scholarly journals IFC-Based 4D Construction Management Information Model of Prefabricated Buildings and Its Application in Graph Database

2021 ◽  
Vol 11 (16) ◽  
pp. 7270
Author(s):  
Bin Yang ◽  
Miaosi Dong ◽  
Congjun Wang ◽  
Boda Liu ◽  
Zhichen Wang ◽  
...  
Keyword(s):  
Construction Management ◽  
Critical Path ◽  
Information Model ◽  
Delay Analysis ◽  
Graph Database ◽  
Management Information ◽  
Data Interoperability ◽  
Information Delay ◽  
Construction Schedules ◽  
Schedule Network

Effective data interoperability and schedule analysis play a significant role in improving the management of prefabricated buildings. However, there is a lack of efficient strategies and comprehensive approaches for data interoperability and data-based automated schedule analysis. This paper intends to promote prefabricated buildings’ management by solving these two problems via developing an IFC-based framework consisting of three parts. Firstly, this framework proposed a mechanism to establish an IFC-based 4D construction management information model of prefabricated buildings. Furthermore, a non-relational database—graph database—is introduced to twin this model into a task-centered network to realize the interoperation of construction information among different participants. Finally, graph database-based strategies to update data, automatically analyze construction schedules and visualize the 4D construction management information model are described. The proposed framework is validated in a prefabricated engineering case. In this case, an IFC-based and graph database-based 4D construction management information model is established through IFC standard’s extension. The graph database-based analysis of the model automatically recognizes the engineering case’s critical path information, delay analysis information, and schedule network analysis information. It is illustrated that this framework can successfully establish a unified IFC-based information model of prefabricated buildings’ construction management to prompt effective data interoperability. In addition, the application of this IFC-based information model in graph database can automatically analyze the construction schedules to prevent possible delays in advance. In short, the significance of this paper is to innovatively propose an IFC-based and graph data-based information model to solve the difficulties of ineffective data interoperation and unautomated schedule analysis in prefabricated buildings’ construction management. This study can be the digital foundation of further IFC-based digital twin.

scholarly journals Using XML schemas to structure information models of capital construction facilities

Vestnik MGSU ◽  
2020 ◽  
pp. 1570-1583
Author(s):  
Sergey A. Volkov ◽  
Tatiana V. Khripko
Keyword(s):  
Information System ◽  
Life Cycle ◽  
Information Systems ◽  
Management Information System ◽  
Information Model ◽  
Management Information ◽  
State Information ◽  
Building Information ◽  
Capital Construction ◽  
Urban Planning Management

Introduction. Building Information Modeling (BIM) is an auspicious approach that supports management and exchange of semantically rich 3D models across design disciplines. Recently, BIM has gained widespread acceptance in the AEC industry, and it improves the efficiency and quality of the process by facilitating the early exchange of 3D building models. At different stages of the life cycle, a building information model is gradually refined from rough conceptual design to detailed individual components. The task is to develop mechanisms for machine verification (authentication) of data transmitted to/from different systems (for example, from a customer to an expert evaluation authority, from a contractor to the urban planning management information system or any other state information system) in the form of an information model of capital construction facilities or certain components of an information model. Materials and methods. To substantiate the choice of the language employed to describe machine-readable documents, various use cases of XML schemas were analyzed, including the use of the Google Trends tool. Information systems, implemented in the Russian Federation, were also considered. Most of them use the W3C XML Schema language to describe XSD schemas. Results. A consolidated list of XML schemas, necessary and sufficient to maintain stages of the life cycle of a capital construction facility in terms of interaction with the Urban Planning Management Information System is presented. To ensure interaction between the life cycle participants and state information systems, it is necessary to have the list of XML schemas approved at the federal level. The paper presents matrixes of scenarios for the application of XML schemas in the following coordinates: participants, life cycle stages. Conclusions. XML schemas can be supplemented in respect of various stages of a life cycle of a capital construction faci-lity to be verified with due regard for further methodological approaches and changes in regulatory and technical acts; new approaches and the need for this supplementation must be substantiated.

Predicting the critical path changes using sensitivity analysis: a delay analysis approach

2020 ◽  
Vol 13 (5) ◽  
pp. 1097-1119
Author(s):  
Mohammed Hammad ◽  
Alireza Abbasi ◽  
Ripon K. Chakrabortty ◽  
Michael J. Ryan
Keyword(s):  
Sensitivity Analysis ◽  
Probability Distribution ◽  
Critical Path ◽  
Research Work ◽  
Delay Analysis ◽  
Content Type ◽  
Project Completion ◽  
Analysis Scheme ◽  
Completion Date ◽  
Distribution Type

PurposeThis research presents a framework that allows project managers to predict the next critical paths (CP(s)) and to take extra care when planning and executing those activities that have the potential to cause changes in a project's current CP(s).Design/methodology/approachThe method presented here is based on an assessment of each activity's contribution to the overall schedule variance, which involves assigning a probability distribution function to each activity duration in the project. A sensitivity analysis is also carried out, which forms the basis of identifying which activity most affects the project completion date and therefore will have the greatest effect in changing the CP.FindingsThe authors’ analysis reveals that the most appropriate probability density function (PDF) for the targeted project is the normal distribution. However, the aim of this work is not to determine the most suitable distribution for each activity but rather to study the effect of the activity distribution type on the CP prediction. The results show that the selection of the appropriate probability distribution is very important, since it can impact the CP prediction and estimated project completion date.Originality/valueThis research work proposes a delay analysis scheme which can help the project manager to predict the next CP and to improve performance by identifying which activity is the bottleneck. On the other hand, the simplicity arises from the fact that this method does not require any expensive machines or software to generate results.

СНИЖЕНИЕ ДИФФУЗНОЙ НАГРУЗКИ НА ВОДНЫЕ ОБЪЕКТЫ: ИСХОДНЫЕ ТРЕБОВАНИЯ НА РАЗРАБОТКУ ТЕХНОЛОГИЧЕСКОГО ПРОЦЕССА

2020 ◽  
pp. 10
Author(s):  
I.I. Kontorovitch
Keyword(s):  
Technological Process ◽  
Systematic Approach ◽  
Information Model ◽  
Time Interval ◽  
Management Information ◽  
Systematic Analysis ◽  
Environment Management ◽  
Methodological Basis ◽  
Relationship Of ◽  
The Relationship

Цель исследований сформулировать совокупность требований к разработке системы утилизации диффузного стока с орошаемых земель, которую предлагается рассматривать как технологический процесс, реализуемый в пределах намеченного интервала времени и обеспечивающий с помощью комплекса технический и техно-природных объектов выполнение в необходимом наборе и комбинации следующих операций: транспортирование, аккумуляция, обработка и использование собственно диффузного стока, а также продуктов его обработки. Методологической основой исследований является системный подход в плане взаимосвязи разрабатываемых исходных требований с компонентами технологического процесса, которые выражаются при помощи категорийно-понятийного инварианта. В процессе исследований определены назначение и цели системы утилизации диффузного стока, представлены основные термины, описывающие данный процесс, а также их определения. В результате системного анализа процесса утилизации диффузного стока с орошаемых земель были установлены исходные требования к созданию системы утилизации диффузного стока, включающие девять компонентов технологического процесса, выраженных посредством следующих научных категорий: персонал, ресурсы, среда, управление, информация, модель, время, продукт.The aim of the research is to formulate a set of requirements for the development of a system for utilizing diffuse runoff from irrigated land, which is proposed to be considered as a technological process implemented within the intended time interval and ensuring, using a complex of technical and techno-natural objects, the necessary set and combination of the following operations: transportation, accumulation, processing and use of diffuse runoff itself, as well as its treatment products. The methodological basis of the research is a systematic approach in terms of the relationship of the developed initial requirements with the components of the technological process, which are expressed using the category-conceptual invariant. In the process of research, the purpose and goals of the diffuse drainage disposal system are determined, the basic terms describing this process are presented, as well as their definitions. As a result of a systematic analysis of the process of utilizing diffuse runoff from irrigated lands, the initial requirements were established for the creation of a system for utilizing diffuse runoff, which includes nine components of the technological process expressed through the following scientific categories: personnel, resources, environment, management, information, model, time, product.

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