Applying Theory of Constraint on Logistic Management in Large Scale Construction Sites – A Case Study of Steel Bar in TFT‐LCD Factory Build‐Up

2008 ◽  
Vol 9 (1) ◽  
pp. 68-93 ◽  
Author(s):  
Chih‐Yao Huang ◽  
Ching‐Piao Chen ◽  
Rong‐Kwei Li ◽  
Chih‐Hung Tsai
Keyword(s):  
Large Scale ◽  
Scale Construction ◽  
Construction Sites ◽  
Logistic Management ◽  
Steel Bar ◽  
Theory Of Constraint

scholarly journals Sustainable Ship Loading Planning for Prefabricated Products in the Construction Industry

2020 ◽  
Vol 12 (21) ◽  
pp. 8905
Author(s):  
Wen Yi ◽  
Robyn Phipps ◽  
Hans Wang
Keyword(s):  
Construction Industry ◽  
Large Scale ◽  
Transportation Cost ◽  
Sustainable Transportation ◽  
Construction Site ◽  
Integer Optimization ◽  
Construction Sites ◽  
Capacity Limits ◽  
Proposed Model

This paper focuses on sustainable transportation of prefab products from factories to construction sites by ship. Since the transportation cost for all the prefab products of a construction site is mainly dependent on the number of cargo holds used on ships, a loading plan for prefab products that minimizes the number of holds required is highly desirable. This paper is therefore devoted to the development of an optimal loading plan that decides which prefab products are loaded into each cargo hold and how to pack these prefab products into the holds so that as few holds as possible are used. We formulate the problem as a large-scale integer optimization model whose objective function is to minimize the total number of cargo holds used and whose constraints represent the cargo hold capacity limits. We develop a heuristic to solve the problem and obtain a high-quality solution. We have tested the model and algorithm on a case study that includes 20 prefab products. We find that different cargo holds carry prefab products that have quite different densities. Moreover, the orientations of many prefab products are different from their default orientations. The results demonstrate the applicability of the proposed model and algorithm.

scholarly journals Suppression of Soil Dust Emissions from Large-Scale Construction Sites Using Starch and Polyvinyl Alcohol

2019 ◽  
Vol 8 (2) ◽  
pp. 38-46
Author(s):  
Jong-Soo Choi ◽  
Dong-Su Kim ◽  
Yu-Lim Choi ◽  
Lakshmi Prasanna Lingamdinne ◽  
Janardhan Reddy Koduru ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Urban Areas ◽  
Large Scale ◽  
Dust Emission ◽  
Aggregate Stability ◽  
Scale Construction ◽  
Soil Dust ◽  
Construction Sites ◽  
Limit Values ◽  
Dust Emissions

Soil dust emitted from large-scale construction sites in urban areas impacts air quality and creates a severe health threat to residents. Water spraying is commonly practiced to lower dust emission in construction sites, but its long-term effectiveness is questionable. In this study the utility of starch, polyvinyl alcohol (PVA), and a blend of starch and PVA in various proportions was investigated for the suppression of soil dust emissions at construction sites in Seoul. The efficiency of each dust suppressant was tested with test soil samples in a laboratory-scale wind tunnel box under different concentrations of suppressants and soil textures. Starch and PVA showed superior ability to suppress soil dust emissions compared to moistening bare soil, resulting in PM10 lower than the daily limit values of 30 μg/m3. PVA showed higher soil dust suppression capability for all conditions over starch. Test soils sprayed with dust suppressants significantly improved aggregate stability compared to untreated soils.

scholarly journals Introducing a multi-criteria evaluation method using Pythagorean fuzzy sets

Kybernetes ◽  
2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Vahid Mohagheghi ◽  
Seyed Meysam Mousavi ◽  
Mohammad Mojtahedi ◽  
Sidney Newton
Keyword(s):  
Decision Making ◽  
Fuzzy Sets ◽  
Large Scale ◽  
Project Selection ◽  
Scale Construction ◽  
Multi Criteria Decision Making ◽  
Content Type ◽  
Pythagorean Fuzzy Sets ◽  
Multi Criteria Evaluation

Purpose Project selection is a critical decision for any organization seeking to commission a large-scale construction project. Project selection is a complex multi-criteria decision-making problem with significant uncertainty and high risks. Fuzzy set theory has been used to address various aspects of project uncertainty, but with key practical limitations. This study aims to develop and apply a novel Pythagorean fuzzy sets (PFSs) approach that overcomes these key limitations. Design/methodology/approach The study is particular to complex project selection in the context of increasing interest in resilience as a key project selection criterion. Project resilience is proposed and considered in the specific situation of a large-scale construction project selection case study. The case study develops and applies a PFS approach to manage project uncertainty. The case study is presented to demonstrate how PFS is applied to a practical problem of realistic complexity. Working through the case study highlights some of the key benefits of the PFS approach for practicing project managers and decision-makers in general. Findings The PFSs approach proposed in this study is shown to be scalable, efficient, generalizable and practical. The results confirm that the inclusion of last aggregation and last defuzzification avoids the potentially critical information loss and relative lack of transparency. Most especially, the developed PFS is able to accommodate and manage domain expert expressions of uncertainty that are realistic and practical. Originality/value The main novelty of this study is to address project resilience in the form of multi-criteria evaluation and decision-making under PFS uncertainty. The approach is defined mathematically and presented as a six-step approach to decision-making. The PFS approach is given to allow multiple domain experts to focus more clearly on accurate expressions of their agreement and disagreement. PFS is shown to be an important new direction in practical multi-criteria decision-making methods for the project management practitioner.

scholarly journals Diagnosis Index System Setup for Implementation Status Management in Large-Scale Construction Projects

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Wan-Yu Wang ◽  
Yi Wang
Keyword(s):  
Rough Set ◽  
Index System ◽  
Construction Projects ◽  
Large Scale ◽  
Mathematic Model ◽  
Scale Construction ◽  
The Index System ◽  
Set Up ◽  
Implementation Status

In order to scientifically set up the diagnosis index system for the implementation state of large-scale construction projects, this paper proposed a new method which takes into account the indicators in all level states. Different from the index system constructed by other methods, the indexes/indicators established in this paper are more systematically correlated, with a better hierarchical progression in all levels of the index system. The particular diagnosis index parameters of the management objects are firstly analysed through the mathematic model based on the Rough Set. Then, the representation of the periodical management problems is taken as the study object, and the detailed establishing process to form the index system is presented based on the evidenced theory and the Rough Set extraction. Finally, a case study is presented to validate the proposed method. It is shown that the index system set up by the proposed method can not only represent the systematic hierarchical relationships among all corresponding indexes but also diagnose the macroscopic, the mesostates, and the microstates effectively.

Large-Scale Construction Equipment Joint Simulation Based on Multi-Body Dynamics Theory

2011 ◽  
Vol 268-270 ◽  
pp. 101-105 ◽  
Author(s):  
Yu Hong Li ◽  
Ling Xiao Nie ◽  
Shan Ding
Keyword(s):  
Large Scale ◽  
Scale Construction ◽  
Construction Equipment ◽  
Joint Simulation ◽  
Simulation Based ◽  
Body Dynamics ◽  
Engineering Practices ◽  
Multi Body ◽  
The Given

In order to ensure the efficiency and safety of construction process control and failure analysis for the large-scale construction equipment in water conservancy engineering, which is based on specified equipment for some real engineering practices, namely TC2400-tower belt crane, a multi-body joint simulation dynamical model is given in this paper. Then, the data flow and operational process of the model are analyzed. Finally, a case study based on ADAMS and SOLIDWORKS platforms is performed to verify the validity and rationality of the given model.

Research on Rural Planning Strategies Based on the Coordination with the Development of Large-Scale Construction Projects - A Case Study on Yanqing County in Beijing

2013 ◽  
Vol 357-360 ◽  
pp. 1882-1885 ◽  
Author(s):  
Qing Yuan ◽  
Ji Guang Zhao ◽  
Yan Yan Xia
Keyword(s):  
Rural Areas ◽  
Construction Projects ◽  
Large Scale ◽  
Scale Construction ◽  
County Level ◽  
Rural Planning ◽  
Coordinated Development ◽  
Planning Strategies

With the increase of construction in rural areas, the research on the coordinated development between large construction projects and the new rural planning has become a significant subject. Taking the rural planning in Beijing Yanqing County as an example, this paper analyzes the interactions which are between rural planning and large-scale construction projects and the current problems. On this basis, the paper proposes objectives and strategies of the rural planning based on the impacts of different large-scale construction projects, which are in order to achieve the coordinated development of rural planning and large-scale construction projects at county level.

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