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首页> 外文期刊>KSCE journal of civil engineering >A Mixed (Continuous + Discrete) Time-Cost Trade-Off Model Considering Four Different Relationships with Lag Time
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A Mixed (Continuous + Discrete) Time-Cost Trade-Off Model Considering Four Different Relationships with Lag Time

机译：考虑滞后时间的四种不同关系的混合（连续+离散）时间成本权衡模型

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摘要

Numerous Time-Cost Trade-Off (TCTO) models have been developed to identify the best combination of time and cost in a critical path network. Although there are four relationships in the critical path network, most of the models developed so far have considered only the Finish-Start (F-S) relationship. Thus, an advanced TCTO model that considers all four relationships between activities was developed in this study to accurately present a project, and is presented in this paper. The model also takes into account the lag time between activities. Previous TCTO models minimize the total project cost based on the given crash scenario. Moreover, to enhance the practicality, the model was developed to work with various TCTO scenarios such as continuous, discrete, and even mixed (continuous + discrete). The combined scenario reflects the most realistic situation. Two independent scenarios cannot be combined without mathematical modifications since a rudimentary mixing of two scenarios may provide an incorrect solution. A new formulation technique is introduced to merge the two independent scenarios mathematically and it guarantees the optimal solution.
机译：已经开发了许多时间成本折衷（TCTO）模型来确定关键路径网络中时间和成本的最佳组合。尽管关键路径网络中存在四种关系，但是到目前为止开发的大多数模型都只考虑了“完成-开始”（F-S）关系。因此，本研究开发了一种高级TCTO模型，该模型考虑了活动之间的所有四个关系，从而可以准确地介绍一个项目，并在本文中进行介绍。该模型还考虑了活动之间的延迟时间。先前的TCTO模型基于给定的崩溃场景将项目总成本降至最低。此外，为了提高实用性，模型被开发为可用于各种TCTO场景，例如连续，离散甚至混合（连续+离散）。组合方案反映了最现实的情况。如果没有数学修改，则无法合并两个独立的方案，因为两个方案的基本混合可能会提供错误的解决方案。引入了一种新的公式化技术，以数学方式合并两个独立的方案，它可以保证最佳解决方案。

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