Original Model for Estimating the Whole Life Costs of Buildings and its Verification

Plebankiewicz, Edyta; Zima, Krzysztof; Wieczorek, Damian

doi:10.2478/ace-2019-0026

Cited by 23 publications

(27 citation statements)

References 16 publications

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“…As indicated in the authors' publications [20,22], in the model for estimating the whole life costs of buildings allowing quantification of the cost allowance for risk, the fuzzy set theory is combined with a method used to analyze the economic efficiency of construction projects based on discounted cash flows (dCF). This is the net present worth method (NPW), which in the model for estimating the whole life costs of buildings is applicable in a fuzzy version (the fuzzy NPW method).…”

Section: Main Assumptions Of the Modelmentioning

confidence: 99%

“…Figure 1 presents the basic set of membership functions of fuzzy numbers (functions with line segment graph) for the input data without risk (Figure 1a), for discount rate (Figure 1b) and for temporal parameters TG and TL, and for financial FC and FI where the impact of risk on the amount of the parameter concerned will be taken into account (Figure 1c,d). The possibilities of using alternative sets of fuzzy number membership functions are described by [22].…”

Section: Division and Parameterization Of Input Data To The Modelmentioning

confidence: 99%

“…Table 2 presents the values of input parameters (time and financial ones) adopted for the LCCA analysis. The possibilities of using alternative sets of fuzzy number membership functions are described by [22].…”

Section: Lcca With Use Of Fuzzy Approach and The Model For Estimatingmentioning

confidence: 99%

“…Taking into account the above, the authors attempted to develop a complex model for estimating the whole life costs of buildings, which enables the quantification of cost addition for risk, and which allows the investor to compare buildings in terms of a number of economic criteria, namely: life cycle costs (LCC-when the investor cannot record incomes), whole life costs (WLC-when, in addition to incurring costs in the phases of the building life cycle, the investor will also be able to record incomes), life cycle equivalent annual costs (LCEAC-when the durations of the exploitation phase differ) and cost addition for risk (∆R LCC -expressed as a difference in currency units between the amount of the life cycle cost of a building which takes into account the impact of risk, and the value of the life cycle cost of a building that does not respect this influence). The authors based the assumptions of the model on the fuzzy approach, and the subsequent stages of the model development are treated by their numerous publications [17][18][19][20], including the publications on verification studies investigating the correctness of the model's operation [21,22].…”

Section: Introductionmentioning

confidence: 99%

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Probabilistic and Fuzzy Approaches for Estimating the Life Cycle Costs of Buildings under Conditions of Exposure to Risk

et al. 2019

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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.

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Section: Main Assumptions Of the Modelmentioning

confidence: 99%

Section: Division and Parameterization Of Input Data To The Modelmentioning

confidence: 99%

Section: Lcca With Use Of Fuzzy Approach and The Model For Estimatingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Probabilistic and Fuzzy Approaches for Estimating the Life Cycle Costs of Buildings under Conditions of Exposure to Risk

et al. 2019

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“…However, the article takes into account an interesting approach of authors such as Nowogońska [ 8 , 9 ], Saleh [ 14 , 15 ], Frangopol [ 22 ], Silva [ 23 ] and Plebankiewicz [ 24 , 25 ], which was published in recent years. It considers the entire life cycle of a building object, even after exceeding its assumed durability, up to the so-called technical death of the building.…”

Section: Introductionmentioning

confidence: 99%

Overdurability and Technical Wear of Materials Used in the Construction of Old Buildings

Konior

2021

Materials

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The technical maintenance of old tenement houses traditionally constructed is an ongoing problem, and will continue to be so in the coming years. The subject of the article includes old residential buildings from the turn of the XIX and XX centuries, which are a part of Wroclaw’s downtown district. They can be understood as an essential link in the process of shaping the cultural and social microenvironment of man. The ability of them to meet the multiple expectations of residents depends on the natural aging of tenement houses’ materials, the methods of their maintenance and use, and the influence of the many factors that cause their accelerated wear. The assumed durability is the main reference parameter of the changing age of the inspected tenement houses. The course of the theoretical and observed degree of the technical wear of these buildings was compared with their durability. For the age of these buildings, the technical wear should reach 100%. It was observed that in the first period of use of tenement houses, the phenomenon of “infradurability” occurs, and after exceeding a certain age—depending on the maintenance conditions of the building—the phenomenon of “overdurability” of the building occurs. It was shown that the durability of important elements of old buildings, as a parameter that was defined “a posteriori”, ranges from 153 to 177 years, and is greater than the corresponding literature values indicated “a priori”. The probability of reaching such an age of an element, in which the observed values of technical wear exceed the theoretical values, is much higher than the probability of an opposite event. A comparative analysis of the distribution functions of these probabilities indicates that the probabilities of theoretical wear values are higher than those observed in the case of the assumed literature durability of elements. There is also an inverse relationship for durability that corresponds to the age of the oldest examined elements of tenement houses.

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Determination of Optimum Unbalanced Accelerations to Minimize Rail Side Wearing

Beltiukov

Andreev

2022

International Scientific Siberian Transport Forum TransSiberia - 2021

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Original Model for Estimating the Whole Life Costs of Buildings and its Verification

Cited by 23 publications

References 16 publications

Probabilistic and Fuzzy Approaches for Estimating the Life Cycle Costs of Buildings under Conditions of Exposure to Risk

Probabilistic and Fuzzy Approaches for Estimating the Life Cycle Costs of Buildings under Conditions of Exposure to Risk

Overdurability and Technical Wear of Materials Used in the Construction of Old Buildings

Determination of Optimum Unbalanced Accelerations to Minimize Rail Side Wearing

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