分层网络技术及其应用研究

发布时间：2018-09-06 06:22

【摘要】： 现有的网络计划技术主要是针对单层的网络计划，难以有效地指导大型制造项目的生产。由于其生产过程复杂，工序成千上万，给对应的网络图描述带来了极大的困难，故实际生产进度计划中网络图只采用了不完全的形式。因此将分层的网络应用到大型制造项目的生产进度计划中对有效改善大型制造项目生产进度计划的质量有着极大的理论和实践意义。本文讨论了网络(计划)技术发展的历史和现状，对国内外网络技术发展的各个方面进行了全面的概述。针对现有网络技术中存在的问题，如对项目活动持续时间估计问题，进度安排问题，资源分配问题，风险分析问题进行了深入研究，提出了自己的见解，以此为基础，建立了分层网络技术，并对其进行了应用研究。本文在以下几个方面进行了重点讨论： 1．网络计划的层次分解方法研究：设计了网络计划的分层模型，确定了分解层次，提出了网络分层的原则，，揭示了不同层次网络之间的相互影响，相互制约关系，确定了各层子网络的时间参数计算公式，确定了计算步骤、计算框图。 2．分层网络计划的资源分配问题研究：针对分层后网络计划的资源优化问题，提出了局部连接子网络概念和构造思路，建立了基于局部连接子网络的工期固定约束下的资源均衡问题，并讨论了相应的算法。并对机械制造企业生产计划构造了局部连接子网络。 3．分层网络计划中风险问题的研究：以分析PERT模型为突破口，通过分层网络技术及其应用研究搞委引入风险因素影响矩阵，模拟风险因素对项目的各层子网络中各活动的影响，模拟活动的持续时间，从而模拟项目的总工期，确定项目工期的概率分布，为确定合理的网络计划提供科学依据。最后进行了风险因素与项目工期相关性分折，提出了判别主要风险因素的一种有效的方法。 4．以一个具体大型制造项目进度计划为案例，对分层网络技术的应用进行了实证研究。
[Abstract]:The existing network planning technology is mainly aimed at single-layer network planning, and it is difficult to guide the production of large manufacturing projects effectively. Because of the complexity of the production process and the thousands of working procedures, it is very difficult to describe the corresponding network diagram, so the network diagram in the actual production schedule only adopts the incomplete form. Therefore, it is of great theoretical and practical significance to apply hierarchical network to the production schedule of large-scale manufacturing projects to improve the quality of large-scale manufacturing projects. This paper discusses the history and present situation of the development of network (planning) technology, and summarizes all aspects of the development of network technology at home and abroad. Aiming at the problems existing in the existing network technology, such as estimating the duration of the project activity, scheduling, resource allocation and risk analysis, the author puts forward his own opinion, and based on this, The layered network technology is established, and its application is studied. This paper focuses on the following aspects: 1. The hierarchical decomposition method of network planning: the hierarchical model of network planning is designed. The decomposition level is determined, the principle of network stratification is put forward, the mutual influence and restriction relationship between different layers of network are revealed, the time parameter calculation formula of each layer subnetwork is determined, and the calculation steps are determined. 2. Research on Resource allocation of hierarchical Network Planning: aiming at the resource optimization problem of hierarchical network planning, In this paper, the concept and construction idea of local connection subnetwork are proposed, and the problem of resource equalization under fixed duration constraints based on local connection subnetwork is established, and the corresponding algorithm is discussed. And the production plan of the machinery manufacturing enterprise constructs the local connection sub-network. 3. The research of the risk problem in the stratified network plan: taking the analysis of PERT model as the breakthrough point, Research on hierarchical Network Technology and its Application The committee introduced the risk factor influence matrix, To simulate the impact of risk factors on each activity in the subnetwork of the project, and to simulate the duration of the activity, so as to simulate the total duration of the project, The probability distribution of the project duration is determined, which provides a scientific basis for the determination of a reasonable network plan. Finally, the correlation between risk factors and project duration is analyzed. An effective method for judging the main risk factors is put forward. 4. Taking a specific large-scale manufacturing project schedule as an example, Empirical research on the application of hierarchical network technology is carried out.
【学位授予单位】：湖南大学
【学位级别】：博士
【学位授予年份】：2001
【分类号】：F062.4

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