Formula for Determining the Construction Workers Productivity Including Environmental Factors

Malara, Jarosław; Plebankiewicz, Edyta; Juszczyk, Michał

doi:10.3390/buildings9120240

Cited by 15 publications

(5 citation statements)

References 36 publications

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“…Formwork labour productivity and formwork labour cost are partially affected by local conditions [101]. For instance, labour productivity of formwork related activities may be affected by weather conditions [103]. Hence positive and significant indirect effects of local conditions on both cost (β = 0.243, p < 0.001) and performance indicators (β = 0.262, p < 0.001) have been validated through the SEM approach.…”

Section: Discussionmentioning

confidence: 99%

Formwork System Selection Criteria for Building Construction Projects: A Structural Equation Modelling Approach

2022

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Selecting the appropriate formwork system (FWS) is a critical aspect in the successful completion of reinforced concrete (RC) building construction projects. The selected FWS has a significant impact on the cost, time, and quality performances of the project. As there are many FWSs and formwork fabricators (FWFs) available, the selection of the FWS depends on several compromising and conflicting criteria. This study aims to identify the FWS selection criteria groupings (e.g., latent factors) and investigate the quantitative interrelationships among them. For this purpose, 35 FWS selection criteria were identified through literature review, and a questionnaire was developed. The data from the questionnaire were statistically analyzed, and five latent factors were identified: FWS-FWF characteristics, structural design, local conditions, cost, and performance indicators. A conceptual framework was developed based on the latent factors, and a structural equation modelling (SEM) approach was utilized to identify the effects among the latent factors. The results of the SEM approach confirmed that FWS-FWF characteristics are affected by the structural design and local conditions and FWS-FWF characteristics have a substantial effect on cost and the performance indicators of the project. The findings of this study may assist construction professionals in selecting the FWS in building construction projects.

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Section: Discussionmentioning

confidence: 99%

Formwork System Selection Criteria for Building Construction Projects: A Structural Equation Modelling Approach

2022

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“…An important trend in research is the development of models that can predict labour efficiency, productivity, or performance using various mathematical methods. Fuzzy logic, presented in [25], is believed to aid in the determination of construction workers' productivity. A regression model that explains the dependencies between identified factors and construction workers' labour productivity in Vietnam is presented in [26].…”

Section: Background and State-of-the-artmentioning

confidence: 99%

Construction Work Efficiency Analysis—Application of Probabilistic Approach and Machine Learning for Formworks Assembly

Juszczyk

2023

Applied Sciences

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Analyses of efficiency are vital for planning and monitoring the duration and costs of construction works, as well as the entire construction project. This paper introduces a combined quantitative (probabilistic) and qualitative (machine learning-based) approach to the problem. The proposed approach covers probabilistic analysis based on fitting a triangular distribution to empirical data, followed by the application of support vector machines (SVM). Following the theoretical assumptions, the paper also presents an application of the proposed approach for formwork assembly as an exemplary construction work. This is based on real-life data, including conditions, characteristics, and features of formwork assembly work recorded on a construction site. As a result of the study, triangular distributions were fitted to data representing efficiencies of formwork assembly for three different types of structural members made of reinforced concrete. The parameters (a—minimum, m—peak and b—maximum values of efficiency measured as square meters of an assembled formwork per hour) of the fitted distributions for the particular real-life data were as follows: for columns a = 0.100, m = 1.450, b = 1.900, for walls a = 0.700, m = 1.995, b = 3.300 and for slabs a = 0.200, m = 2.125, b = 3.200. The obtained distributions allow us to assess the probability of achieving efficiency not less than a certain assumed critical value. The study also developed two SVM models—the first based on so-called C-classification and the second based on ν-classification—capable of recognising with satisfactory accuracy whether the efficiency of formworks assembly works for certain conditions, characteristics, and features of works are above or below median values computed based on previously fitted distributions. The performance of both developed models in terms of proper classification, either for training or testing, was above 80%.

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“…After this step and installation, another important task before pouring the concrete in terms of static performance and construction is to check the position and dimensions of the formwork and reinforcements. Formwork is a significant cost factor in reinforced-concrete construction [25][26][27]. Therefore, his proposal is a feedback judgment also with the management of the costs of a construction project, which leads to the need to use information technology enabling a new connection in the design and budgeting of buildings [28,29].…”

Section: Formwork and Designing In Adaptive Architecturementioning

confidence: 99%

Adaptive Design of Formworks for Building Renovation Considering the Sustainability of Construction in BIM Environment—Case Study

et al. 2021

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Progressive technologies and practices are shifting the possibilities of building design and improving work efficiency. Constantly changing site conditions require different procedures and designs that take into account these changing conditions, whether it is a design solution, a change in environmental conditions, or just sustainability factors. Adaptive building design offers opportunities to cope with changing factors to achieve the ähighest possible level of building quality. This case study deals with the topic of adaptive formwork design for building renovation, taking into account sustainability. The aim of the article is an investigation and demonstration of the building information modeling (BIM) environment used for the adaptive design of formwork elements for the building renovation in the context of sustainability. The object of the case study is a building in the center of Kosice, Slovakia. The BIM environment allows prompt and correct adaptation of the formwork design to changing lighting conditions, ventilation, heating and temperature during the design of the building.

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Formula for Determining the Construction Workers Productivity Including Environmental Factors

Cited by 15 publications

References 36 publications

Formwork System Selection Criteria for Building Construction Projects: A Structural Equation Modelling Approach

Formwork System Selection Criteria for Building Construction Projects: A Structural Equation Modelling Approach

Construction Work Efficiency Analysis—Application of Probabilistic Approach and Machine Learning for Formworks Assembly

Adaptive Design of Formworks for Building Renovation Considering the Sustainability of Construction in BIM Environment—Case Study

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