web,Case-Based Reasoning and Multi-Agent System.On the basis of analyzing the constitution and characteristic of the engineering project definition knowledge base, the principle of project definition case expression based on the RDF (Resource Description Framework) model is discussed. The case expression and organization method of engineering project definition based on Ontology Annotation is proposed. Still on this basis, the expression and the development method of the monotonous rule knowledge and default rule knowledge are initially discussed in the CBPDS knowledge base. In view of the distributed characteristic of the CBPDS knowledge library, the sharing and the integrating method of the distributed knowledge base based on contextualizing Ontology is initially discussed.The case retrieval model based on the Multi-Agents collaboration is put out, which is the main element of case-based reasoning engine. Furthermore, each agent behavior in the case retrieval process is formally defined. Then the case retrieval methods design is carried on from segments, such as the case query formulation, the abstract case match, the semantic similar computation in concrete case match and the query reformulation in a distributional environment.The case adaptation in the CBPDS is regarded as a constraint satisfactory problem solving process. Considering the characteristic of constraint in CBPDS, the engineering project definition case adaptation model based on the dynamic distributed constraint satisfactory problem solving is put up, the definition method of the constraint satisfactory problem based on RDF, Ontology and the Semantic Web Rule Language (SWRL) is discussed. Furthermore, the method design is carried on from the case adaptation initialization, case local adaptation, the merge of case adaptation solution, the overall appraisal of case global adaptation and the synthesis cost.Take certain city rail transit project for an example, the general quality driven control principle of engineering project and the CBR-Based project definition problem solving method is practically elaborated, and the further development and the deepened direction of this research are further discussed.