LOB初始调度方案工期优化问题研究

发布时间：2019-04-27 01:08

【摘要】：重复性项目在工程项目领域十分广泛,工期优化调度是重复性项目进度管理研究的热门研究问题之一。目前国内对一般的工程项目中的工期优化问题有大量的研究和算法模型,在理论和应用上都比较成熟。但是对于重复性项目中工期优化问题的研究较少,特别是很多研究中都未考虑LOB中一类特殊的工序:逆控制工序:其工期变化反向影响项目总工期的变化。考虑逆控制工序的特殊性质为工期优化的问题提供了新的解决思路和更佳的解决方案。本文针对LOB方法给出的初始调度方案常常超出工期的问题,建立重复性项目中的工期优化的间断模型和资源调整模型。目的是在满足项目合同工期要求的条件下,使得由于缩短项目总工期而增加的资源成本最低。首先考虑到逆控制工序的特殊性质,通过在逆控制工序中引入间断改变其资源分布情况,从而缩短工期。该模型能够在不增加任何资源配置的情况下达到缩短工期的目的。另外,本文针对更一般的情况建立了调整工作队数目的工期优化模型,针对不同的控制工序做出不同的调整方式,将LOB模型转化为GPRs模型,并建立了GPRs网络下的整数规划模型,GPRs网络能够很好地表示LOB方法中的时间约束关系,并且便于资源的调整。最后运用实例证明上述模型能够达到满足项目合同工期并且增加的成本最少。间断模型与资源调整模型各有优点,适用情况也有所不同,能够很好地解决LOB方法初始调度超出工期的问题,有利于项目管理者在实践中应用不同方法解决不同的问题。
[Abstract]:Repetitive projects are widely used in the field of engineering projects. Schedule optimization is one of the hot research issues in the research of repetitive project schedule management. At present, there are a lot of research and algorithm models on the optimization of time limit in general engineering projects in our country, which are mature in theory and application. However, there are few studies on the problem of project duration optimization in repetitive projects, especially many studies do not consider a special kind of process in LOB: inverse control process: the change of time limit has a reverse effect on the change of total project duration. Considering the special properties of the inverse control process, a new solution and a better solution to the problem of time limit optimization are provided. In order to solve the problem that the initial scheduling scheme given by the LOB method often exceeds the time limit, the discontinuous model and the resource adjustment model for the optimization of the time limit in repetitive projects are established in this paper. The aim is to reduce the total project duration and reduce the resource cost under the condition that the project contract time limit is satisfied. Firstly, considering the special properties of the inverse control process, the time limit is shortened by introducing discontinuous changes to the distribution of resources in the inverse control process. The model can shorten the time limit without increasing any resource allocation. In addition, in view of the more general situation, this paper establishes the optimization model for adjusting the number of task forces, makes different adjustments for different control processes, transforms the LOB model into the GPRs model, and establishes the integer programming model under the GPRs network. The GPRs network can well represent the time constraints in the LOB method, and it is convenient to adjust the resources. Finally, an example is given to prove that the above-mentioned model can meet the project contract duration and increase the minimum cost. The discontinuous model and the resource adjustment model have their own advantages and different application conditions. They can solve the problem that the initial scheduling of the LOB method exceeds the time limit well, and it is helpful for project managers to apply different methods to solve different problems in practice.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：F283

【参考文献】