Abstract This study aims at constructing short-term forecast models by analyzing the patterns of the heating degree day (HDD). In this context, two different time series analyses, namely the decomposition and Box–Jenkins methods, were conducted. The monthly HDD data in France between 1974 and 2017 were used for analyses. The multiplicative model and 79 SARIMA models were constructed by the decomposition and Box–Jenkins method, respectively. The performance of the SARIMA models was assessed by the adjusted R2 value, residual sum of squares, the Akaike Information Criteria, the Schwarz Information Criteria, and the analysis of the residuals. Moreover, the mean absolute percentage error, mean absolute deviation, and mean squared deviation values were calculated to evaluate the performance of both methods. The results show that the decomposition method yields more acceptable forecasts than the Box–Jenkins method for supporting short-term forecasting of the HDD.
{"title":"Application of time series models for heating degree day forecasting","authors":"Merve Kuru, G. Calis","doi":"10.2478/otmcj-2020-0009","DOIUrl":"https://doi.org/10.2478/otmcj-2020-0009","url":null,"abstract":"Abstract This study aims at constructing short-term forecast models by analyzing the patterns of the heating degree day (HDD). In this context, two different time series analyses, namely the decomposition and Box–Jenkins methods, were conducted. The monthly HDD data in France between 1974 and 2017 were used for analyses. The multiplicative model and 79 SARIMA models were constructed by the decomposition and Box–Jenkins method, respectively. The performance of the SARIMA models was assessed by the adjusted R2 value, residual sum of squares, the Akaike Information Criteria, the Schwarz Information Criteria, and the analysis of the residuals. Moreover, the mean absolute percentage error, mean absolute deviation, and mean squared deviation values were calculated to evaluate the performance of both methods. The results show that the decomposition method yields more acceptable forecasts than the Box–Jenkins method for supporting short-term forecasting of the HDD.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"12 1","pages":"2137 - 2146"},"PeriodicalIF":2.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48684902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gul Polat, Harun Turkoglu, Atilla Damci, Firat Akin
Abstract Unbalanced bidding, also known as skewed bidding, is the process of increasing and/or decreasing the prices of various bid items without altering the total offered bid price. Bids can be unbalanced either mathematically (front-end loading) or materially (quantity error exploitation). Owners should be very careful when evaluating the tenders as awarding a contract to an unbalanced bid may result in severe cost overruns because the prices of those items do not reflect their true costs and markup allocations. Unbalanced bidding is still a contentious issue in the construction industry. While some researchers consider it as a legal bidding strategy in such a fierce competitive business environment, others view it as an unethical practice and claim that unbalanced bids should be disqualified. Studies regarding unbalanced bidding can be categorized into two groups: (1) the ones focusing on detecting or preventing this practice to help owners; and 2) the ones focusing on optimizing unbalanced bidding to help contractors. This study aims to develop a model, which consists of eight grading systems, to assist owners in detecting materially unbalanced bids. The proposed model is the improved version of the previous model, which was composed of five grading systems. In order to demonstrate how this grading-based model can be used by owners, an illustrative example is presented. It was found that owners can easily and successfully detect unbalanced bids via the proposed model.
{"title":"Detecting unbalanced bids via an improved grading-based model","authors":"Gul Polat, Harun Turkoglu, Atilla Damci, Firat Akin","doi":"10.2478/otmcj-2020-0004","DOIUrl":"https://doi.org/10.2478/otmcj-2020-0004","url":null,"abstract":"Abstract Unbalanced bidding, also known as skewed bidding, is the process of increasing and/or decreasing the prices of various bid items without altering the total offered bid price. Bids can be unbalanced either mathematically (front-end loading) or materially (quantity error exploitation). Owners should be very careful when evaluating the tenders as awarding a contract to an unbalanced bid may result in severe cost overruns because the prices of those items do not reflect their true costs and markup allocations. Unbalanced bidding is still a contentious issue in the construction industry. While some researchers consider it as a legal bidding strategy in such a fierce competitive business environment, others view it as an unethical practice and claim that unbalanced bids should be disqualified. Studies regarding unbalanced bidding can be categorized into two groups: (1) the ones focusing on detecting or preventing this practice to help owners; and 2) the ones focusing on optimizing unbalanced bidding to help contractors. This study aims to develop a model, which consists of eight grading systems, to assist owners in detecting materially unbalanced bids. The proposed model is the improved version of the previous model, which was composed of five grading systems. In order to demonstrate how this grading-based model can be used by owners, an illustrative example is presented. It was found that owners can easily and successfully detect unbalanced bids via the proposed model.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"12 1","pages":"2072 - 2082"},"PeriodicalIF":2.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44713570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Lenz, Kai Weist, M. Hoepfner, P. Spyridis, M. Gralla
Abstract In the last few years, particular focus has been devoted to the life cycle performance of fastening systems, which is reflected in increasing numbers of publications, standards and large-scale research efforts. Simultaneously, experience shows that in many cases, where fastening systems are implemented – such as industrial facilities – the design of fasteners is governed by fatigue loading under dynamic characteristics. In order to perform an adequate design and to specify the most efficient and appropriate fastening product, the engineer needs to access and process a broad range of technical and commercial information. Building information modelling (BIM), as a data management method in the construction industry, can supply such information and accommodate a comprehensive design and specification process. Furthermore, the application of BIM-based processes, such as the generation of a BIM-model, allows to use the important information for the construction as well as the life cycle management with different actions and time dependencies of the asset and its components. As a consequence, the BIM model offers the potential to correlate different data relevant for achieving the goals of the respective application, in order to ensure a more effective and correct design of the fastening. This paper demonstrates such a BIM-based design framework for an Industry 4.0 case, and in particular, the installation of a factory robot through post-installed anchors under fatigue-relevant loading in concrete.
{"title":"Symbiosis of life-cycle structural design and asset management based on Building Information Modeling: Application for industrial facility equipment","authors":"L. Lenz, Kai Weist, M. Hoepfner, P. Spyridis, M. Gralla","doi":"10.2478/otmcj-2020-0013","DOIUrl":"https://doi.org/10.2478/otmcj-2020-0013","url":null,"abstract":"Abstract In the last few years, particular focus has been devoted to the life cycle performance of fastening systems, which is reflected in increasing numbers of publications, standards and large-scale research efforts. Simultaneously, experience shows that in many cases, where fastening systems are implemented – such as industrial facilities – the design of fasteners is governed by fatigue loading under dynamic characteristics. In order to perform an adequate design and to specify the most efficient and appropriate fastening product, the engineer needs to access and process a broad range of technical and commercial information. Building information modelling (BIM), as a data management method in the construction industry, can supply such information and accommodate a comprehensive design and specification process. Furthermore, the application of BIM-based processes, such as the generation of a BIM-model, allows to use the important information for the construction as well as the life cycle management with different actions and time dependencies of the asset and its components. As a consequence, the BIM model offers the potential to correlate different data relevant for achieving the goals of the respective application, in order to ensure a more effective and correct design of the fastening. This paper demonstrates such a BIM-based design framework for an Industry 4.0 case, and in particular, the installation of a factory robot through post-installed anchors under fatigue-relevant loading in concrete.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"12 1","pages":"2170 - 2180"},"PeriodicalIF":2.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42075881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sanjin Gumbarević, B. Milovanović, M. Bagaric, Mergim Gaši, Ivana Burcar Dunović
Abstract The energy performance of buildings directive requires from the European Union Member States to ensure that by 31 December 2020 all new buildings are nearly zero-energy buildings (NZEBs) and after 31 December 2018, new buildings occupied/owned by the public authorities should also have the NZEB performance. The large-scale deployment of NZEBs represents a challenge for all the stakeholders involved in the construction sector, where the lack of adequate competences is identified as one of the main obstacles. This article aims to provide a solution to overcome the deficient competences related to NZEB to increase them by using roadmaps derived from Horizon projects – Fit-to-NZEB and Net-UBIEP. Fit-to-NZEB aims to increase the knowledge of architecture, engineering and construction engineers and workers in deep energy retrofit through the education in European qualifications framework levels 3–7, while Net-UBIEP seeks to develop the schemes for using building information modelling (BIM) throughout the whole building life cycle to increase energy performance. The results from both projects show that it is inevitable to act soon to make the energy efficiency targets possible to fulfil. The integrated design process and strengthen control on the construction site should be carried out perfectly as they are the most critical parts in delivering NZEBs and all this managed by BIM to minimise information loss and to improve the design of details. To achieve this, professional competences of all the stakeholders in delivering NZEBs must be improved which could be done by implementing the knowledge from these projects.
摘要《建筑能源性能指令》要求欧盟成员国确保在2020年12月31日之前，所有新建筑都是几乎零能源建筑（NZEB），而在2018年12月30日之后，公共当局占用/拥有的新建筑也应具有NZEB性能。NZEB的大规模部署对建筑行业的所有利益相关者来说都是一个挑战，缺乏足够的能力被认为是建筑行业的主要障碍之一。本文旨在提供一种解决方案，通过使用Horizon项目的路线图——适合NZEB和净UBIEP，克服与NZEB相关的能力不足，以提高这些能力。Fit to NZEB旨在通过欧洲资格框架第3-7级的教育，提高建筑、工程和施工工程师和工人在深度能源改造方面的知识，而Net UBIEP则致力于开发在整个建筑生命周期中使用建筑信息建模（BIM）的方案，以提高能源性能。这两个项目的结果表明，必须尽快采取行动，使能源效率目标能够实现。综合设计过程和加强施工现场控制应完美实施，因为它们是交付NZEB的最关键部分，所有这些都由BIM管理，以最大限度地减少信息损失并改进细节设计。为了实现这一点，必须提高所有利益相关者在提供NZEB方面的专业能力，这可以通过实施这些项目的知识来实现。
{"title":"Improving competences of engineers and workers in the AEC industry for delivering NZEBs","authors":"Sanjin Gumbarević, B. Milovanović, M. Bagaric, Mergim Gaši, Ivana Burcar Dunović","doi":"10.2478/otmcj-2020-0021","DOIUrl":"https://doi.org/10.2478/otmcj-2020-0021","url":null,"abstract":"Abstract The energy performance of buildings directive requires from the European Union Member States to ensure that by 31 December 2020 all new buildings are nearly zero-energy buildings (NZEBs) and after 31 December 2018, new buildings occupied/owned by the public authorities should also have the NZEB performance. The large-scale deployment of NZEBs represents a challenge for all the stakeholders involved in the construction sector, where the lack of adequate competences is identified as one of the main obstacles. This article aims to provide a solution to overcome the deficient competences related to NZEB to increase them by using roadmaps derived from Horizon projects – Fit-to-NZEB and Net-UBIEP. Fit-to-NZEB aims to increase the knowledge of architecture, engineering and construction engineers and workers in deep energy retrofit through the education in European qualifications framework levels 3–7, while Net-UBIEP seeks to develop the schemes for using building information modelling (BIM) throughout the whole building life cycle to increase energy performance. The results from both projects show that it is inevitable to act soon to make the energy efficiency targets possible to fulfil. The integrated design process and strengthen control on the construction site should be carried out perfectly as they are the most critical parts in delivering NZEBs and all this managed by BIM to minimise information loss and to improve the design of details. To achieve this, professional competences of all the stakeholders in delivering NZEBs must be improved which could be done by implementing the knowledge from these projects.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"12 1","pages":"2256 - 2274"},"PeriodicalIF":2.1,"publicationDate":"2019-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47259015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Construction simulation is a versatile technique with numerous applications. The basic simulation methods are discrete-event simulation (DES), agent-based modeling (ABM), and system dynamics (SD). Depending on the complexity of the problem, using a basic simulation method might not be enough to model construction works appropriately; hybrid approaches are needed. These are combinations of basic methods, or pairings with other techniques, such as fuzzy logic (FL) and neural networks (NNs). This paper presents a framework for applying simulation for problems within the field of construction. It describes DES, SD, and ABM, in addition to presenting how hybrid approaches are most useful in being able to reflect the dynamic nature of construction processes and capture complicated behavior, uncertainties, and dependencies. The examples show the application of the framework for masonry works and how it could be used for obtaining better productivity estimates. Several structures of hybrid simulation are presented alongside their inputs, outputs, and interaction points, which provide a practical reference for researchers on how to implement simulation to model construction systems of labor-intensive activities and lays the groundwork for applications in other construction-related activities.
{"title":"Overview of construction simulation approaches to model construction processes","authors":"O. Bokor, L. Florez, A. Osborne, Barry J. Gledson","doi":"10.2478/otmcj-2018-0018","DOIUrl":"https://doi.org/10.2478/otmcj-2018-0018","url":null,"abstract":"Abstract Construction simulation is a versatile technique with numerous applications. The basic simulation methods are discrete-event simulation (DES), agent-based modeling (ABM), and system dynamics (SD). Depending on the complexity of the problem, using a basic simulation method might not be enough to model construction works appropriately; hybrid approaches are needed. These are combinations of basic methods, or pairings with other techniques, such as fuzzy logic (FL) and neural networks (NNs). This paper presents a framework for applying simulation for problems within the field of construction. It describes DES, SD, and ABM, in addition to presenting how hybrid approaches are most useful in being able to reflect the dynamic nature of construction processes and capture complicated behavior, uncertainties, and dependencies. The examples show the application of the framework for masonry works and how it could be used for obtaining better productivity estimates. Several structures of hybrid simulation are presented alongside their inputs, outputs, and interaction points, which provide a practical reference for researchers on how to implement simulation to model construction systems of labor-intensive activities and lays the groundwork for applications in other construction-related activities.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"11 1","pages":"1853 - 1861"},"PeriodicalIF":2.1,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49452284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract In an increasingly volatile, uncertain, complex and ambiguous (VUCA) world, managers of capital projects are under relentless pressure to consistently meet their performance expectations. At the execution stage, managers have to constantly orchestrate competing demands on scare resources and, simultaneously, manage project operations to meet time, costs and quality compliances. This calls for simple methods to distinguish factors that could cause execution stage delays and prioritise their remedial actions. The objective, therefore, was to propose and test a methodology through empirical evidence, which could be useful for managers to focus on the distinguishing factors (rather than on all factors) to achieve execution excellence. We used a three-stage methodology leveraging the existing Project Management Institute (PMI) framework to define variables and then tested the methodology using case data generated from projects adopting a grounded theory approach. A set-theoretic, multi-value qualitative comparative analysis (QCA) tool helped appropriately configure this empirical case data and a subsequent Boolean minimisation technique then identified the distinguishing factor(s) that explained superior project schedule performance. The results corroborated literature findings. Two contributions emerged from this study: (a) our methodology enabled a richer analysis of the case than what would have been possible by adopting a more conventional approach; and (b) there is a potential for a domain-specific extension of the PMI framework to cover technology transfer projects having their unique knowledge areas.
{"title":"Identifying New Knowledge Areas to Strengthen the Project Management Institute (PMI) Framework","authors":"C. Iyer, P. Banerjee","doi":"10.2478/otmcj-2018-0014","DOIUrl":"https://doi.org/10.2478/otmcj-2018-0014","url":null,"abstract":"Abstract In an increasingly volatile, uncertain, complex and ambiguous (VUCA) world, managers of capital projects are under relentless pressure to consistently meet their performance expectations. At the execution stage, managers have to constantly orchestrate competing demands on scare resources and, simultaneously, manage project operations to meet time, costs and quality compliances. This calls for simple methods to distinguish factors that could cause execution stage delays and prioritise their remedial actions. The objective, therefore, was to propose and test a methodology through empirical evidence, which could be useful for managers to focus on the distinguishing factors (rather than on all factors) to achieve execution excellence. We used a three-stage methodology leveraging the existing Project Management Institute (PMI) framework to define variables and then tested the methodology using case data generated from projects adopting a grounded theory approach. A set-theoretic, multi-value qualitative comparative analysis (QCA) tool helped appropriately configure this empirical case data and a subsequent Boolean minimisation technique then identified the distinguishing factor(s) that explained superior project schedule performance. The results corroborated literature findings. Two contributions emerged from this study: (a) our methodology enabled a richer analysis of the case than what would have been possible by adopting a more conventional approach; and (b) there is a potential for a domain-specific extension of the PMI framework to cover technology transfer projects having their unique knowledge areas.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"11 1","pages":"1892 - 1903"},"PeriodicalIF":2.1,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49571124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The aim of this research is to investigate the role of the good-to-great concept as an approach for enhancing the performance of architectural design firms (ADFs) through addressing the gap of workforce skills in developing countries. To achieve this aim, a research methodology was designed to accomplish four objectives: (1) building a comprehensive background about the topic through covering the nature of the construction industry, gap of workforce skills, previous approaches used to address this issue and the good-to-great concept; (2) presenting and analyzing two case studies to investigate the role of the good-to-great concept as an approach to fill the gap of workforce skills in organizations; (3) investigating the perception and application of the good-to-great concept for addressing the gap of workforce skills to enhance the performance of ADFs and (4) developing a framework to enhance the performance of ADFs through bridging the gap of workforce skills in ADFs using the good-to-great concept. Findings of this research showed that the issue of gap of workforce skills threatens all types of industries including construction industry. The demand of ADFs became greater than the supply of skilled employees which indicates a critical issue encountered by these firms. Thus, the good-to-great concept that has never been adopted in ADFs before is proposed as a novel approach to tackle this issue.
{"title":"Enhancing the performance of architectural design firms through addressing the gap of workforce skills in developing countries: a good-to-great approach","authors":"A. Othman, Dana Ashraf Sokkar","doi":"10.2478/otmcj-2018-0016","DOIUrl":"https://doi.org/10.2478/otmcj-2018-0016","url":null,"abstract":"Abstract The aim of this research is to investigate the role of the good-to-great concept as an approach for enhancing the performance of architectural design firms (ADFs) through addressing the gap of workforce skills in developing countries. To achieve this aim, a research methodology was designed to accomplish four objectives: (1) building a comprehensive background about the topic through covering the nature of the construction industry, gap of workforce skills, previous approaches used to address this issue and the good-to-great concept; (2) presenting and analyzing two case studies to investigate the role of the good-to-great concept as an approach to fill the gap of workforce skills in organizations; (3) investigating the perception and application of the good-to-great concept for addressing the gap of workforce skills to enhance the performance of ADFs and (4) developing a framework to enhance the performance of ADFs through bridging the gap of workforce skills in ADFs using the good-to-great concept. Findings of this research showed that the issue of gap of workforce skills threatens all types of industries including construction industry. The demand of ADFs became greater than the supply of skilled employees which indicates a critical issue encountered by these firms. Thus, the good-to-great concept that has never been adopted in ADFs before is proposed as a novel approach to tackle this issue.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"11 1","pages":"1911 - 1924"},"PeriodicalIF":2.1,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49171365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mingxue Ma, V. Tam, Zhiyu Huang, M. Sing, Liyin Shen
Abstract Reform of the Chinese petroleum industry has entered its second phase since early 1999. The productivity of the petroleum industry has been greatly improved, while the safety performance and records are not satisfactory. This paper investigates the critical factors for improving safety performance in the Chinese petroleum industry. The data used for the analysis are from a questionnaire survey administered to 480 professionals in the petroleum industry in which 143 valid responses were received. Statistical analysis techniques are used to analyze the data collected. The findings revealed that the most significant source of the safety problem is due to the combination of several reasons, including (a) violation on operating procedures, (b) obsolete facilities and equipment failures, (c) insufficient safety management system, (d) improper commands, number of casualties, and (e) production performances and operating skills. The three most essential protective methods include safety training and increasing staff’s safety consciousness, cultivating safety culture, and enhancing equipment management and detecting hazards in time.
{"title":"Evaluation of workplace safety performance in the Chinese petroleum industry","authors":"Mingxue Ma, V. Tam, Zhiyu Huang, M. Sing, Liyin Shen","doi":"10.2478/otmcj-2018-0013","DOIUrl":"https://doi.org/10.2478/otmcj-2018-0013","url":null,"abstract":"Abstract Reform of the Chinese petroleum industry has entered its second phase since early 1999. The productivity of the petroleum industry has been greatly improved, while the safety performance and records are not satisfactory. This paper investigates the critical factors for improving safety performance in the Chinese petroleum industry. The data used for the analysis are from a questionnaire survey administered to 480 professionals in the petroleum industry in which 143 valid responses were received. Statistical analysis techniques are used to analyze the data collected. The findings revealed that the most significant source of the safety problem is due to the combination of several reasons, including (a) violation on operating procedures, (b) obsolete facilities and equipment failures, (c) insufficient safety management system, (d) improper commands, number of casualties, and (e) production performances and operating skills. The three most essential protective methods include safety training and increasing staff’s safety consciousness, cultivating safety culture, and enhancing equipment management and detecting hazards in time.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"11 1","pages":"1904 - 1910"},"PeriodicalIF":2.1,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47478984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Based on the international literature, the effect of an existing panoramic view on the market value of properties is positive and significant. This value-adding factor varies by location and by type of view. In Central Europe, no such evaluation study has been elaborated until now. New building construction may restrict the existing panorama, and this is the other side of the same phenomenon. View restriction may result in stigmatization, which is a negative effect on the property. There are two major methodologies to observe the effect: revealed preference method (RPM) and stated preference method (SPM). One SPM approach is contingent valuation (CV), wherein well-informed stakeholders give their opinion about the impact caused by the investigated effect. The CV methodology, using the Delphi approach, was employed to observe the market value decrease in the cases of several restricted panorama situations in Budapest. Based on the research, this effect in Budapest is in line with the published western results. The result of the study can be used to support real estate developers and architects in their development decisions. This is an extended version of the article titled “The impact of view-restriction: a Delphi case study from Budapest”, presented at Creative Construction Conference 2018, CCC 2017, 30 June to 3 July 2018, Ljubljana, Slovenia.
{"title":"Market value of the view restriction","authors":"I. Hajnal","doi":"10.2478/otmcj-2019-0002","DOIUrl":"https://doi.org/10.2478/otmcj-2019-0002","url":null,"abstract":"Abstract Based on the international literature, the effect of an existing panoramic view on the market value of properties is positive and significant. This value-adding factor varies by location and by type of view. In Central Europe, no such evaluation study has been elaborated until now. New building construction may restrict the existing panorama, and this is the other side of the same phenomenon. View restriction may result in stigmatization, which is a negative effect on the property. There are two major methodologies to observe the effect: revealed preference method (RPM) and stated preference method (SPM). One SPM approach is contingent valuation (CV), wherein well-informed stakeholders give their opinion about the impact caused by the investigated effect. The CV methodology, using the Delphi approach, was employed to observe the market value decrease in the cases of several restricted panorama situations in Budapest. Based on the research, this effect in Budapest is in line with the published western results. The result of the study can be used to support real estate developers and architects in their development decisions. This is an extended version of the article titled “The impact of view-restriction: a Delphi case study from Budapest”, presented at Creative Construction Conference 2018, CCC 2017, 30 June to 3 July 2018, Ljubljana, Slovenia.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"11 1","pages":"1925 - 1932"},"PeriodicalIF":2.1,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43711466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Augmented reality (AR) and virtual reality (VR), a kingdom-of-the-art technology for superimposing information onto the real world, have recently started to have an effect on our everyday lives. In addition, AR and VR have shown a great contribution to advanced construction management in recent years. However, a comprehensive critical review of AR and VR technologies in construction management is absent in the literature. This study provides a comprehensive review of a summary of using potential opportunities of AR and VR to solve a variety of construction management issues effectively and efficiently. This study found that AR is successfully used in construction project scheduling, progress tracking, worker training, safety management, time and cost management, and quality and defects management. VR is effectively used as a visualization tool, worker training technology, safety management tool, and quality and defects management tool. In addition, AR and VR are used for developing a network that allows the possibility of having conferences with those who are geographically far off from each other or the construction site. This study could help to explore the potential fields of using AR and VR technologies in the construction industry effectively as advance time- and cost-saving profitable tools.
{"title":"A Review on Using Opportunities of Augmented Reality and Virtual Reality in Construction Project Management","authors":"Shakil Ahmed","doi":"10.2478/otmcj-2018-0012","DOIUrl":"https://doi.org/10.2478/otmcj-2018-0012","url":null,"abstract":"Abstract Augmented reality (AR) and virtual reality (VR), a kingdom-of-the-art technology for superimposing information onto the real world, have recently started to have an effect on our everyday lives. In addition, AR and VR have shown a great contribution to advanced construction management in recent years. However, a comprehensive critical review of AR and VR technologies in construction management is absent in the literature. This study provides a comprehensive review of a summary of using potential opportunities of AR and VR to solve a variety of construction management issues effectively and efficiently. This study found that AR is successfully used in construction project scheduling, progress tracking, worker training, safety management, time and cost management, and quality and defects management. VR is effectively used as a visualization tool, worker training technology, safety management tool, and quality and defects management tool. In addition, AR and VR are used for developing a network that allows the possibility of having conferences with those who are geographically far off from each other or the construction site. This study could help to explore the potential fields of using AR and VR technologies in the construction industry effectively as advance time- and cost-saving profitable tools.","PeriodicalId":42309,"journal":{"name":"Organization Technology and Management in Construction","volume":"11 1","pages":"1839 - 1852"},"PeriodicalIF":2.1,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2478/otmcj-2018-0012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44258842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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