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Usama Issa
Civil Engineering Department, College of Engineering, Taif University, Taif 21099, Saudi Arabia

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Short Biography

Usama Hamed Issa works in the Civil Engineering Department., Minia University, Egypt, currently in Taif university, KSA. Usama undertakes research in risk management, construction decision making, lean construction, and civil engineering. His current project is on modelling for quantifying risks in construction projects as well as evaluating lean implementation and causes of waste in construction projects. Previous studies and research were at: the Institute for Technology and Management in Construction, Karlsruhe Universty, Karlsruhe, Germany; and the Civil and Environmental Engineering Department, Gunma University, Japan.

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Journal article
Published: 29 July 2021 in Sustainability
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This paper discusses in detail the current level of awareness of the Saudi Arabia stakeholders regarding the use and application of green building rating systems. The paper used a mix of qualitative and quantitative research methods through an exploratory method that utilized an online survey targeting experts and construction stakeholders to fill the gap of previous research papers and support the argument of the increase in the level of the awareness of stakeholders in the use and application of green building rating systems in Saudi Arabia. This research aims to focus on the level of awareness of the Saudi construction market stakeholders on green building rating systems in Saudi Arabia with focus on the Leadership in Energy and Environmental Design system LEED and Mostadam. It also investigated which rating system responds to the need of the Saudi construction market with regard to energy conservation and water consumption more effectively. The methodology utilized in this research used a combination of primary and secondary data where the primary data were a survey sent to Saudi construction stakeholders where a total of 1320 respondents participated in the survey. Results from this research showed a promising number of agreements between the participating stakeholders to the level of awareness of green building rating systems in Saudi Arabia and to the willingness to use internationally recognized rating systems such as LEED and the use of locally recognized systems such as Mostadam. Furthermore, the research aims to link the results with the Sustainable Development Goals (SDGs) with a focus on SDGs 6 and 7. The results show a high level of appreciation and agreement to the importance of energy and water conservation in green buildings that will be using either LEED or Mostadam in Saudi Arabia and accomplish the targets outlined under the SDGs.

ACS Style

Mohammed Al-Surf; Ashraf Balabel; Mamdooh Alwetaishi; Ahmed Abdelhafiz; Usama Issa; Ibrahim Sharaky; Amal Shamseldin; Mosleh Al-Harthi. Stakeholder’s Perspective on Green Building Rating Systems in Saudi Arabia: The Case of LEED, Mostadam, and the SDGs. Sustainability 2021, 13, 8463 .

AMA Style

Mohammed Al-Surf, Ashraf Balabel, Mamdooh Alwetaishi, Ahmed Abdelhafiz, Usama Issa, Ibrahim Sharaky, Amal Shamseldin, Mosleh Al-Harthi. Stakeholder’s Perspective on Green Building Rating Systems in Saudi Arabia: The Case of LEED, Mostadam, and the SDGs. Sustainability. 2021; 13 (15):8463.

Chicago/Turabian Style

Mohammed Al-Surf; Ashraf Balabel; Mamdooh Alwetaishi; Ahmed Abdelhafiz; Usama Issa; Ibrahim Sharaky; Amal Shamseldin; Mosleh Al-Harthi. 2021. "Stakeholder’s Perspective on Green Building Rating Systems in Saudi Arabia: The Case of LEED, Mostadam, and the SDGs." Sustainability 13, no. 15: 8463.

Journal article
Published: 01 July 2021 in Vaccines
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Selecting a vaccine for fighting a pandemic is one of the serious issues in healthcare. Novel decision models for vaccine selection need to be developed. In this study, a novel vaccine selection decision-making model (VSDMM) was proposed and developed, based on the analytic hierarchy process (AHP) technique, which assesses many alternatives (vaccines) using multi-criteria to support decision making. To feed data to the VSDMM, six coronavirus disease-19 (COVID-19) vaccines were selected in a case study to highlight the applicability of the proposed model. Each vaccine was compared to the others with respect to six criteria and all criteria were compared to calculate the relative weights. The proposed criteria include (1) vaccine availability; (2) vaccine formula; (3) vaccine efficacy; (4) vaccine-related side effects; (5) cost savings, and (6) host-related factors. Using the selected criteria, experts responded to questions and currently available COVID-19 vaccines were ranked according to their weight in the model. A sensitivity analysis was introduced to assess the model robustness and the impacts of changing criteria weights on the results. The VSDMM is flexible in terms of its ability to accept more vaccine alternatives and/or more criteria. It could also be applied to other current or future pandemics/epidemics in the world. In conclusion, this is the first report to propose a VSDMM for selecting the most suitable vaccines in pandemic/epidemic situations or any other situations in which vaccine selection and usage may be deemed necessary.

ACS Style

Sayed Abdelwahab; Usama Issa; Hossam Ashour. A Novel Vaccine Selection Decision-Making Model (VSDMM) for COVID-19. Vaccines 2021, 9, 718 .

AMA Style

Sayed Abdelwahab, Usama Issa, Hossam Ashour. A Novel Vaccine Selection Decision-Making Model (VSDMM) for COVID-19. Vaccines. 2021; 9 (7):718.

Chicago/Turabian Style

Sayed Abdelwahab; Usama Issa; Hossam Ashour. 2021. "A Novel Vaccine Selection Decision-Making Model (VSDMM) for COVID-19." Vaccines 9, no. 7: 718.

Journal article
Published: 04 June 2021 in Sustainability
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Improving building performance through reducing negative environmental impacts can be achieved by greening existing buildings (GEB), which is considered a very important sustainability process. Due to the risky and uncertain nature of the process of GEB, a growing amount of attention should be given to eliminating the effects of risks on GEB. This research aims to identify most expected risk factors related to GEB, as well as to evaluate their effects through calculating risk factor characteristics, such as risk factor presence (RFP), impact on the GEB process (IGEB), and impact on building performance in the long run (IBP), as new indices describe these risks. Sixty-six risk factors were categorized in seven risk groups related to the economic aspect, social aspect, environmental aspect, managerial aspect, sustainability operation, sustainable design, and renovation. Moreover, a fuzzy model for risk analysis was developed to combine the multi-effects of the aforementioned three risk factor characteristics in one index representing the risk factors’ overall importance. The model was applied and verified for data collected in Saudi Arabia. The results of this study showed that the most important risk group is the greening process of environmental control, while the least important is the greening process of renovation and construction. Using the proposed model improved the results of evaluating risks affecting GEB through merging the multi-effects of risk factor characteristics. The results and analysis proved that the most important key risk factors were environmental in nature. An intricate relationship of the impacts on the GEB process and building performance with the overall importance of the risk factors was clearly found. The decision makers who deal with greening projects in Saudi Arabia should be aware of the key risks identified in this study. The proposed methodology and model can be easily applied to other countries to help decision makers in evaluating their GEB projects, as well as comparing more greening projects based on risk analysis.

ACS Style

Usama Issa; Ibrahim Sharaky; Mamdooh Alwetaishi; Ashraf Balabel; Amal Shamseldin; Ahmed Abdelhafiz; Mohammed Al-Surf; Mosleh Al-Harthi; Medhat Osman. Developing and Applying a Model for Evaluating Risks Affecting Greening Existing Buildings. Sustainability 2021, 13, 6403 .

AMA Style

Usama Issa, Ibrahim Sharaky, Mamdooh Alwetaishi, Ashraf Balabel, Amal Shamseldin, Ahmed Abdelhafiz, Mohammed Al-Surf, Mosleh Al-Harthi, Medhat Osman. Developing and Applying a Model for Evaluating Risks Affecting Greening Existing Buildings. Sustainability. 2021; 13 (11):6403.

Chicago/Turabian Style

Usama Issa; Ibrahim Sharaky; Mamdooh Alwetaishi; Ashraf Balabel; Amal Shamseldin; Ahmed Abdelhafiz; Mohammed Al-Surf; Mosleh Al-Harthi; Medhat Osman. 2021. "Developing and Applying a Model for Evaluating Risks Affecting Greening Existing Buildings." Sustainability 13, no. 11: 6403.

Journal article
Published: 02 June 2021 in Sustainability
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In this study, the recycled concrete aggregates and powder (RCA and RCP) prepared from basaltic concrete waste were used to replace the natural aggregate (NA) and cement, respectively. The NA (coarse and fine) was replaced by the recycled aggregates with five percentages (0%, 20%, 40%, 60% and 80%). Consequently, the cement was replaced by the RCP with four percentages (0%, 5%, 10% and 20%). Cubes with 100 mm edge length were prepared for all tests. The compressive and tensile strengths (fcu and ftu) and water absorption (WA) were investigated for all mixes at different ages. Partial substitution of NA with recycled aggregate reduced the compressive strength with different percentages depending on the type and source of recycled aggregate. After 28 days, the maximum reduction in fcu value was 9.8% and 9.4% for mixtures with coarse RCA and fine RCA (FRCA), respectively. After 56 days, the mixes with 40% FRCA reached almost the same fcu value as the control mix (M0, 99.5%). Consequently, the compressive strengths of the mixes with 10% RCA at 28 and 56 days were 99.3 and 95.2%, respectively, compared to those of M0. The mixes integrated FRCA and RCP showed higher tensile strengths than the M0 at 56 d with a very small reduction at 28 d (max = 3.4%). Moreover, the fcu and ftu values increased for the late test ages, while the WA decreased.

ACS Style

Ibrahim Sharaky; Usama Issa; Mamdooh Alwetaishi; Ahmed Abdelhafiz; Amal Shamseldin; Mohammed Al-Surf; Mosleh Al-Harthi; Ashraf Balabel. Strength and Water Absorption of Sustainable Concrete Produced with Recycled Basaltic Concrete Aggregates and Powder. Sustainability 2021, 13, 6277 .

AMA Style

Ibrahim Sharaky, Usama Issa, Mamdooh Alwetaishi, Ahmed Abdelhafiz, Amal Shamseldin, Mohammed Al-Surf, Mosleh Al-Harthi, Ashraf Balabel. Strength and Water Absorption of Sustainable Concrete Produced with Recycled Basaltic Concrete Aggregates and Powder. Sustainability. 2021; 13 (11):6277.

Chicago/Turabian Style

Ibrahim Sharaky; Usama Issa; Mamdooh Alwetaishi; Ahmed Abdelhafiz; Amal Shamseldin; Mohammed Al-Surf; Mosleh Al-Harthi; Ashraf Balabel. 2021. "Strength and Water Absorption of Sustainable Concrete Produced with Recycled Basaltic Concrete Aggregates and Powder." Sustainability 13, no. 11: 6277.

Journal article
Published: 14 May 2021 in Journal of King Saud University - Engineering Sciences
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In this study, the main execution activities associated with global roadways construction projects (RCPs) were identified and categorized into five main activities of RCPs as follows: (A) Preliminary Preparations; (B) Earth works (cut/fill); (C) Implementing of sub-base and base layers; (D) Implementing of bituminous layers and (E) Traffic safety and road furniture. A field survey was conducted, and a comprehensive practical risk checklist consists of crucial 39 risk factors affecting RCPs activities in Egypt was introduced as a case study. The probability of occurrence and the impacts on RCPs objectives (time, cost, and quality) and the risk severity were determined while the key risk factors were highlighted. The correlations between the risk factors indices were measured and the strongest relationship was found between time and cost severities. The weights of time and cost percentages of each activity were identified as well as the expected percentages of time and cost overruns. Activity (B) had the highest percentages of execution time and associated cost among the whole activities i.e. 31% for time and 29% for cost. While the average overall time and cost overruns were found (15-20) % and (10-15) % respectively. The effect on the quality of each activity and the overall effect on the project’s final quality were also evaluated. The results indicated high effect on the quality of activities (A), (B) and (D) and moderate effect on activities (C) and (E). Furthermore, the influence on the overall quality of the entire project was found with high effect.

ACS Style

Usama H. Issa; Khaled Gamal Marouf; Hamdy B. Faheem. Analysis of risk factors affecting the main execution activities of roadways construction projects. Journal of King Saud University - Engineering Sciences 2021, 1 .

AMA Style

Usama H. Issa, Khaled Gamal Marouf, Hamdy B. Faheem. Analysis of risk factors affecting the main execution activities of roadways construction projects. Journal of King Saud University - Engineering Sciences. 2021; ():1.

Chicago/Turabian Style

Usama H. Issa; Khaled Gamal Marouf; Hamdy B. Faheem. 2021. "Analysis of risk factors affecting the main execution activities of roadways construction projects." Journal of King Saud University - Engineering Sciences , no. : 1.

Journal article
Published: 09 February 2021 in Risks
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Coronavirus disease 2019 (COVID-19) continues to spread rapidly all over the world challenging nearly all governments. The exact nature of COVID-19’s spread and risk factors for such a rapid spread are still imprecise as available data depend on confirmed cases only. This may result in an asymmetrically distributed burden among countries. There is an urgent need for developing a new technique or model to identify and analyze risk factors affecting such a spread. Fuzzy logic appears to be suitable for dealing with multi-risk groups with undefined data. The main purpose of this research was to develop a risk analysis model for COVID-19’s spread evaluation. Other objectives included identifying such risk factors aiming to find out reasons for such a fast spread. Nine risk groups were identified and 46 risk factors were categorized under these groups. The methodology in this study depended on identifying each risk factor by its probability of occurrence and its impact on viruses spreading. Many logical rules were used to support the proposed risk analysis model and represented the relation between probabilities and impacts as well as to connect other risk factors. The model was verified and applied in Saudi Arabia with further probable use in similar conditions. Based on the model results, it was found that (daily activities) and (home isolation) are considered groups with highest risk. On the other hand, many risk factors were categorized with high severity such as (poor social distance), (crowdedness) and (poor personal hygiene practices). It was demonstrated that the impact of COVID-19’s spread was found with a positive correlation with the risk factors’ impact, while there was no association between probability of occurrence and impact of the risk factors on COVID-19’s spread. Saudi Arabia’s quick actions have greatly reduced the impact of the risks affecting COVID-19’s spread. Finally, the new model can be applied easily in most countries to help decision makers in evaluating and controlling COVID-19’s spread.

ACS Style

Usama Issa; Ashraf Balabel; Mohammed Abdelhakeem; Medhat Osman. Developing a Risk Model for Assessment and Control of the Spread of COVID-19. Risks 2021, 9, 38 .

AMA Style

Usama Issa, Ashraf Balabel, Mohammed Abdelhakeem, Medhat Osman. Developing a Risk Model for Assessment and Control of the Spread of COVID-19. Risks. 2021; 9 (2):38.

Chicago/Turabian Style

Usama Issa; Ashraf Balabel; Mohammed Abdelhakeem; Medhat Osman. 2021. "Developing a Risk Model for Assessment and Control of the Spread of COVID-19." Risks 9, no. 2: 38.

Journal article
Published: 09 December 2020 in Sustainability
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Along with the global concern of the Environmental Assessment of Buildings, the Kingdom of Saudi Arabia (KSA) had recently used its system, Mostadam, to provide a suitable method to assess its buildings environmentally. Nevertheless, Mostadam still cannot be used for all Saudi Arabia regions without having misleading results, which is due to its various internal regions with their various characteristics. Taif city has its unique environmental characteristics, which affect all the environmental buildings’ assessment fields. This research aimed to adjust the Indoor Environmental Quality (IEQ) field of Mostadam according to Taif characteristics. The research analyzed Taif characteristics that have an impact on the IEQ field, which are mainly related to the occupants’ different comfort needs and health requirements. Then, according to an analytical methods, authors proposed some changes to adjust Mostadam IEQ field according to these characteristics. The research resulted in an obvious difference between the resulted IEQ items weights and formulation versus the origin one of Mostadam, which proves the need for such adjustment to achieve a fair and trusted assessment to achieve the utmost credible assessment results when assessing buildings environmentally in Taif. It is recommended to adjust other assessment fields similarly later on, and then globally.

ACS Style

Amal Shamseldin; Ashraf Balabel; Mamdooh Alwetaishi; Ahmed Abdelhafiz; Usama Issa; Ibrahim Sharaky; Mohamed Al-Surf; Mosleh Al-Harthi. Adjustment of the Indoor Environmental Quality Assessment Field for Taif City-Saudi Arabia. Sustainability 2020, 12, 10275 .

AMA Style

Amal Shamseldin, Ashraf Balabel, Mamdooh Alwetaishi, Ahmed Abdelhafiz, Usama Issa, Ibrahim Sharaky, Mohamed Al-Surf, Mosleh Al-Harthi. Adjustment of the Indoor Environmental Quality Assessment Field for Taif City-Saudi Arabia. Sustainability. 2020; 12 (24):10275.

Chicago/Turabian Style

Amal Shamseldin; Ashraf Balabel; Mamdooh Alwetaishi; Ahmed Abdelhafiz; Usama Issa; Ibrahim Sharaky; Mohamed Al-Surf; Mosleh Al-Harthi. 2020. "Adjustment of the Indoor Environmental Quality Assessment Field for Taif City-Saudi Arabia." Sustainability 12, no. 24: 10275.

Journal article
Published: 19 November 2020 in Sustainability
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The study investigated the level of thermal comfort in historical buildings located at a relatively high altitude in the Arabian Desert of Saudi Arabia. The study focused on the impact of the use of thermal mass and orientation on the level of thermal performance at Shubra and Boqri Palaces. Qualitative and quantitative analyses were used in this study, including a questionnaire interview with architecture experts living at the relatively high altitude of Taif city, to obtain data and information from local experts. The computer software TAS EDSL was used along with on-site equipment, such as thermal imaging cameras and data loggers, to observe the physical conditions of the building in terms of its thermal performance. The study revealed that the experts’ age and years of experience were important aspects while collecting data from them during the survey. The use of thermal mass had a slight impact on the indoor air temperature as well as the energy consumption, but it helped in providing thermal comfort. Use of ventilation can improve thermal comfort level. Evaporative cooling technique has a considerable impact on reducing indoor air temperature with 4 °C drop, improving the thermal comfort sensation level. The novelty of this work is that, it links the outcomes of qualitative results of experts with field monitoring as well as computer modelling. This can contribute as method to accurately collect data in similar case studies.

ACS Style

Mamdooh Alwetaishi; Ashraf Balabel; Ahmed Abdelhafiz; Usama Issa; Ibrahim Sharaky; Amal Shamseldin; Mohammed Al-Surf; Mosleh Al-Harthi; Mohamed Gadi. User Thermal Comfort in Historic Buildings: Evaluation of the Potential of Thermal Mass, Orientation, Evaporative Cooling and Ventilation. Sustainability 2020, 12, 9672 .

AMA Style

Mamdooh Alwetaishi, Ashraf Balabel, Ahmed Abdelhafiz, Usama Issa, Ibrahim Sharaky, Amal Shamseldin, Mohammed Al-Surf, Mosleh Al-Harthi, Mohamed Gadi. User Thermal Comfort in Historic Buildings: Evaluation of the Potential of Thermal Mass, Orientation, Evaporative Cooling and Ventilation. Sustainability. 2020; 12 (22):9672.

Chicago/Turabian Style

Mamdooh Alwetaishi; Ashraf Balabel; Ahmed Abdelhafiz; Usama Issa; Ibrahim Sharaky; Amal Shamseldin; Mohammed Al-Surf; Mosleh Al-Harthi; Mohamed Gadi. 2020. "User Thermal Comfort in Historic Buildings: Evaluation of the Potential of Thermal Mass, Orientation, Evaporative Cooling and Ventilation." Sustainability 12, no. 22: 9672.

Journal article
Published: 13 June 2020 in Structures
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The project selection problem has attracted significant attention among construction project participants. Typically, a contractor can execute one or more projects from available projects. This study introduces a new strategy to help contractors in evaluating and selecting suitable construction projects. The new strategy is based on identifying multiple criteria that affect construction projects as well as developing and using a model that supports decision based on the analytic hierarchy process. Furthermore, a fuzzy risk analysis model is proposed to analyze and quantify some of the identified criteria to help contractors select minimally risky projects. Market conditions, financial resources, project conditions, time delays, and cost overruns are five identified criteria that control the selection. Through identifying 70 subsidiary factors, the effects and importance of the first three criteria were determined through a field survey, while time delay and cost overrun criteria were analyzed and quantified through the risk analysis model. The new strategy was applied on a real case study comprising two HVAC system projects in the construction industry (project 1 in Egypt and project 2 in Saudi Arabia). Criteria and causes that yield different effects on the new strategy to support contractor decision and selection control are discussed in detail. Risk factors were ranked according to their importance, and their effects on both time and cost were clarified. The results obtained from the investigated case study showed 55.5% support for project 2, and only 44.5% support for project 1. This strategy is applicable to other case studies in different countries with different projects, criteria, and execution activities.

ACS Style

Usama Hamed Issa; Salah A.A. Mosaad; M. Salah Hassan. Evaluation and selection of construction projects based on risk analysis. Structures 2020, 27, 361 -370.

AMA Style

Usama Hamed Issa, Salah A.A. Mosaad, M. Salah Hassan. Evaluation and selection of construction projects based on risk analysis. Structures. 2020; 27 ():361-370.

Chicago/Turabian Style

Usama Hamed Issa; Salah A.A. Mosaad; M. Salah Hassan. 2020. "Evaluation and selection of construction projects based on risk analysis." Structures 27, no. : 361-370.

Journal article
Published: 09 April 2020 in JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
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The wastes in construction projects such as wastes in materials, time, resources and achieving customer needs can be minimized using the new philosophy of Lean Construction (LC). This paper proposed a two-level model based on fuzzy logic technique for evaluating Causes of Wastes (CWs) and lean implementation in construction projects. The probability of occurrence and importance of CWs were two input parameters in level 01 of the model, whereas the output was the level of waste. On the other hand, level 02 of the model depended on using three input parameters which were: level of waste, controllability level for CWs and lean implementation level, while the output was the lean effect. Several linguistic variables and logical rules were used for relating inputs and outputs and new indices were introduced. The model was applied and validated for data collected in two countries: Egypt and Kingdom of Saudi Arabia (KSA). Results demonstrated that the expected lean effect is found with a positive correlation with various levels of wastes and can be improved by increasing controllability and lean implementation levels. Regarding the comparative study between the two countries, distinct disparities in lean effect were clarified. Most measured CWs indices were different in both countries while indices values in KSA were higher than in Egypt either in waste, controllability or implementation levels. The results presented an optimum arrangement to reach an effective new lean evaluation model that could be implemented for moving the traditional construction towards LC. Finally, the model can be applied easily in most countries to help decision makers in evaluating CWs and lean implementation in their construction projects.

ACS Style

Usama Hamed Issa; Muwaffaq AlQurashi. A MODEL FOR EVALUATING CAUSES OF WASTES AND LEAN IMPLEMENTATION IN CONSTRUCTION PROJECTS. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 2020, 26, 331 -342.

AMA Style

Usama Hamed Issa, Muwaffaq AlQurashi. A MODEL FOR EVALUATING CAUSES OF WASTES AND LEAN IMPLEMENTATION IN CONSTRUCTION PROJECTS. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT. 2020; 26 (4):331-342.

Chicago/Turabian Style

Usama Hamed Issa; Muwaffaq AlQurashi. 2020. "A MODEL FOR EVALUATING CAUSES OF WASTES AND LEAN IMPLEMENTATION IN CONSTRUCTION PROJECTS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 26, no. 4: 331-342.

Journal article
Published: 01 January 2020 in International Journal of Scientific Research in Science, Engineering and Technology
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Construction projects in Egypt were typically influenced by multiple risk factors which have various impacts on both cost and time objectives that lead to project cost overruns and time delays. This paper presents the results of an investigation study concerns with the identification and assessment of risks associated with the Egyptian Non-Residential Buildings Projects (ENRBP). The study explores risk factors probability of occurrence and their effects on cost and time of these projects. A field survey was conducted with professionals in the construction projects in EGYPT for a purpose of collecting the required data of the risk factors characteristics. Based on results analysis, several risk factors were identified and categorized into fifteen risk groups as well as they were prioritized based on their effects on cost and time. A high agreement for ranking risk factors among contractors, consultants and owners was acquired. The list of the major risks included many factors such as: dramatic changes in the materials prices and Adopting direct attribution system rather than tendering and bidding systems. The most expected average increase of the cost overruns and time delays was more than 20% of the project planned budget and schedule. Finally, the analysis and findings showed that risk factors were very close in their impacts on both cost and time of ENRBP.

ACS Style

Medhat M. A. Osman; Usama Hamed Issa; Ayman M. Zakaria Eraqi. Identifying the Risk Impact on Cost and Time of the Egyptian Non-Residential Buildings Projects. International Journal of Scientific Research in Science, Engineering and Technology 2020, 01 -12.

AMA Style

Medhat M. A. Osman, Usama Hamed Issa, Ayman M. Zakaria Eraqi. Identifying the Risk Impact on Cost and Time of the Egyptian Non-Residential Buildings Projects. International Journal of Scientific Research in Science, Engineering and Technology. 2020; ():01-12.

Chicago/Turabian Style

Medhat M. A. Osman; Usama Hamed Issa; Ayman M. Zakaria Eraqi. 2020. "Identifying the Risk Impact on Cost and Time of the Egyptian Non-Residential Buildings Projects." International Journal of Scientific Research in Science, Engineering and Technology , no. : 01-12.

Journal article
Published: 22 November 2019 in International Journal of Scientific Research in Science, Engineering and Technology
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Developing informal settlements has become an important issue for improving urban structures in developing countries. An Informal Settlements Development Fund (ISDF) was presented to Egypt for supporting urban, economic, social and environmental plans. Development plans do not clearly take into account population priorities or satisfaction criteria. Furthermore, evaluating several alternatives was based on usual statistical methods that cannot deal with multiple criteria or complex problems, leading to imprecise results. Nowadays, adding value to the developed area, restoring cost, and studying social and economic plan impacts on the population, represent high priorities. In this study, a model concerns the optimal decision evaluation for multi-criteria in informal settlements development was proposed. Five clusters (criteria) were identified and included the efficiencies of urban structure, economic, social, and environmental, in addition to population satisfaction. Twenty one internal factors represented in nods were categorized under the five clusters and affecting proposed four alternatives. The model depended on the Analytic Network Process (ANP) technique which is used to support multi-criteria decision making. ANP was selected for its capability to deal with complex problems, create dependencies and feedbacks as well as use the relative weights of all interactions. This technique confirms a logical decision and accurate prediction amongst numerous alternatives. The model was validated and applied to an informal settlements area as a case study in Egypt. The results supported to use first alternative by 38.20%, while the ISDF results selected the third alternative. Moreover, the detailed analysis emphasized that the first alternative was more balanced between the social elements and the direct economic requirements of the population, while the third alternative tended to achieve restoring cost despite its negative social effects. Lastly, the proposed model can be used appropriately in similar cases to improve informal settlements.

ACS Style

Ayman M. Zakaria Eraqi; Usama Hamed Issa; Mary A. A. Elminiawy. Supporting a Decision for Informal Settlements Development using the Analytical Network Process. International Journal of Scientific Research in Science, Engineering and Technology 2019, 140 -153.

AMA Style

Ayman M. Zakaria Eraqi, Usama Hamed Issa, Mary A. A. Elminiawy. Supporting a Decision for Informal Settlements Development using the Analytical Network Process. International Journal of Scientific Research in Science, Engineering and Technology. 2019; ():140-153.

Chicago/Turabian Style

Ayman M. Zakaria Eraqi; Usama Hamed Issa; Mary A. A. Elminiawy. 2019. "Supporting a Decision for Informal Settlements Development using the Analytical Network Process." International Journal of Scientific Research in Science, Engineering and Technology , no. : 140-153.

Journal article
Published: 02 July 2019 in JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
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Cost overruns and time delays are considered to be very important challenges for the majority of construction projects. These challenges are typically attributed to their associated risks. Due to the risky and uncertain nature of construction projects, an increasing amount of attention is given to estimating and overcoming cost overruns and time delays. New techniques are being developed to help project managers to contractually complete projects within cost and time constraints. The objective of this study was to develop a new qualitative and quantitative risk analysis model that can be employed for construction projects. The proposed model, which is based on a fuzzy logic tool, consists of two modules for assessing risk factors that affect the main construction activities and computing the expected cost overruns and time delays that are associated with these risks. Using numerous logical rules, the model applies the probability of occurrences and impacts of the risks on the cost and time of the main activities. The Spearman and Kendall correlation coefficient tests are applied to verify and select a suitable membership function. Using four proposed membership functions, the results of these tests confirmed that the triangle membership function is suitable for the model. The model is verified by application to HVAC system activities in two actual construction projects, which serve as case studies. Two different methods are proposed and applied to quantify the cost overruns and time delays. The first method is based on determining the cost overruns and time delay values for each activity according to their weight in the system. Triple premise rules are proposed and applied in the second method, which is established to relate all activities. The results from the second method are more accurate compared with the first method based on actual data from the case study projects. In addition, the results demonstrated that the proposed model can be used to quantify the expected cost overrun and time delays in construction project activities and can be generalized and implemented in different construction activities.

ACS Style

Usama Hamed Issa; Salah Attia Mosaad; Mohamed Salah Hassan. A MODEL FOR EVALUATING THE RISK EFFECTS ON CONSTRUCTION PROJECT ACTIVITIES. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 2019, 25, 687 -699.

AMA Style

Usama Hamed Issa, Salah Attia Mosaad, Mohamed Salah Hassan. A MODEL FOR EVALUATING THE RISK EFFECTS ON CONSTRUCTION PROJECT ACTIVITIES. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT. 2019; 25 (7):687-699.

Chicago/Turabian Style

Usama Hamed Issa; Salah Attia Mosaad; Mohamed Salah Hassan. 2019. "A MODEL FOR EVALUATING THE RISK EFFECTS ON CONSTRUCTION PROJECT ACTIVITIES." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 25, no. 7: 687-699.

Journal article
Published: 08 February 2019 in Journal of Civil Engineering and Management
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This paper develops a model, introduced in software, namely Multi-Criteria Decision-Making Model (MCDMM). The model helps decision makers selecting the most suitable alternative based on the customer requirements and preferences. Analytic Hierarchy Process (AHP) and Fuzzy Technique for Order of Preference by Similarity to Ideal Solution (Fuzzy TOPSIS) form a package that covers most available data types in construction projects. In MCDMM, AHP produces criteria relative weights according to their influence on the discussed problem, while Fuzzy TOPSIS is applied to rank the available alternatives. The model consists of two modules, first one uses AHP only to deal with precise, qualitative alongside quantitative data, while the other module combines AHP with Fuzzy TOPSIS due to the importance of linguistic variables to cover undocumented data. MCDMM is verified using two real case studies. The model is applied to a real case project for constructing solar power plants at Saudi Arabia. A decision required to select the most suitable surveying technique for producing Digital Terrain Model (DTM) among four alternatives (Total Station, Remote Sensing, Photogrammetry, and Global Positioning Systems). This issue is studied and key points are identified for prioritizing among them. Total Station is selected based on the model results.

ACS Style

Usama Hamed Issa; Yehia Miky; Fam F. Abdel-Malak. A DECISION SUPPORT MODEL FOR CIVIL ENGINEERING PROJECTS BASED ON MULTI-CRITERIA AND VARIOUS DATA. Journal of Civil Engineering and Management 2019, 25, 100 -113.

AMA Style

Usama Hamed Issa, Yehia Miky, Fam F. Abdel-Malak. A DECISION SUPPORT MODEL FOR CIVIL ENGINEERING PROJECTS BASED ON MULTI-CRITERIA AND VARIOUS DATA. Journal of Civil Engineering and Management. 2019; 25 (2):100-113.

Chicago/Turabian Style

Usama Hamed Issa; Yehia Miky; Fam F. Abdel-Malak. 2019. "A DECISION SUPPORT MODEL FOR CIVIL ENGINEERING PROJECTS BASED ON MULTI-CRITERIA AND VARIOUS DATA." Journal of Civil Engineering and Management 25, no. 2: 100-113.

Journal article
Published: 01 March 2018 in Journal of Building Engineering
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S.A.A. Mosaad; Usama Hamed Issa; M. Salah Hassan. Risks affecting the delivery of HVAC systems: Identifying and analysis. Journal of Building Engineering 2018, 16, 20 -30.

AMA Style

S.A.A. Mosaad, Usama Hamed Issa, M. Salah Hassan. Risks affecting the delivery of HVAC systems: Identifying and analysis. Journal of Building Engineering. 2018; 16 ():20-30.

Chicago/Turabian Style

S.A.A. Mosaad; Usama Hamed Issa; M. Salah Hassan. 2018. "Risks affecting the delivery of HVAC systems: Identifying and analysis." Journal of Building Engineering 16, no. : 20-30.

Journal article
Published: 01 December 2017 in Beni-Suef University Journal of Basic and Applied Sciences
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Multi-Criteria Decision-Making (MCDM) techniques are found to be useful tools in project managersâ hands to overcome decision-making (DM) problems in Civil Engineering Projects (CEPs). The main contribution of this paper includes selecting and studying the popular MCDM techniques that uses different and wide ranges of data types in CEPs. A detailed study including advantages and pitfalls of using the Analytic Hierarchy Process (AHP) and Fuzzy Technique for Order of Preference by Similarity to Ideal Solution (Fuzzy TOPSIS) is introduced. Those two techniques are selected for the purpose of forming a package that covers most available data types in CEPs. The results indicated that AHP has a structure which simplifies complicated problems, while Fuzzy TOPSIS uses the advantages of linguistic variables to solve the issue of undocumented data and ill-defined problems. Furthermore, AHP is a simple technique that depends on pairwise comparisons of factors and natural attributes, beside it is preferable for widely spread hierarchies. On the other hand, Fuzzy TOPSIS needs more information but works well for the one-tier decision tree as well as it shows more flexibility to work in fuzzy environments. The two techniques have the facility to be integrated and combined in a new module to support most of the decisions required in CEPs. Keywords: Decision-making, AHP, Fuzzy TOPSIS, CBA, Civil Engineering Project

ACS Style

Fam F. Abdel-Malak; Usama Hamed Issa; Yehia Miky; Emad A. Osman. Applying decision-making techniques to Civil Engineering Projects. Beni-Suef University Journal of Basic and Applied Sciences 2017, 6, 326 -331.

AMA Style

Fam F. Abdel-Malak, Usama Hamed Issa, Yehia Miky, Emad A. Osman. Applying decision-making techniques to Civil Engineering Projects. Beni-Suef University Journal of Basic and Applied Sciences. 2017; 6 (4):326-331.

Chicago/Turabian Style

Fam F. Abdel-Malak; Usama Hamed Issa; Yehia Miky; Emad A. Osman. 2017. "Applying decision-making techniques to Civil Engineering Projects." Beni-Suef University Journal of Basic and Applied Sciences 6, no. 4: 326-331.

Journal article
Published: 01 December 2017 in International Journal of Sustainable Built Environment
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M. Alwetaishi; M. Gadi; Usama Hamed Issa. Reliance of building energy in various climatic regions using multi criteria. International Journal of Sustainable Built Environment 2017, 6, 555 -564.

AMA Style

M. Alwetaishi, M. Gadi, Usama Hamed Issa. Reliance of building energy in various climatic regions using multi criteria. International Journal of Sustainable Built Environment. 2017; 6 (2):555-564.

Chicago/Turabian Style

M. Alwetaishi; M. Gadi; Usama Hamed Issa. 2017. "Reliance of building energy in various climatic regions using multi criteria." International Journal of Sustainable Built Environment 6, no. 2: 555-564.

Conference paper
Published: 02 September 2015 in Proceedings of the 2015 (6th) International Conference on Engineering, Project, and Production Management
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ACS Style

Badr Alsulami; Usama Hamed Issa; Sherif Mohamed. Factors Governing Outsourcing Engineering Consultancy in Saudi Arabian Construction Industry. Proceedings of the 2015 (6th) International Conference on Engineering, Project, and Production Management 2015, 1 .

AMA Style

Badr Alsulami, Usama Hamed Issa, Sherif Mohamed. Factors Governing Outsourcing Engineering Consultancy in Saudi Arabian Construction Industry. Proceedings of the 2015 (6th) International Conference on Engineering, Project, and Production Management. 2015; ():1.

Chicago/Turabian Style

Badr Alsulami; Usama Hamed Issa; Sherif Mohamed. 2015. "Factors Governing Outsourcing Engineering Consultancy in Saudi Arabian Construction Industry." Proceedings of the 2015 (6th) International Conference on Engineering, Project, and Production Management , no. : 1.

Journal article
Published: 01 June 2014 in Soils and Foundations
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This study investigates the effect of the soaking condition in a wet environment on the stability and durability of soft clay soil treated with recycled gypsum. Cement and lime are the two types of solidification agents used to improve the durability of the clay–gypsum mixture and to reduce the solubility of the gypsum in a wet environment because gypsum is soluble in water. The recycled gypsum was mixed with cement and lime in different ratios in the dry state, and different amounts of admixtures were mixed with the tested soil to explore the effect of the wet environment on the stability and durability of the stabilised gypsum–clay soil. Cylindrical stabilised soil specimens were cured for 3, 7, and 28 days and then soaked in water for different intervals up to 60 days. The soaked samples were evaluated based on the compressive strength, durability index, deformation changes, soil deterioration, and water absorption. The results show that increasing the content of both types of admixtures had a positive effect on the improvement of stability and durability for the tested soil in a wet environment, while the increase in the admixture ratio had a slightly negative effect on both the stability and the durability of the samples subjected to soaking. Short soaking times, up to 15 days, had a negative effect on the stability, durability, and changes in volume, and brought about a deterioration in the soluble soil and the water absorption compared with longer soaking times. The short curing times of 3 and 7 days exhibited a positive effect on the improvement of the stability, strength, and durability for the stabilised specimens subjected to soaking compared with the longer curing time of 28 days. Increasing the admixture content and soaking time had a significant effect on the water absorption and the soil deterioration of the tested soil. The effect of the soaking condition on the volume changes for the soil stabilised with the two admixtures was found to be insignificant, because the maximum volume change was found to be less than 0.15%

ACS Style

Aly Ahmed; Usama Hamed Issa. Stability of soft clay soil stabilised with recycled gypsum in a wet environment. Soils and Foundations 2014, 54, 405 -416.

AMA Style

Aly Ahmed, Usama Hamed Issa. Stability of soft clay soil stabilised with recycled gypsum in a wet environment. Soils and Foundations. 2014; 54 (3):405-416.

Chicago/Turabian Style

Aly Ahmed; Usama Hamed Issa. 2014. "Stability of soft clay soil stabilised with recycled gypsum in a wet environment." Soils and Foundations 54, no. 3: 405-416.

Journal article
Published: 01 December 2013 in Alexandria Engineering Journal
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The construction projects involve various risk factors which have various impacts on time objective that may lead to time-overrun. This study suggests and applies a new technique for minimizing risk factors effect on time using lean construction principles. The lean construction is implemented in this study using the last planner system through execution of an industrial project in Egypt. Evaluating the effect of using the new tool is described in terms of two measurements: Percent Expected Time-overrun (PET) and Percent Plan Completed (PPC). The most important risk factors are identified and assessed, while PET is quantified at the project start and during the project execution using a model for time-overrun quantification. The results showed that total project time is reduced by 15.57% due to decreasing PET values, while PPC values improved. This is due to minimizing and mitigating the effect of most of the risk factors in this project due to implementing lean construction techniques. The results proved that the quantification model is suitable for evaluating the effect of using lean construction techniques. In addition, the results showed that average value of PET due to factors affected by lean techniques represents 67% from PET values due to all minimized risk factors

ACS Style

Usama Hamed Issa. Implementation of lean construction techniques for minimizing the risks effect on project construction time. Alexandria Engineering Journal 2013, 52, 697 -704.

AMA Style

Usama Hamed Issa. Implementation of lean construction techniques for minimizing the risks effect on project construction time. Alexandria Engineering Journal. 2013; 52 (4):697-704.

Chicago/Turabian Style

Usama Hamed Issa. 2013. "Implementation of lean construction techniques for minimizing the risks effect on project construction time." Alexandria Engineering Journal 52, no. 4: 697-704.