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Study on Network Planning Considering the Resource-dependency

Author: WuWeiXing
Tutor: WangRenChao
School: Tianjin University
Course: Hydraulic Structure Engineering
Keywords: Network Program Resource constraints Critical Path Method (CPM) Network mapping Network diagram of the dual - band number Particle swarm optimization
CLC: F284
Type: Master's thesis
Year: 2007
Downloads: 124
Quote: 2
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Abstract


With the application of network planning technology in engineering practice, it was found that the actual difference in the critical path method (CPM) time difference and the critical path and Engineering, The main reason can be attributed to: the existing network plan customized or are not considered in the calculation of the correlation between the step of resource constraints and on different lines. Since most of the actual project execution of each process is strictly limited by resources, so traditional CPM method does not give the correct the process total float and critical path. CPM defects, many researchers have proposed analytical model of the network schedule under resource constraints, which the Wiest raised RCS (resource-constrained scheduling) model is representative. This model, while considering the resource constraints, but in the forwardly from the rear calculation does not consider the parallel processes between the resource dependencies, so calculated resource dependencies step latest time than the true value, thereby step total lag increases accordingly. Process no later than the time of the increase or the increase of the total float will further affect the process of tightening before the process, the results of many of the key processes into a non-critical process, the critical path is no longer continuous, many processes of the total float is not true. Actual project management process, resource scheduling occupies an important position, and effective use of resources involved in the correlation of different lines, and therefore take full account of the transfer and effective use of resource constraints, is of great significance for ensuring the progress of the project to improve the level of project management. Resource constraints, consider the process of resource dependencies, improved RCS model, calculated the time difference and the key process of the process, to identify the chain of resources between processes on different lines and improved model of sensitive The degree of analysis. As can be seen from the calculation results of comparative analysis of engineering examples improved RCS model is more reasonable than Wiest RCS model derived parameters are more effective engineering guidance, so that the project managers for effective control and management of the project schedule . Dual with No. network diagram extensive use of the engineering sector in China, dual with No. network graph drawing method is more complex and there are more inadequate, so they need a simple and easy-to-understand method to draw the network Figure. Particle swarm optimization algorithm is introduced to the network diagram drawing of the dual-band number to establish the appropriate model, so draw reasonable network diagram, provides a new way to draw network diagram of the dual-band number.

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