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Prof. Krzysztof Zima
Cracow University of Technology, Faculty of Civil Engineering, Poland

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Research Keywords & Expertise

0 evaluation of investment efficiency
0 Construction cost estimation
0 Building information modelling technology
0 Design and build and integrated project delivery
0 Activity of developer companies

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Design and build and integrated project delivery
Building information modelling technology

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Journal article
Published: 20 January 2020 in Buildings
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The present paper presents a SWOT analysis, the aim of which is to evaluate the strategic implementation of BIM technology in the construction industry in Poland. The authors created a SWOT matrix presenting strengths, weaknesses, opportunities, and risks associated with the use of BIM. Using literature analyses, own experience, and market reports, all elements of the SWOT matrix are described in detail. Basic indicators characterizing the strategic position of BIM on the Polish construction market are calculated. Finally, the matrix of strategic tasks and actions that should be applied in order to promote and develop BIM in Poland are defined.

ACS Style

Krzysztof Zima; Edyta Plebankiewicz; Damian Wieczorek. A SWOT Analysis of the Use of BIM Technology in the Polish Construction Industry. Buildings 2020, 10, 16 .

AMA Style

Krzysztof Zima, Edyta Plebankiewicz, Damian Wieczorek. A SWOT Analysis of the Use of BIM Technology in the Polish Construction Industry. Buildings. 2020; 10 (1):16.

Chicago/Turabian Style

Krzysztof Zima; Edyta Plebankiewicz; Damian Wieczorek. 2020. "A SWOT Analysis of the Use of BIM Technology in the Polish Construction Industry." Buildings 10, no. 1: 16.

Journal article
Published: 26 December 2019 in Sustainability
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The paper discusses issues related to life cycle costs in construction. Life cycle cost is a key element in the assessment of environmental sustainability in construction and it provides a tool for the economic evaluation of alternative sustainability options exhibiting different capital, operating costs or resource usage. The authors reviewed selected models of estimating life cycle costs in construction, drew attention to the complex mathematical models developed so far, namely those which take into account only financial risks and those which involve the possibility of the influence of other risk factors and described the main assumptions accompanying the original model for estimating the whole life costs of buildings, including: reasons for choosing theory of possibility, division and parametrization of input data. The aim of this paper is to confirm the validity of the model structure assumptions adopted by the authors by comparing the originally selected fuzzy approach to calculating life cycle costs taking into account the risk with the probabilistic approach, as well as indicating the domain in which the probabilistic approach will complement the fuzzy approach chosen by the authors. The paper presents a comparison analysis of two approaches used in the authors’ model, a fuzzy and a probabilistic approach, recommended by the ISO standard 15686-5:2008. The authors used the Oracle Crystall Ball software in their simulations.

ACS Style

Edyta Plebankiewicz; Wiesław Meszek; Krzysztof Zima; Damian Wieczorek. Probabilistic and Fuzzy Approaches for Estimating the Life Cycle Costs of Buildings under Conditions of Exposure to Risk. Sustainability 2019, 12, 226 .

AMA Style

Edyta Plebankiewicz, Wiesław Meszek, Krzysztof Zima, Damian Wieczorek. Probabilistic and Fuzzy Approaches for Estimating the Life Cycle Costs of Buildings under Conditions of Exposure to Risk. Sustainability. 2019; 12 (1):226.

Chicago/Turabian Style

Edyta Plebankiewicz; Wiesław Meszek; Krzysztof Zima; Damian Wieczorek. 2019. "Probabilistic and Fuzzy Approaches for Estimating the Life Cycle Costs of Buildings under Conditions of Exposure to Risk." Sustainability 12, no. 1: 226.

Journal article
Published: 01 December 2019 in Archives of Civil Engineering
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The authors developed the definition of construction defect and fault and construction defect management based on Polish and foreign publications. In order to assist identification of faults and their analysis in the process of home collection, the authors applied the Case Based Reasoning (CBR) method. In the paper, the authors used Case Based Reasoning (CBR) to support acceptance of apartments. The CBR method allows to determine the magnitude of global similarity for the problem under consideration between the new and old case from the Case Base, using weighted sums of local similarities using criteria weights as coefficients. As a result of CBR-based solutions, an Employer’s representative receives information about the type of construction defects that can be expected, their location and significance, occurrence frequency, and estimated repair cost.

ACS Style

K. Zima; S. Biel. The Concept of Method of Detecting and Analyzing Construction Defects in Residential Buildings. Archives of Civil Engineering 2019, 65, 81 -95.

AMA Style

K. Zima, S. Biel. The Concept of Method of Detecting and Analyzing Construction Defects in Residential Buildings. Archives of Civil Engineering. 2019; 65 (4):81-95.

Chicago/Turabian Style

K. Zima; S. Biel. 2019. "The Concept of Method of Detecting and Analyzing Construction Defects in Residential Buildings." Archives of Civil Engineering 65, no. 4: 81-95.

Proceedings article
Published: 24 July 2019 in CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST)
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The article deals with the issues of conducting renovation policy of multi-family buildings made of a large-panel technology. The authors showed a method of estimating the degree of wear of building elements using fuzzy logic. Then, the elements requiring repair were selected and the costs of replacing or reinforcing elements were estimated. On the basis of the elements’ wear and costs of repair, elements intended for renovation were selected.

ACS Style

Krzysztof Zima; Kinga Sup. Planning the renovation policy of multi-family buildings built in large-panel technology with use of fuzzy logic. CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST) 2019, 2116, 180011 .

AMA Style

Krzysztof Zima, Kinga Sup. Planning the renovation policy of multi-family buildings built in large-panel technology with use of fuzzy logic. CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST). 2019; 2116 (1):180011.

Chicago/Turabian Style

Krzysztof Zima; Kinga Sup. 2019. "Planning the renovation policy of multi-family buildings built in large-panel technology with use of fuzzy logic." CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST) 2116, no. 1: 180011.

Journal article
Published: 02 July 2019 in JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
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The paper presents an original approach to construction cost analysis and development of predictive models based on ensembles of artificial neural networks. The research was focused on the application of two alternative approaches of ensemble averaging that allow for combining a number of multilayer perceptron neural networks and developing effective models for cost predictions. The models have been developed for the purpose of forecasting construction costs of sports fields as a specific type of construction objects. The research included simulation and selection of numerous neural networks that became the members of the ensembles. The ensembles included either the networks of different types in terms of their structure and activation functions or the networks of the same type. The research also included practical implementation of the developed models for cost analysis based on a sports field BIM model. This case study examined and confirmed all of the four models’ predictive capabilities and superiority over models based on single networks for the particular problem. Verification including testing and the case study enabled selection of the best ensemble-based model that combined ten networks of different types. The proposed approach is prospective for fast cost analyses and conceptual estimates in construction projects.

ACS Style

Michał Juszczyk; Krzysztof Zima; Wojciech Lelek. FORECASTING OF SPORTS FIELDS CONSTRUCTION COSTS AIDED BY ENSEMBLES OF NEURAL NETWORKS. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 2019, 25, 715 -729.

AMA Style

Michał Juszczyk, Krzysztof Zima, Wojciech Lelek. FORECASTING OF SPORTS FIELDS CONSTRUCTION COSTS AIDED BY ENSEMBLES OF NEURAL NETWORKS. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT. 2019; 25 (7):715-729.

Chicago/Turabian Style

Michał Juszczyk; Krzysztof Zima; Wojciech Lelek. 2019. "FORECASTING OF SPORTS FIELDS CONSTRUCTION COSTS AIDED BY ENSEMBLES OF NEURAL NETWORKS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 25, no. 7: 715-729.

Journal article
Published: 01 June 2019 in Archives of Civil Engineering
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The model for estimating the whole life costs of the building life cycle that allows the quantification of the risk addition lets the investor to compare buildings at the initial stage of planning a construction project in terms of the following economic criteria: life cycle costs (LCC), whole life costs (WLC), life cycle equivalent annual costs (LCEAC) and cost addition for risk (ΔRLCC). The subsequent stages of the model development have been described in numerous publications of the authors, while the aim of this paper is to check the accuracy of the model in the case of changing the parameters that may affect the results of calculations. The scope of the study includes: comparison of the results generated by the model with the solutions obtained in the life cycle net present value method (LCNPV) for time and financial input data, not burdened with the risk effect; the analysis of the variability of results due to changes in input data; analysis of the variability of results as a consequence of changing the sets of membership functions for input data and methods for defuzzification the result.

ACS Style

E. Plebankiewicz; K. Zima; D. Wieczorek. Original Model for Estimating the Whole Life Costs of Buildings and its Verification. Archives of Civil Engineering 2019, 65, 163 -179.

AMA Style

E. Plebankiewicz, K. Zima, D. Wieczorek. Original Model for Estimating the Whole Life Costs of Buildings and its Verification. Archives of Civil Engineering. 2019; 65 (2):163-179.

Chicago/Turabian Style

E. Plebankiewicz; K. Zima; D. Wieczorek. 2019. "Original Model for Estimating the Whole Life Costs of Buildings and its Verification." Archives of Civil Engineering 65, no. 2: 163-179.

Journal article
Published: 26 February 2019 in Open Engineering
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Over time, historic buildings are exposed to various destructive mechanisms brought about by a wide range of damaging factors. Costs and methods of reinforcing their individual components are, among others, an important issue. The term "reinforcement" is linked with the concept of conservation, which stands for the actions taken with the aim of preserving a building. It provides a well-articulated system consisting of activities that lead to the reinforcement of the structure, usability enhancement or to the improvement of its carrying capacity. This article analyses the selection of an appropriate brick pillar reinforcement method, taking into account accepted evaluation criteria.

ACS Style

Katarzyna Kafel; Agnieszka Leśniak; Krzysztof Zima. Multicriteria comparative analysis of pillars strengthening of the historic building. Open Engineering 2019, 9, 18 -25.

AMA Style

Katarzyna Kafel, Agnieszka Leśniak, Krzysztof Zima. Multicriteria comparative analysis of pillars strengthening of the historic building. Open Engineering. 2019; 9 (1):18-25.

Chicago/Turabian Style

Katarzyna Kafel; Agnieszka Leśniak; Krzysztof Zima. 2019. "Multicriteria comparative analysis of pillars strengthening of the historic building." Open Engineering 9, no. 1: 18-25.

Journal article
Published: 17 January 2019 in Technological and Economic Development of Economy
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The paper deals with estimating the life cycle cost and the whole life cost of a building. An original model for estimating the life cycle cost and the whole life cost of a building which allows the quantification of the increase in costs resulting from the incurred and assessed risk is presented. The proposed model consists of two basic parts: module I evaluating the impact of identified risk factors on individual element of the life cycle cost, and module II allowing to assess life cycle cost including the risk factors selected in module I. In module I the model of fuzzy inference of Mamdani was used. The structure of module II is based on the theory of possibilities and fuzzy sets. The operation of the model is presented on the example of an office building.

ACS Style

Damian Wieczorek; Edyta Plebankiewicz; Krzysztof Zima. MODEL ESTIMATION OF THE WHOLE LIFE COST OF A BUILDING WITH RESPECT TO RISK FACTORS. Technological and Economic Development of Economy 2019, 25, 20 -38.

AMA Style

Damian Wieczorek, Edyta Plebankiewicz, Krzysztof Zima. MODEL ESTIMATION OF THE WHOLE LIFE COST OF A BUILDING WITH RESPECT TO RISK FACTORS. Technological and Economic Development of Economy. 2019; 25 (1):20-38.

Chicago/Turabian Style

Damian Wieczorek; Edyta Plebankiewicz; Krzysztof Zima. 2019. "MODEL ESTIMATION OF THE WHOLE LIFE COST OF A BUILDING WITH RESPECT TO RISK FACTORS." Technological and Economic Development of Economy 25, no. 1: 20-38.

Journal article
Published: 16 November 2018 in Symmetry
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This paper proposes the author’s model based on the Fuzzy Analytic Hierarchy Process (FAHP) to improve the efficiency of contractor bidding decisions. The essence of the AHP method is to make pairwise comparisons of available options against all evaluation criteria. The results of these comparisons are recorded in a square matrix in which symmetrical elements are reciprocal. In the expert opinion, a 9-step, bipolar verbal scale was used so that the symmetry of the response was maintained. For contractors from countries where the tendering system is commonly used, the choice of the right tender in which to participate influences their image, financial condition, and their aspiration to succeed. The bid/no bid decision depends on numerous factors associated with the company itself, the environment, and the project concerning the tender. When facing tough competition, contractors search for a solution which increases their chances of winning the tender. The proposed model was based on factors selected by Polish contractors. The original element of the model involves 4 original criteria and 15 sub-criteria for the assessment of investment decision projects to the selection of the most advantageous contract, i.e., the contractor’s participation in the bid. For verbal evaluations describing the criteria, symmetric triangular fuzzy numbers were assigned. The authors performed an extended analysis method combined with FAHP in the model. Fuzzy evaluations underwent elaborate analysis, the aim of which was to specify the synthetic priority weights for each criterion. As a result of the application of the method, to prove that the model works, an example from the Polish construction market was presented in which a bid/no bid decision about four possible tenders was to be taken. Despite the considered example applying to Polish conditions, the proposed model can be used also in other countries. The authors’ rationale is to produce new and more flexible methodologies in order to realistically model a variety of concrete decision problems.

ACS Style

Agnieszka Leśniak; Daniel Kubek; Edyta Plebankiewicz; Krzysztof Zima; Stanisław Belniak. Fuzzy AHP Application for Supporting Contractors’ Bidding Decision. Symmetry 2018, 10, 642 .

AMA Style

Agnieszka Leśniak, Daniel Kubek, Edyta Plebankiewicz, Krzysztof Zima, Stanisław Belniak. Fuzzy AHP Application for Supporting Contractors’ Bidding Decision. Symmetry. 2018; 10 (11):642.

Chicago/Turabian Style

Agnieszka Leśniak; Daniel Kubek; Edyta Plebankiewicz; Krzysztof Zima; Stanisław Belniak. 2018. "Fuzzy AHP Application for Supporting Contractors’ Bidding Decision." Symmetry 10, no. 11: 642.

Conference paper
Published: 03 September 2018 in MATEC Web of Conferences
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The paper deals with the issue of the life cycle cost in the construction. It also focuses on the part of the model for the calculation of the life cycle cost of buildings with consideration of the risk that allows the calculation of the life cycle cost of buildings with different lifetimes. For the construction of this part of the model, the authors used the life cycle equivalent annual cost indicator (LCEAC). The operation of this part of the model was presented on the example of three scenarios of the life cycle of pneumatic sports halls for which the estimated service life of the building (ESLB) was ranged from 19 to 30 years.

ACS Style

Edyta Plebankiewicz; Krzysztof Zima; Damian Wieczorek. Life Cycle Equivalent Annual Cost (LCEAC) as a Comparative Indicator in the Life Cycle Cost Analysis of Buildings with Different Lifetimes. MATEC Web of Conferences 2018, 196, 04079 .

AMA Style

Edyta Plebankiewicz, Krzysztof Zima, Damian Wieczorek. Life Cycle Equivalent Annual Cost (LCEAC) as a Comparative Indicator in the Life Cycle Cost Analysis of Buildings with Different Lifetimes. MATEC Web of Conferences. 2018; 196 ():04079.

Chicago/Turabian Style

Edyta Plebankiewicz; Krzysztof Zima; Damian Wieczorek. 2018. "Life Cycle Equivalent Annual Cost (LCEAC) as a Comparative Indicator in the Life Cycle Cost Analysis of Buildings with Different Lifetimes." MATEC Web of Conferences 196, no. : 04079.

Conference paper
Published: 10 July 2018 in INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017)
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Sports fields can be considered as a type of sport facilities that must be built in the course of a construction project. The paper presents some results of a broader research on the problem of cost predicting for such objects supported by various mathematical tools. The Kohonen’s neural networks (also known as self-organizing map or self-organizing feature maps) are explored for the purpose of clustering data including characteristic parameters of sports fields built in Poland. Kohonen’s neural networks were applied to perform the transformation of n-dimensional input data space into a two dimensional in a map. In the course of the research, the data including characteristic parameters of sports fields was presented to the number of networks that varied in the configuration of an output layer. The two dimensional topologically ordered feature map of data clusters that describe groups of similar sports fields is proposed as a result of the analysis.

ACS Style

Michał Juszczyk; Krzysztof Zima. Clustering of sports fields as specific construction objects aided by Kohonen’s neural networks. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017) 2018, 1978, 240009 .

AMA Style

Michał Juszczyk, Krzysztof Zima. Clustering of sports fields as specific construction objects aided by Kohonen’s neural networks. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017). 2018; 1978 (1):240009.

Chicago/Turabian Style

Michał Juszczyk; Krzysztof Zima. 2018. "Clustering of sports fields as specific construction objects aided by Kohonen’s neural networks." INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017) 1978, no. 1: 240009.

Conference paper
Published: 20 June 2018 in 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation
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ACS Style

Krzysztof Zima. TECHNOLOGICAL AND MATERIAL EVALUATION OF CONSTRUCTION WORKS. 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation 2018, 1 .

AMA Style

Krzysztof Zima. TECHNOLOGICAL AND MATERIAL EVALUATION OF CONSTRUCTION WORKS. 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation. 2018; ():1.

Chicago/Turabian Style

Krzysztof Zima. 2018. "TECHNOLOGICAL AND MATERIAL EVALUATION OF CONSTRUCTION WORKS." 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation , no. : 1.

Journal article
Published: 17 May 2018 in Sustainability
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The idea of sustainable development and the resulting environmentally friendly attitudes are increasingly used in construction projects. Designing in accordance with the principles of sustainable development has an impact on the costs of construction works. The authors of this paper proposed an approach to estimate the costs of sports field construction using the Case Based Reasoning method. In their analysis, they distinguished 16 factors that affect the cost of a construction project and are possible to already be described at an early stage of its preparation. The original elements of the work include: consideration of such environmental factors as the environmental impact of the building, materials used, the impact of the facility on the surroundings affecting the amount of implementation costs and development of own database containing 143 construction projects that are related to sports fields. In order to calculate the similarity of cases, different calculation formulas were applied depending on the type of data (quantitative, qualitative, uncertain, no data). The obtained results confirmed that the CBR method based on historical data and using criteria related to sustainable development may be useful in cost estimation in the initial phase of a construction project. Its application to the calculation of the costs that are related to the implementation of sports fields generates an error of 14%, which is a very good result for initial calculations. In the short run, such factors as the impact of the object and the type of materials that are used from the perspective of their influence on the environment may be decisive as far as the costs determined in the life cycle of the building are concerned, as well as the lowest costs of the building construction ensuring the appropriate quality and respect for the environment.

ACS Style

Agnieszka Leśniak; Krzysztof Zima. Cost Calculation of Construction Projects Including Sustainability Factors Using the Case Based Reasoning (CBR) Method. Sustainability 2018, 10, 1608 .

AMA Style

Agnieszka Leśniak, Krzysztof Zima. Cost Calculation of Construction Projects Including Sustainability Factors Using the Case Based Reasoning (CBR) Method. Sustainability. 2018; 10 (5):1608.

Chicago/Turabian Style

Agnieszka Leśniak; Krzysztof Zima. 2018. "Cost Calculation of Construction Projects Including Sustainability Factors Using the Case Based Reasoning (CBR) Method." Sustainability 10, no. 5: 1608.

Research article
Published: 14 March 2018 in Complexity
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Cost estimates are essential for the success of construction projects. Neural networks, as the tools of artificial intelligence, offer a significant potential in this field. Applying neural networks, however, requires respective studies due to the specifics of different kinds of facilities. This paper presents the proposal of an approach to the estimation of construction costs of sports fields which is based on neural networks. The general applicability of artificial neural networks in the formulated problem with cost estimation is investigated. An applicability of multilayer perceptron networks is confirmed by the results of the initial training of a set of various artificial neural networks. Moreover, one network was tailored for mapping a relationship between the total cost of construction works and the selected cost predictors which are characteristic of sports fields. Its prediction quality and accuracy were assessed positively. The research results legitimatize the proposed approach.

ACS Style

Michał Juszczyk; Agnieszka Leśniak; Krzysztof Zima. ANN Based Approach for Estimation of Construction Costs of Sports Fields. Complexity 2018, 2018, 1 -11.

AMA Style

Michał Juszczyk, Agnieszka Leśniak, Krzysztof Zima. ANN Based Approach for Estimation of Construction Costs of Sports Fields. Complexity. 2018; 2018 ():1-11.

Chicago/Turabian Style

Michał Juszczyk; Agnieszka Leśniak; Krzysztof Zima. 2018. "ANN Based Approach for Estimation of Construction Costs of Sports Fields." Complexity 2018, no. : 1-11.

Preprint
Published: 28 January 2018
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Information regarding the cost of a construction project is available to the investor and project participants in order to determine the subsequent success of a project, given that the information they collect has an impact on the decisions they make. Cost calculations, especially in the initial phase of a project, often generate large errors. This paper presents the new approach based on a combination of the Case Based Reasoning method (CBR) with the originally selected criteria for the description of a construction project (as a result of Pearson correlation coefficient and Spearman's rank correlation coefficient) and Building Information Modeling (BIM) technology. The CBR method fulfils expectations for a simple and fast system supporting the cost estimation process. It does not require any specialist knowledge, so it will be comprehensible to cost estimation practitioners. The BIM-based model gives the opportunity for the calculation of quantity take-offs and enables the use of the information contained in the BIM model in the cost estimation process. In order to prepare the model an appropriate relational database had to be developed. With extensive research, a database of 173 construction projects, including the construction of a sports field, was obtained. There were 14 variables defined originally by authors; however, only 10 (as a result of the correlation analysis) were used for the calculation. Data related to the project were collected in the BIM model. Results estimating the project’s unit price, using the CBR method, were presented and discussed. The Mean Absolute Estimate Error was used to evaluate the model.

ACS Style

Krzysztof Zima; Agnieszka Leśniak. Index Cost Estimation Using Case Based Reasoning Model Based on Macro BIM. 2018, 1 .

AMA Style

Krzysztof Zima, Agnieszka Leśniak. Index Cost Estimation Using Case Based Reasoning Model Based on Macro BIM. . 2018; ():1.

Chicago/Turabian Style

Krzysztof Zima; Agnieszka Leśniak. 2018. "Index Cost Estimation Using Case Based Reasoning Model Based on Macro BIM." , no. : 1.

Journal article
Published: 23 May 2017 in Przegląd Naukowy Inżynieria i Kształtowanie Środowiska
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The aim of the article is to present the possibilities of using BIM in the work of supervision inspector. In the article were analyzed the activities that must performed supervision inspector. Activities are summarized based on studies of contractual clauses in the tender procedures for the investor’s supervision service. Identified activities are divided into those that do not require a support of BIM technology and those in which this assistance is possible to use and can bring quantifiable benefits. Then were presented possibilities and potential benefits of supporting selected activities with use of BIM technology.

ACS Style

Krzysztof Zima. Technologia building information modeling w pracy inspektora nadzoru inwestorskiego. Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 2017, 26, 266 -275.

AMA Style

Krzysztof Zima. Technologia building information modeling w pracy inspektora nadzoru inwestorskiego. Przegląd Naukowy Inżynieria i Kształtowanie Środowiska. 2017; 26 (2):266-275.

Chicago/Turabian Style

Krzysztof Zima. 2017. "Technologia building information modeling w pracy inspektora nadzoru inwestorskiego." Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 26, no. 2: 266-275.

Research paper
Published: 04 April 2017 in International Journal of Civil Engineering
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The study presents a model for the evaluation of construction projects from the point of view of the client (e.g. developer company). The problem lies in choosing the best solution from the point of view of many criteria. The proposed model is based on a multi-criteria comparative analysis using fuzzy logic. The first part of the paper presents a selection of criteria describing the construction project along with their description. The set of attributes describing the analysed object was determined on the basis of the synthesis of specific proposals for the parameters of construction projects. The set of criteria has been divided into two groups: technical, technological and organisational criteria and separately the economic criteria. Then, the number of variables describing the observations was checked using principal component analysis (PCA). Course of action was presented in the event of multiple criteria analysis using the fuzzy set theory. Both the weights and the evaluations of individual criteria were modelled using membership functions due to the fact that when describing a construction project, or the validity of the criteria of describing variables, they are approximate. An analysis of the correlation of selected project criteria was presented. The proposed decision support model of assessing a construction project makes possible to compare various variants based on 11 factors identified. The use of fuzzy logic has enabled more accurate description of the phenomenon analysed when the exact parameters of the project in the planning and preparation stage of the project are not known.

ACS Style

Marcin Gajzler; Krzysztof Zima. Evaluation of Planned Construction Projects Using Fuzzy Logic. International Journal of Civil Engineering 2017, 15, 641 -652.

AMA Style

Marcin Gajzler, Krzysztof Zima. Evaluation of Planned Construction Projects Using Fuzzy Logic. International Journal of Civil Engineering. 2017; 15 (4):641-652.

Chicago/Turabian Style

Marcin Gajzler; Krzysztof Zima. 2017. "Evaluation of Planned Construction Projects Using Fuzzy Logic." International Journal of Civil Engineering 15, no. 4: 641-652.

Conference paper
Published: 01 January 2017 in INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2016)
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The paper presents an example ofcost estimation in the early phase of the project. The fragment of relative database containing solution, descriptions, geometry of construction object and unit cost of sports facilities was shown. The Index Cost Estimate Based BIM method calculationswith use of Case Based Reasoning were presented, too. The article presentslocal and global similarity measurement and example of BIM based quantity takeoff process. The outcome of cost calculations based on CBR method was presented as a final result of calculations.

ACS Style

Krzysztof Zima. Index cost estimate based BIM method - Computational example for sports fields. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2016) 2017, 1 .

AMA Style

Krzysztof Zima. Index cost estimate based BIM method - Computational example for sports fields. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2016). 2017; ():1.

Chicago/Turabian Style

Krzysztof Zima. 2017. "Index cost estimate based BIM method - Computational example for sports fields." INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2016) , no. : 1.

Journal article
Published: 01 January 2017 in Procedia Engineering
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ACS Style

Krzysztof Zima. Impact of information included in the BIM on preparation of Bill of Quantities. Procedia Engineering 2017, 208, 203 -210.

AMA Style

Krzysztof Zima. Impact of information included in the BIM on preparation of Bill of Quantities. Procedia Engineering. 2017; 208 ():203-210.

Chicago/Turabian Style

Krzysztof Zima. 2017. "Impact of information included in the BIM on preparation of Bill of Quantities." Procedia Engineering 208, no. : 203-210.

Conference paper
Published: 17 October 2016 in E3S Web of Conferences
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Alternative energy sources are becoming more serious competition to traditional ways of generating energy. It becomes real integration of eco-energy with ecology, as well as the innovative technologies with low-energy construction. Apart from the cost an important issue are technical parameters of the equipment, durability, ease of installation, etc. The investor therefore is facing with the problem of decision-making to choose the best solution from the point of view of many criteria. In the article, the authors present the proposal to apply the methods of multi-criteria analysis to select the most beneficial variant of the solar system solutions. In this purpose will be use among other method: multivariate analysis of Saaty’s AHP, the taxonomic method of weighting factors and, belonging to a group of methods using outranking relations, the Promethee II method. Proposed comparative analysis can be used as a method for decision support during the selection of the most beneficial technological solution of solar installation and to evaluate operational efficiency existing buildings which will have implemented new systems.

ACS Style

Aleksandra Radziejowska; Krzysztof Zima. Multicriteria analysis in selecting the optimal variant of solar system. E3S Web of Conferences 2016, 10, 78 .

AMA Style

Aleksandra Radziejowska, Krzysztof Zima. Multicriteria analysis in selecting the optimal variant of solar system. E3S Web of Conferences. 2016; 10 ():78.

Chicago/Turabian Style

Aleksandra Radziejowska; Krzysztof Zima. 2016. "Multicriteria analysis in selecting the optimal variant of solar system." E3S Web of Conferences 10, no. : 78.