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 Posted: Thu 0:32, 02 Dec 2010 Post subject: mbt sandals shoes Manufacturing Enterprise Logisti |
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Manufacturing Enterprise Logistics System Modeling Technology
Graphics. Top-down and bottom-up method of combining this method can decomposition characteristics. Graphic significance of the model Figure 3IDEFO 2.1.3 IDEF0 model into the simulation model of GI-SIM method for the third step is to IDEF0 model into a simulation model. In the GI-SIM,[link widoczny dla zalogowanych], the simulation operation plays a very important role. Because in this step will be in the structure / function model introduced the concept of the definition of the dynamic characteristics of the system, so that the simulation model of the real capacity of the system modeling and analysis than any other single technique stronger. In system design, the third step is very important because it can through some simple form or other methods for each of the options to provide some measure of performance to help develop decision-making. The behavior of the logistics system to a better understanding of the implementation of modeling, you must be analog or simulation. Therefore, the concept of analog devices and integrate modeling tools can solve many problems associated with system modeling, but also can reduce the description of conceptual / functional model generated by uncoordinated and inconsistent. In general, the simulation results are usually used to provide and confirm the system specific parameters, including the first two steps to get the conditions and activities of the time-domain cycle and so on. The dynamic model used to evaluate the systems analysis phase of system parameters, or system defined in the design phase of new decisions / activities variables. In the system design phase, you must use the results obtained in the analysis phase of the GRAI grid and the operation of a number of specific variables to assess and re-design. Design models often start the basic elements of the system,[link widoczny dla zalogowanych], that is the simple concept of the first to be modeled. In order to take full advantage of the previous model, in constructing a functional model of complex systems before they must be highly abstract, so that future changes to the existing system, or the introduction of new manufacturing / logistics strategy provides a good foundation. GI-SIM method is also more flexible and dynamic modeling phase: it provides users with more than a simulation model to deal with manufacturing / logistics decision-making changes, but also allows integrated design and development work. With this hierarchical method, the user is easy to understand decision-making / general objective of activity centers, and its establishment of reference standards. GRAI grid and IDEF0 model represents the static aspects of this model,[link widoczny dla zalogowanych], the simulation model reflects the dynamic aspects of the system. 2.2 SI-GII Ⅵ law summary and evaluation, and other consistent use of systems analysis and design methods, GI-SIM method has obvious advantages: it concentrated more flexible modeling of three important ideas (concepts, function, simulation), through the conceptual model,[link widoczny dla zalogowanych], functional model and dynamic model to a comprehensive and detailed description of the logistics system, logistics system from the structure to its specific parameters that, while the method also reflects the dynamic aspects of the system being modeled. Using the GI-SIM method can complete logistics system modeling analysis and design, and has the following characteristics: 1) model using simple graphics to represent the activities of logistics centers and a variety of decision-making process, which makes it easy to understand the logistics overall system strategy and the links between the various functions of the organization. 2) on center using structure / function representation system for people to understand the logistics requirements of the specific operation and provide a good foundation. 3) the lowest level of IDEF0 model simulation activities, so that people on the dynamic properties of the logistics system, a certain understanding and awareness. 3 Conclusions This article describes an integrated modeling GI-SIM method, it is through GRAI, IDEF0 modeling tools and simulation models to complete the manufacture of three logistics systems analysis and design: the total system with the GRAI grid, said the organization / structure view, the use of IDEF0 technique described in a variety of activities center, through simulation technology will in the GI-SIM method IDEF0 model of the bottom of the model is transformed into computer models, and achieved through computer simulation. These features make the GI-SIM method of analysis and design of a logistics system a powerful way. References: [1] Ding Li Yan, Zhang Duo. Logistics Systems Engineering [M]. Beijing: Tsinghua University Press ,2000.12-21. [2] Liu Fei, Zhang Xiaodong, Yang Dan. Manufacturing Systems Engineering [M]. Beijing: National Defence Industry Press ,2000.91-100. [3] Chen Yu VI. IDEF modeling analysis and design methods [M]. Beijing: Tsinghua University Press, 1999.3.32. [4] Zhang Xiaoping, Yongnian Yan, Wu Yaohua and so on. Modern production logistics and simulation [M]. Beijing: Tsinghua University Press ,1998.181-194. [5] Shou-Ju. Modern manufacturing systems analysis and design [M]. Beijing: Science Press. 1999.33-55. ■
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