Best Fit of Cumulative Cost Curves at the Planning and Performed Stages of Construction Projects

Szóstak, Mariusz

doi:10.3390/buildings13010013

Cited by 6 publications

(3 citation statements)

References 48 publications

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“…It should be noted that the use of a polynomial trend, e.g. 6 degrees, although allowing one to obtain a high value of the correlation coefficient and a low value of the coefficient of variation, but its practical application can be difficult and complicated for decision makers and can be considered inappropriate [64]. From the practical point of view, the use of polynomials of higher degree than 4 may be difficult for investors, works contractors.…”

Section: Discussionmentioning

confidence: 99%

Forecasting the Course of Cumulative Cost Curves for Different Construction Projects

SZÓSTAK

2023

Civil and Environmental Engineering Reports

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Planning the course of cumulative cost curves and effectively monitoring the implementation process and the incurred financial outlays are still significant problems in the management of construction projects. This is particularly noticeable during the execution phase of construction works. Therefore, it is worthwhile to correctly determine the shape of the cost curve before starting this stage and to periodically examine its fitting to the scheduled course of the budgeted cost curve, the envelope of cost curves characterised by the best-fit curve. There are many methods of forecasting and estimating the costs of construction works, but they are very often complicated and require the decision-maker to use and elaborate mathematical tools. The aim of the research was to determine the shape and course of the cost curves for selected construction projects. Based on the analysis of the collected data on investment projects in 3 facilities research groups (collective housing, hotels and retail service facilities), an original attempt was made to determine the best fit curve and the area of the curve, which in turn indicates the limits of the correct planning of the cumulative costs of construction projects. The Three Sigma rule was applied, correlations and determinants were determined, and the area of the cost curves was described with a third degree polynomial. The conducted research showed that: 1. the optimal formula for determining the best-fit curve, which allow to determine the cost and time of construction works, is a 3-degree polynomial; 2. cost curves, within a certain bounding box, determine the area of the most likely cash flow; 3. when planning the course of a cost curve, it is advisable to use the bounding box of cost curves rather than a single, model, theoretical, or empirical mathematical expression describing the cost curve.

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Section: Discussionmentioning

confidence: 99%

Forecasting the Course of Cumulative Cost Curves for Different Construction Projects

SZÓSTAK

2023

Civil and Environmental Engineering Reports

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“…BIM itself is one of the many technologies, along with CAD (Computer Aided Design), GIS (Geographic Information System), LiDAR (Light Detection and Ranging) or AI (Artificial Intelligence), that are applied in the course of study. These technologies are used in a wide range of activities by urban planners, e.g., in the development of maps [25], variants [26], analyses [27], simulations [28] or designs [29]. BIM can be considered from two perspectives-a broader and a narrower one.…”

Section: Introductionmentioning

confidence: 99%

A Blended Approach to Inquiry-Based Learning Using the Example of the Interdisciplinary Course of BIM in Spatial Management Studies: A Perspective of Students and Professor

Borkowski

2024

Education Sciences

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Inquiry-based learning (IBL) is one of the most effective teaching methods to follow the trend of constructivism. Its main premise is the dominant role of the cognitively activated student, who, like the researcher, has the opportunity to pose questions, test hypotheses and solve problems by using a wide range of tools and techniques. The output of the IBL method is usually a presentation or a piece of work. In the experiment carried out, the IBL method was used during the interdisciplinary course “Building Information Modelling (BIM)”, taught at the master’s degree programme majoring in spatial management at the Warsaw University of Technology. The aim of the class was to solve a specific problem and develop a scientific and technical manuscript, which at the same time could form the basis of a scientific publication. The class was first experimentally implemented with a mixed-methods approach based mainly on IBL. Students were introduced to IBL techniques and tools as part of a project exercise, then were presented with problem and research topics. Participants in the classes chose an issue from those presented or created a topic of interest themselves. Peer learning, Montessori silent lessons or supervision were used during the implementation of the activities. Students were not assessed digitally, but their activity was marked in the form of pluses (+) and the focus was on providing quick and complete feedback (always individually to the individual or group). The class concluded with a self-assessment and a research questionnaire, which concluded that an authoritative teaching process was a far better choice than an authoritarian or liberal process.

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“…Construction projects are fundamental to the advancement and economic progress of nations worldwide [4,5]. The evaluation of a project's success is commonly based on various critical factors, such as cost, quality, safety, and time [6,7]. Nevertheless, the CI is intrinsically burdened with the potential for unintended fatalities, resulting in a multitude of safety incidents involving workers and professionals [2,8].…”

Section: Introductionmentioning

confidence: 99%

Safety Leadership: A Catalyst for Positive Safety Climate on Construction Sites

Sankar,

Anandh,

Prasanna

2024

Buildings

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Limited research exists on safety leadership and safety climate in developing countries, despite their established importance in the construction industry. This study addresses this gap by investigating how immediate superiors’ safety leadership behaviours influence safety climate perceptions among construction professionals in southern India. Using a quantitative approach, the study collected valid questionnaire surveys among 279 construction professionals by convenience sampling across various construction sites. The survey revealed that safety leadership significantly and positively predicts five key safety climate factors: management’s commitment to safety, safety equipment and procedures, safety training, communication and openness, and group dynamics and safety culture. These findings highlight the critical role immediate superiors play in shaping safety climate perceptions through their commitment, communication, and employee involvement. This research underscores the importance of investing in safety leadership development to improve safety outcomes, reduce accidents and injuries, and enhance regulatory compliance within the Indian construction industry.

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Best Fit of Cumulative Cost Curves at the Planning and Performed Stages of Construction Projects

Cited by 6 publications

References 48 publications

Forecasting the Course of Cumulative Cost Curves for Different Construction Projects

Forecasting the Course of Cumulative Cost Curves for Different Construction Projects

A Blended Approach to Inquiry-Based Learning Using the Example of the Interdisciplinary Course of BIM in Spatial Management Studies: A Perspective of Students and Professor

Safety Leadership: A Catalyst for Positive Safety Climate on Construction Sites

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