Construction Management

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http://etd.aau.edu.et/handle/123456789/1071

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Browsing Construction Management by Author "Denamo Addissie (PhD)"

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    A Study of Alternative Wall Making Materials Selection Using Ahp Method
    (Addis Ababa University, 2022-06-01) Behailu Workneh Tolu; Denamo Addissie (PhD)
    Material selection is a complex and delicate task determined by the vast number of building material options. Likewise, multiple factors are often considered by the architect or building designer when evaluating the various categories of building materials. As a result, these sets of factors or variables often present tradeoffs that further complicate the decision-making process. To ease the material-selection process, this study examines the relevant factors or variables needed to develop a systematic and efficient material-selection system. Through the analysis of frequency data and results of the study, it has identified the potential factors that will impact designers’ decisions in their choice of wall making alternative building materials, during the design-decision making process. The application of the criteria for the quantitative evaluation and selection of the best alternative building material, using the analytic hierarchy process model, are discussed. The developed decision support system assist designers to assess their consequences in terms of whether or not a material option is likely to be best chosen over the existing conditions. The study also investigates the existing situations in the application of alternative wall making building materials. It assesses the current materials which are being used as a wall making alternative building materials, the extent of usage and barriers to use these materials. Keywords: decision making process; factors or variables; selection criteria; alternative building materials; selection framework; analytical hierarchy process (AHP)
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    Innovative Tendering Practice: E - Tendering Applicability for the Procurement of Ethiopian Federal Road Construction Projects
    (Addis Ababa University, 2021-08-01) Hilina Belachew Demisse; Denamo Addissie (PhD)
    Construction procurement is considered to be one of the most critical stages throughout the lifecycle of construction projects. However, bidding practice which is one of the steps in procurement is identified as one of the major shortcomings of the Ethiopian construction industry. The fact that the current Ethiopian construction tendering practice is paper-based has several drawbacks like human errors in document production, poor audit trail, access problems, security concerns, insufficient copies, and time-consuming being the major ones. This paper analyses the current practice of paper-based tendering in road construction projects along with its challenges & how it can be improved via e- tendering implementation. To answer these questions, the perception & experience of tendering professionals involved in the road construction projects was assessed via a questionnaire & interview survey. Few e-tendering practitioners were also interviewed about their experience while implementing the system. Accordingly, the result showed that e-tendering was perceived to be advantageous and would improve the time, cost, communication, documentation, tender evaluation, resource consumption, and transparency of the tendering process. However, the result also revealed many factors related to management, organization, environment, & technology that may hinder the implementation of the system. Thus, due to the potential benefits of e-tendering highlighted in this paper, it requires more attention from the government & the procuring entities for its greater expansion & adoption to ultimately contribute to the growth of the country‟s economy. Accordingly, findings from the literature review, survey, and document review were finally incorporated in the conceptual framework developed for e-tendering implementation in the study area. The framework was validated using a focus group discussion & a semi- structured interview with tendering professionals engaged in the study area and amendments were made accordingly. Its clarity, comprehensiveness, relevance, simplicity, & future applicability was also assured via the questionnaires developed.
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    The Practice of Building Demolition In Addis Ababa City: Current Practice Assessment and Regulatory Framework Development
    (Addis Ababa University, 2022-06-01) Tirufat Mekuria; Denamo Addissie (PhD)
    The Addis Ababa city Administration has been demolishing old buildings and clearing up slum areas for urban renewal purpose for quite some time now. This is being carried out either as part of a government development plan or due to strong interest of foreign investors to participate in the housing and hospitality sector. In addition, increased value of land invited local private property owners to upgrade existing structures in to more income generating spaces aiming at maximizing benefits. However, the practice is not coping up with the technological advancements in the area; rather it is highly dependent on the experience and skill of individuals involved. The fact that Ethiopia doesn’t have a code of practice for building demolition has paved the way for the practice to be performed in non-structured manner. This research started aiming at achieving three objectives; the first being examining the current practice of building demolition in Addis Ababa city. This was done by using selected cases to detect the loop holes through direct observation and interviewing representatives of parties involved in a building demolition project. Furthermore, an in-depth document analysis was done on existing local protocols; ranging from policies to codes and regulations, that can serve as a starting point to develop the framework. As a result, the gaps were analyzed in five major categories related to stakeholders management, planning and methodologies, safety, environment and waste management, productivity and performance recording. The second objective goes on with examining the international trend of the sector through intensive review of literatures so as to derive key performance indicators to evaluate the local practice against later on. For this, it was necessary to benchmark certain countries with best practice, such as Kenya, India, Hong Kong and the Netherlands. Afterwards, standard factors extracted from the study were categorized under generic sections after critical adaptations are made. The third and final objective of this research was to develop a guiding regulatory framework aiming to serve as a milestone point for the regulatory authority. The developed framework describes the main actors of the building demolition ecosystem and states the major responsibility of each entity for the success of the cycle. Finally, it concludes by summarizing the findings of the research in such a way that the practice lacks proper emphasis from the regulatory body in terms of standardizing work items like contracts and safety protocol strictly to follow while performing the act. In addition, qualification of professional is another area which needs big work in order to rescue the system being reliant on personal skill. As far as the recommendation points are concerned, the study suggests for the upper regulatory body to draft a standard code of practice so as to set the minimum requirement of professionals and the other stakeholders. In addition, it was also recommended that regulatory body to have a distinct organ dedicated to keeping the performance record of the sector in order to make future plans and structure demolition acts in more coordinated manner. At last, studies related to waste management and recycling, pattern against city expansion and application of prefabricated elements vs demolition are suggested for further research. Key Words: Building demolition, Construction Industry, Building, Code of practice, Regulatory framework
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    The Practice of Building Demolition in Addis Ababa City: Current Practice Assessment and Regulatory Framework Development
    (Addis Ababa Universty, 2022-06-01) Tirufat Mekuria; Denamo Addissie (PhD)
    The Addis Ababa city Administration has been demolishing old buildings and clearing up slum areas for urban renewal purpose for quite some time now. This is being carried out either as part of a government development plan or due to strong interest of foreign investors to participate in the housing and hospitality sector. In addition, increased value of land invited local private property owners to upgrade existing structures in to more income generating spaces aiming at maximizing benefits. However, the practice is not coping up with the technological advancements in the area; rather it is highly dependent on the experience and skill of individuals involved. The fact that Ethiopia doesn’t have a code of practice for building demolition has paved the way for the practice to be performed in non-structured manner. This research started aiming at achieving three objectives; the first being examining the current practice of building demolition in Addis Ababa city. This was done by using selected cases to detect the loop holes through direct observation and interviewing representatives of parties involved in a building demolition project. Furthermore, an in-depth document analysis was done on existing local protocols; ranging from policies to codes and regulations, that can serve as a starting point to develop the framework. As a result, the gaps were analyzed in five major categories related to stakeholders management, planning and methodologies, safety, environment and waste management, productivity and performance recording. The second objective goes on with examining the international trend of the sector through intensive review of literature s so as to derive key performance indicators to evaluate the local practice against later on. For this, it was necessary to benchmark certain countries with best practice, such as Kenya, India, Hong Kong and the Netherlands. Afterwards, standard factors extracted from the study were categorized under generic sections after critical adaptations are made. The third and final objective of this research was to develop a guiding regulatory framework aiming to serve as a milestone point for the regulatory authority. The developed framework describes the main actors of the building demolition ecosystem and states the major responsibility of each entity for the success of the cycle. Finally, it concludes by summarizing the findings of the research in such a way that the practice lacks proper emphasis from the regulatory body in terms of standardizing work items like contracts and safety protocol strictly to follow while performing the act. In addition, qualification of professional is another area which needs big work in order to rescue the system being reliant on personal skill. As far as the recommendation points are concerned, the study suggests for the upper regulatory body to draft a standard code of practice so as to set the minimum requirement of professionals and the other stakeholders. In addition, it was also recommended that regulatory body to have a distinct organ dedicated to keeping the performance record of the sector in order to make future plans and structure demolition acts in more coordinated manner. At last, studies related to waste management and recycling, pattern against city expansion and application of prefabricated elements vs demolition are suggested for further research. Key Words: Building demolition, Construction Industry, Building, Code of practice, Regulatory framework