Quantification of Spatial Temporal Congestion in Four-Dimensional Computer-Aided Design

Chua, David K. H.; Yeoh, K. W.; Yang, Song

doi:10.1061/(asce)co.1943-7862.0000166

Cited by 33 publications

(17 citation statements)

References 15 publications

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“…The formalized constraint (5) is quite similar to the model discussed in (Chua et al, 2010), while the form (6) is more close to the criteria presented in (Chavada et al, 2012). Indeed, if three activities A 1 , A 2 , A 3 utilise the same resource r in the same workspace w throughout the same duration with respective Main disadvantage of the reduced representation (6) compared with the general form (5) is that even a short time overlay of the workspaces with relatively high utilisation factors may lead to a breach of the congestion conditions although unlikely that such workspace conflicts could not be resolved in practice.…”

Section: Workpace Congestion Conditionssupporting

confidence: 54%

Effective Project Scheduling Under Workspace Congestion and Workflow Disturbance Factors

Semenov

Anichkin

Морозов

et al. 2014

AJCEB-Conerence Series

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Effective project management implies the use of advanced planning and scheduling methods that allow to determine feasible sequences of activities and to complete a project on time and on budget. Traditional scheduling tools like fundamental Critical Path Method (CPM) and various methods for Resource Constrained Project Scheduling Problem (RCPSP) and Time Constrained Project Scheduling Problem (TCPSP) have many shortcomings for construction projects where spatial factor plays a critically important role. Previous attempts to interpret space as a specific resource were successful for particular problems of line-of-balance scheduling, space scheduling, dynamic layout planning, horizontal and vertical logic scheduling, workspace congestion mitigating, scheduling multiple projects with movable resources, spatial scheduling of repeated and grouped activities and motion planning. However, none of these methods considers the spatiotemporal requirements in a holistic framework of generic RCPSP problem and provides feasible results accounting for workspace and workflow factors. In this paper we start with the classical RCPSP statement and then present mathematically strong formalisation of the extended generalised problem, taking into account workspace congestion and workflow disturbance constraints specified in practically meaningful and computationally constructive ways. For the generalised RCPSP problem an effective scheduling method is proposed. The method tends to minimise the project makespan while satisfying timing constraints and precedence relations, not exceeding resource utilisation limits, avoiding workspace congestions and keeping workflows continuous. The method reuses so-called serial scheduling scheme and provides for additional computational routines and heuristic priority rules to generate feasible schedules satisfying all the imposed requirements. Advantages of the method and prospects for its application to industrial needs are outlined in the paper too.

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Section: Workpace Congestion Conditionssupporting

confidence: 54%

Effective Project Scheduling Under Workspace Congestion and Workflow Disturbance Factors

Semenov

Anichkin

Морозов

et al. 2014

AJCEB-Conerence Series

View full text Add to dashboard Cite

show abstract

“…La congestión espacial temporal es posible cuantificarla en base a los indicadores DSI, que mide el riesgo en un trabajo local y entrega soluciones locales; y el CPI que permite tomar una ventaja de tiempo cualquiera para evaluar, analizar y comparar la acumulación de des-utilidad de cada entidad espacial (Chua et al, 2010).…”

Section: Riesgosunclassified

Uso e Impacto de los Modelos nD como Herramienta para la Dirección de Proyectos en la Industria de la Arquitectura, Ingeniería y Construcción

et al. 2017

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ResumenEl principal objetivo de esta investigación es presentar evidencia del uso e impacto de modelos nD como herramienta para la dirección de proyectos en la industria de la arquitectura, la ingeniería y la construcción, para lo cual se ha realizado una revisión bibliográfica sobre el tema. La industria de la arquitectura, ingeniería y construcción ha sufrido cambios, innovaciones y avances en pos de optimizar proyectos pertenecientes al rubro. En este contexto, las tecnologías de información se han ido incorporando al desarrollo de este tipo de obras. Sin embargo, se desconoce el uso e impacto real que estas herramientas entregan en cada una de las áreas de conocimiento en la dirección de proyectos. Dentro de los resultados principales se tiene que al implementar estos modelos se produce un impacto directo e indirecto en la gran mayoría de los procesos de dirección de proyectos y con mayor énfasis en las áreas tiempo, costos e clientes. Palabras clave: modelos nD, dirección de proyectos, industria AIC, costos de proyectos Use and Impact of nD Models as a Tool for Project Management in the Architecture, Engineering and Construction Industry AbstractThe main objective of this research is to present evidence on the use and impact of nD models as a tool for project management in the architecture, engineering and construction industry, for which a bibliographic review on the subject has been carried out. The architecture, engineering and construction industry has undergone changes, innovations and advances to optimize projects belonging to the field. In this context, information technologies have been incorporated into the development of this type of works. However, the use and real impact that these tools contribute to each of the areas of knowledge in project management is unknown. Among the main results, the implementation of these models has a direct e indirect impact on the great majority of project management processes, with a greater emphasis on time, cost and stakeholders.

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“…Present methods rely on visualisation of changes to construction sequences using 4D CAD, which relies on the experience of Planners to elicit conflicts. The indicators developed by Chua, et al (2010) complements this visualisation aspect of 4D CAD, by allowing the construction sequencing and its corresponding activities to be identified and subsequently analysed quantitatively.…”

Section: Representing Spatial Temporal Utilization In Workpacesmentioning

confidence: 99%

“…Despite the availability of the above methodologies, quantification methodologies for workspace conflict detection are limited, and this lack results in a lack of resolution frameworks for workspace congestion issues. Chua, et al (2010) provided such a quantification method for capturing workspace congestions from a 4D CAD model of worksite operations. The value of the quantification method lies in allowing Planners to decide on an optimal schedule to reduce dynamic workspace conflicts, hence reducing the risk of schedule overrun arising from workspace clashes.…”

Section: Introduction and Background Literaturementioning

confidence: 99%

“…The value of the quantification method lies in allowing Planners to decide on an optimal schedule to reduce dynamic workspace conflicts, hence reducing the risk of schedule overrun arising from workspace clashes. This paper presents a resolution framework based on the quantification method introduced by Chua, et al (2010). A suitable chromosome representation is proposed within the framework to enhance the efficiency of the algorithm.…”

Section: Introduction and Background Literaturementioning

confidence: 99%

See 1 more Smart Citation

Mitigating Workspace Congestion: A Genetic Algorithm Approach

Yeoh¹,

H²

2012

Proceedings of the 2012 (3rd) International Conference on Engineering, Project, and Production Management

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Workspace Planning and Management is a critical component in the design and planning process to achieve efficiency and effectiveness in construction. Early identification of problems relating to workspace clashes has been shown to be a vital component of constructability analysis. However, there is a lack of quantification methodologies to identify and subsequently resolve such workspace congestion issues. This paper extends the quantification methodology previously proposed by the authors, by further introducing a heuristic genetic algorithm for resolving such workspace congestion issues via schedule repair, which may be modelled as an optimization problem. The novelty of the chromosome design allows the genetic algorithm to direct its search within the feasible search space. An oil refinery refurbishment case study is used to show the applicability of the proposed framework for minimizing congestion. In the case study, schedule repair of the original construction programme is carried out to minimize workspace clashes. The genetic algorithm proposed is demonstrated to temporally arrange the activities in the schedule, hence reducing the schedule clashes between overlapping activities. This achieves a more constructible programme with respect to workspace congestion.

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Quantification of Spatial Temporal Congestion in Four-Dimensional Computer-Aided Design

Cited by 33 publications

References 15 publications

Effective Project Scheduling Under Workspace Congestion and Workflow Disturbance Factors

Effective Project Scheduling Under Workspace Congestion and Workflow Disturbance Factors

Uso e Impacto de los Modelos nD como Herramienta para la Dirección de Proyectos en la Industria de la Arquitectura, Ingeniería y Construcción

Mitigating Workspace Congestion: A Genetic Algorithm Approach

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