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Dr. Jarosław Malara
Faculty of Civil Engineering, Cracow University of Technology, 31-155 Kraków, Poland

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Research Keywords & Expertise

0 Construction industry
0 Labor productivity of construction workers
0 Defects in construction
0 Warranty and guarantee in construction
0 Procedure for the acceptance of construction

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Journal article
Published: 03 September 2020 in Applied Sciences
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The aim of the article is to present the results of preliminary research of the defects in residential buildings occurring during the warranty period. Due to the small amount of data, the research results cannot be generalized but allow for the formulation of research hypotheses that will be verified in future studies. The data collected included reports of defects in three multifamily residential buildings constructed by the developer in one of the big cities in Poland, which were then examined. For the examination of defects, statistical analysis was used, which revealed that more than half of the reports contained reasonable defects. The results of the preliminary research also indicate that, on the one hand, owners are very active in making warranty claims in the first three months from the date of commissioning, and, on the other hand, with time, the percentage of reasonable defects increases. In terms of the significance of defects, the largest percentage was significant defects. The results showed little activity on the part of property managers in the initial phase of the operation of the buildings, which is the opposite of that of apartment owners. Reports of faults in windows and door joinery, moisture, scratches on walls, and in the area of balconies and terraces are characterized by a relatively low number of cases reported in the first half of the year after the building is commissioned and a gradual increase in the subsequent warranty period. On the other hand, reports related to electrical installation defects are most frequent in the initial period of the warranty, but, with time, their number decreases.

ACS Style

Edyta Plebankiewicz; Jarosław Malara. Analysis of Defects in Residential Buildings Reported during the Warranty Period. Applied Sciences 2020, 10, 6123 .

AMA Style

Edyta Plebankiewicz, Jarosław Malara. Analysis of Defects in Residential Buildings Reported during the Warranty Period. Applied Sciences. 2020; 10 (17):6123.

Chicago/Turabian Style

Edyta Plebankiewicz; Jarosław Malara. 2020. "Analysis of Defects in Residential Buildings Reported during the Warranty Period." Applied Sciences 10, no. 17: 6123.

Journal article
Published: 26 November 2019 in Buildings
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The aim of this study is to build a mathematical model of the productivity of construction workers. It does so by selecting 17 factors that influence the productivity of construction workers and categorising them into five groups. For the mathematical description of the factors, fuzzy logic was used. A formula for calculating the work productivity of construction workers is proposed. The novelty of the approach proposed by the authors is rooted in the consideration of various factors that have the potential to influence the productivity of construction workers. To present the way the formula operates, a single assessment of ceiling formwork was undertaken. The verification of a model confirmed its capability of analyzing, evaluating, and predicting the productivity of construction workers with satisfying accuracy.

ACS Style

Jarosław Malara; Edyta Plebankiewicz; Michał Juszczyk. Formula for Determining the Construction Workers Productivity Including Environmental Factors. Buildings 2019, 9, 240 .

AMA Style

Jarosław Malara, Edyta Plebankiewicz, Michał Juszczyk. Formula for Determining the Construction Workers Productivity Including Environmental Factors. Buildings. 2019; 9 (12):240.

Chicago/Turabian Style

Jarosław Malara; Edyta Plebankiewicz; Michał Juszczyk. 2019. "Formula for Determining the Construction Workers Productivity Including Environmental Factors." Buildings 9, no. 12: 240.