Analysis And Design Of Modeling Course Of Workflow

As the scope of the enterprise is expanding uninterruptedly, the information resources are increasing unceasing at the surprising speed. To face such a different distribute, loose calculation, environment of coupling type, the information processing way to concentrate on tends towards ending. The administrative skill of workflow comes into being. The workflow will use the separation of logic and course logic, it can change the systematic function and only have to revise the course model, realize the integration administration of production and operation or the administration of the whole course, organize together people, information and tool validity and rational, raise the use rate of software, in order to bring the systematic into full play. Workflow technology can support enterprise to realize the control course of management and produce organization and realize the decision support, realize the request of the modern enterprise "pass proper information to proper person in proper time." Researching the workflow deeply has important meanings to the information degree, operational efficiency and competitive power.The sign of the relative ripe of the workflow is the establishment of alliance of workflow in 1993. This establishment means that the workflow technology has own position clearly in the research field of application computer.This alliance puts forward the system structure of the workflow administrative system; one intact workflow system includes modeling tool, the workflow executing server, management tool and the distributed structure with user interface. According to its system, its determinacy has ensured the mutual consistency among every component in the system, has determined too many links of the workflow from designing, developing to operating, different workflow model has formed different workflow system. The analysis and design of modeling course are focal points of this text.This text reviews the production and development of workflow at first; on this basis, provide the structure model of administrative system and consult models provided by the alliance, and has done the detailed explanation to each component and interface of these two models. Then classify the workflow system from several different respect: the business course realized by the workflow, the ground floor realize technology, task item that adopt transmit mechanism; we can read the introduction of the development trend and research focus of technology of workflow in the last part in chapter one.In chapter three, I have presented the overall structural design of the workflow; its background is my project during practice in the company. This system based on open J2EE platform, is a distributed three layers structure that make up by use layer, business logic layer, and data serve layer. Each composition, function and mutual relation to these three levels, etc. has been described in this text. In addition, this text has also enumerated the communication mechanism kind needed briefly in the system.The design of workflow model in Chapter three is the most important part of this text. This text make a brief summary of the model at first, the present several common workflow models that are representative, describe the plus and minuses of each model; then raise the workflow model based on activity network and service of the system, and has carried on the detailed argumentation to the element which made up the model, on this basis, has produced the basically controlling structure raised by the alliance. According to model element characteristic, this text has brief argumentation of hierarchical structure characteristic and level divide, the controlling structure and hierarchical structure basically of the model has settled solid foundation for realizing complicated system modeling. On the basis of Chapter three, Chapter four expounds the check of the workflow model. The check of the workflow model mainly means the rationality measuring in order to carry on rationality measuring, this text flow job every level model...