scholarly journals Reviewing Construction Schedule Float Management

2017 ◽  
Vol 11 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Jyh-Bin Yang
Keyword(s):  
Construction Projects ◽  
Critical Path ◽  
Management Systems ◽  
Knowledge Level ◽  
Schedule Control ◽  
Incorrect Decision ◽  
Schedule Management ◽  
Professional Project ◽  
Construction Schedule

As the complexity in construction projects increased, simply managing the obtained float values and critical path(s) by the CPM method usually results in more difficult schedule control and, consequently, in incorrect decision making due to non-realistic float values. This study thoroughly reviewed various float types in the literature and professional project management systems, and discussed five managerial essentials and three proactive strategies on mitigating challenging float-related problems based on the perspective of managing schedules by controlling floats. With some comments and suggestions, the outcomes of this study not only improve the knowledge level on schedule management but also provide a better understanding of float management to improve the quality of schedule management.

Risk Management of Construction Schedule by PERT with Monte Carlo Simulation

2014 ◽  
Vol 548-549 ◽  
pp. 1646-1650 ◽  
Author(s):  
Yang Liu ◽  
Yan Li
Keyword(s):  
Sensitivity Analysis ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Critical Path ◽  
Total Duration ◽  
Control Points ◽  
Schedule Management ◽  
Simulation Results ◽  
Critical Paths ◽  
Construction Schedule

It has been proved that the construction schedule management was an uncertain problem. Traditional CPM method was a good way to define the total duration and critical paths but can not solve uncertainty. The paper use CPM to define the duration and critical path firstly, then defined the parameters with Delphi and make Monte Carlo simulation. Through simulation results, it is found that the probability to finish the work on time was only 35.3%. The following step is to make sensitivity analysis, through the calculation, the work which has large influence was found and treat as key control points. It is proved that Monte Carlo simulation is useful to solve the problem of construction schedule management.

scholarly journals TIME REDUCTION EFFECT OF THE ENHANCED TACT METHOD FOR HIGH-RISE RESIDENTIAL BUILDINGS

2015 ◽  
Vol 22 (7) ◽  
pp. 944-953 ◽  
Author(s):  
Donghoon LEE ◽  
Dong-Sub KIM ◽  
Gwang-Hee KIM ◽  
Sunkuk KIM
Keyword(s):  
Construction Projects ◽  
Critical Path ◽  
Residential Buildings ◽  
Residential Building ◽  
Building Projects ◽  
Schedule Management ◽  
High Rise ◽  
Time Reduction ◽  
Reduction Effect ◽  
Line Of Balance

The finish work on high-rise residential buildings is performed simultaneously with mechanical and electrical construction work, which results in frequent work interference and delay. This significantly hinders efficient schedule management. Critical Path Method (CPM) is inefficient when applied to high-rise residential building projects in which work is repeatedly carried out for each floor. Line-of-Balance (LOB) is widely used for its effectiveness in managing repetitive work. LOB was developed into TACT and eTACT (enhanced-TACT) to combine heterogeneous works con­tinuously. In particular, the eTACT schedule management method has an advantage in that it is capable of systemati­cally connecting detailed construction, mechanical and electrical construction projects using a work planning template. This study evaluates the time reduction effect of the eTACT method for a high-rise residential building. A comparative analysis of data on 102 cases of non-applied projects and 44 cases of projects using the eTACT method over a period of 10 years is presented to verify its effectiveness. The result shows that finish work time was reduced by 25% or about 53 days on average.

Study on Schedule Control in AP1000 Nuclear Plant Project

2010 ◽  
Author(s):  
Xiaopeng Fang
Keyword(s):  
Nuclear Power ◽  
Construction Technology ◽  
Construction Project Management ◽  
Modular Construction ◽  
Schedule Control ◽  
Schedule Management ◽  
Construction Techniques ◽  
New Construction ◽  
Construction Schedule ◽  
Parallel Construction

The construction of AP1000 Nuclear Power Plant (NPP) has commenced in China. The AP1000 NPP features a passive design concept and modular construction technology. Based on the management of the construction of current AP1000 NNP, this paper describes the effects on Nuclear Island (NI) construction project management resulting from modular construction technology, as well as new construction techniques and methods. This paper puts forward new requirements for construction schedule management of the nuclear island construction at different levels. The AP1000 NI construction logic features the parallel construction of civil and structural erection as the main approach, with the integrated schedule of module fabrication, assembly and installation as support.

Study on Application of Monte Carlo Simulation in Construction Schedule Management

2013 ◽  
Vol 859 ◽  
pp. 284-288
Author(s):  
Yang Liu ◽  
Yan Li
Keyword(s):  
Sensitivity Analysis ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Critical Path ◽  
Total Duration ◽  
Control Points ◽  
Schedule Management ◽  
Simulation Results ◽  
Critical Paths ◽  
Construction Schedule

It has been proved that the construction schedule management was an uncertain problem. Traditional CPM method was a good way to define the total duration and critical paths but can not solve uncertainty. The paper use CPM to define the duration and critical path firstly, then defined the parameters with Delphi and make Monte Carlo simulation. Through simulation results, it is found that the probability to finish the work on time was only 68%. The following step is to make sensitivity analysis, through the calculation, the work which has large influence was found and treat as key control points. It is proved that Monte Carlo simulation is useful to solve the problem of construction schedule management.

The Introduction and the Calculation of Virtual Expense Ratio in Decision Critical Path Method (DCPM)

2013 ◽  
Vol 860-863 ◽  
pp. 3031-3034
Author(s):  
Jian Xun Qi ◽  
Zhi Nan Kan
Keyword(s):  
Completion Time ◽  
Critical Path ◽  
Management Problem ◽  
Heuristic Rule ◽  
Expense Ratio ◽  
Schedule Management ◽  
Project Completion ◽  
Project Construction ◽  
Construction Schedule ◽  
Power Project

As the particularity of power engineering projects, in order to achieve great economic and social benefits as soon as possible, the owner often add reward or punishment factor on the power project construction schedule management. This paper improved the presentation of decision critical method (DCPM), using a simple arrow to present multi decision of a decision-making activity, similarly as PERT network. This paper introduce the concept of virtual expense ratio of different decisions, on the base of which combined the reward coefficient b and penalty coefficient a as well as the real project completion time T and the target completion time D. A new heuristic rule was proposed, not only takes the cost of different decisions but also considers the relations of real project completion time T and target completion time D. Thus, the new heuristic rule enjoys broader application than previous methods. The new calculation procedure is given, broad the application range of DCPM, and affords an effective new and practical method to help solving power project construction schedule management problem.

Advanced Construction Methods for New Nuclear Power Plants

2010 ◽  
Author(s):  
Dae-Yul Jung ◽  
Yoon-Kee Kang ◽  
Chang-Hyung You
Keyword(s):  
Construction Projects ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Critical Path ◽  
Development Program ◽  
3D Cad ◽  
Cad System ◽  
Construction Methods ◽  
Construction Schedule

This paper covers advanced construction technologies that are generally used for nuclear power plants and presents advanced construction methods that can contribute to an efficient and short construction schedule. The construction schedule is driven by the activities of the critical path. The advanced construction methods consist of Modularization, Improvement of Mechanical Rebar splices, Application of 3D-CAD system for information and control, and the installation of RVI and RCL at the same time. Some methods have been applied in actual Nuclear power projects and others have been developing under the research and development program. It incorporates the experiences and insights from recent nuclear construction projects all over the world.

scholarly journals Research on Visual Management Technology of Tunnel Construction Process Based on BIM Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yue Zhou ◽  
Chuang Wang ◽  
Bingxiang Yuan ◽  
Minjie Chen ◽  
Jianbing Lv
Keyword(s):  
Tunnel Construction ◽  
Construction Process ◽  
Detailed Design ◽  
Construction Engineering ◽  
Schedule Management ◽  
Efficient Management ◽  
Management Technology ◽  
Construction Schedule ◽  
Whole Life Cycle

In order to achieve more efficient management of BIM technology in the field of tunnel construction, this paper took Zhuhai Dahengqinshan No. 1 Tunnel as the project background and studied the visualization management technology of tunnel construction process based on BIM technology. Firstly, we created the 3D geological model and tunnel BIM model by using Revit, 3dsmax, and other software. Secondly, the detailed design was carried out, and there was no gap in the model after the detailed design was checked by ABAQUS software. Then, we checked the problems between disciplines and conducted collision inspection in the model. Finally, we carried out the 4D construction progress simulation to solve the conflict between time and space in the whole life cycle of tunnel construction. The results revealed that the deepening design could optimize the design scheme of tunnel construction engineering. Collision inspection directly exposed problems such as unscientific site layout. 4D construction schedule management could not only realize the visualization of field construction process but also improve the quality of project management compared with traditional means. The research results provide technical experience for the visualization management of tunnel construction.

scholarly journals Research on Examination of Construction Drawings of University Construction Projects

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Wenqiang Dang
Keyword(s):  
Construction Projects ◽  
Preliminary Design ◽  
Detailed Structure ◽  
Schedule Control ◽  
Design Institute ◽  
Key Factor ◽  
Review Mechanism ◽  
Design Depth ◽  
Important Basis

After completing the construction project approval, the universities will entrust a qualified design institute to carry out plan design, preliminary design and construction drawing design. Among them, the construction drawings are used to show the external shape, internal layout, detailed structure, and fixed facilities of the building, and its design depth meets the requirements for guiding construction. Construction drawings are an important basis for universities to compile bills of quantities, launch bidding, and organize construction. They are also a key factor for universities construction projects to achieve quality, investment, and schedule control goals. Therefore, the establishment of a complete construction drawing review mechanism to improve the quality of construction drawings is of great significance to the later project management.

scholarly journals Construction of the 3D Reconstruction System of Building Construction Scene Based on Deep Learning

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Zhou Lu
Keyword(s):  
3D Reconstruction ◽  
Construction Projects ◽  
3D Structure ◽  
3D Models ◽  
Reconstruction Algorithms ◽  
Generative Adversarial Network ◽  
Schedule Management ◽  
Reconstruction Methods ◽  
Low Efficiency ◽  
Construction Schedule

The increasing complexity and enormity of construction projects, as well as the fact that the actual operation of construction schedule management still mainly relies on traditional manual management methods, have led to low efficiency of construction schedule management and caused many construction projects to have cost overruns and legal disputes due to schedule delays. Existing 3D reconstruction algorithms often lead to significant voids, distortions, or blurred parts in the reconstructed 3D models, while the machine learning-based 3D reconstruction algorithms are often only to reconstruct simple separated objects and represent them as 3D boxes. A novel architecture of semisupervised 3D reconstruction algorithm is proposed. The algorithm iteratively improves the quality of the original 3D reconstruction model by training a generative adversarial network model to a converged state. Only the prior observed 2D images are required as weakly supervised samples, without any dependence on prior knowledge of the 3D structure shape or reference observations. Experimental results show that this algorithmic framework has significant advantages over the current state-of-the-art 3D reconstruction methods on the standard 3D reconstruction test set.

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