Pongpeng, Jakrapong

Preferred name

Pongpeng, Jakrapong

Main Affiliation

School of Engineering

jakrapong.po@kmitl.ac.th

Now showing 1 - 10 of 10

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Structural equation model for construction equipment selection and contractor competitive advantages
(2016-01-01)
Samee, Kattiya
;
Pongpeng, Jakrapong
The selection and use of appropriate construction equipment contributes to operational efficiency and contractor competitive advantages. However, numerous factors are involved in the selection of suitable construction equipment. A review of the existing literature revealed a lack of research on the causal relationships between construction equipment selection factors and contractor competitive advantages. Therefore, this study attempted to identify the selection factors through a survey of contractors’ opinions on the levels of importance of the factors that are relevant to construction equipment selection and competitive advantages. The survey data were analyzed using Structural Equation Modeling (SEM). The results suggest the following six major selection factors and their respective weights of relative importance: compatibility with site characteristics (25%), services and maintenance (19%), costs (15%), safety and environmental effects (14%), ease of acquisition (14%), and technology and innovation (13%). These selection factors influence contractor competitive advantages in terms of financial stability, corporate image and reputation, bidding opportunity, and technical capacity, and their weights of relative importance are 31%, 25%, 22%, and 22%, respectively. The findings of this study shed light on the causal relationships between the selection of appropriate construction equipment and contractor competitive advantages.
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Causes of construction delay from contractors and suppliers in Thailand's oil and gas platform projects
(2018-08-14)
Gomarn, Pittayaporn
;
Pongpeng, Jakrapong
Construction project delays caused by contractors and suppliers are the top problems in Thailand's oil and gas industries. Recognizing this importance and their relationships between factors can help reduce the risk of delays in construction projects. Therefore, this study set out to confirm factors and inspect relationships between delay factors of contractors and suppliers. A 16 item questionnaire survey was distributed to 134 managers, engineers, and supervisors in oil and gas platform construction projects in Thailand. A confirmatory factor analysis (CFA) was performed by the use of Amos Version 20 software program. The analysis results showed that delays caused by the contractors and suppliers had high relationships, due to high regression weighs. The delays caused by the contractors included seven factors which included poor site management and supervision (17%), lack of safety rules and regulations (16%), poor communication and coordination with others (15%), poor procurement system management (15%), defective components and mistakes during construction (14%), supplier payments lateness (13%), and poor planning and scheduling (10%). The delays caused by the suppliers included six factors which included the supply of unqualified and unskilled personnel (22%), supply of low efficiency equipment (20%), late delivery of materials and equipment (20%), supply of low quality materials (16%), late supply of workers (16%), and price escalation (5%).
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A comparison of green building assessment systems
(2018-08-14)
Krajangsri, Thanachon
;
Pongpeng, Jakrapong
Construction is one of industries that have negative impacts on the environment. Relevant organizations both in Thailand and other countries have been trying to minimize these impacts. Developing green building assessment systems is one of efforts in reducing environmental impacts and using natural resources efficiently. Currently, there are many green building assessment systems with different objectives and assessment scopes in some details. This could cause some confusion in selecting the suitable system for the project in accordance with its environmental, social and economical contexts. This study was aimed to compare and provide overview and components of these systems. The comparison results can be used as a guideline for further development of green building assessment systems. It is found that most major green building assessment systems still concern only environmental issues while newly developed systems have included social and economic issues in their criteria. Furthermore, the system which is developed in one environment could not be used with full capabilities in another. This will lead to more research in developing the assessment system that is more comprehensive and adaptable enough to be used effectively in various environment.
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Sustainable Infrastructure Assessment Model: An Application to Road Projects
(2019-03-01)
Krajangsri, Thanachon
;
Pongpeng, Jakrapong
Sustainable infrastructure assessment models play an important role in sustainable development. However, the current infrastructure assessment models for road projects have several limitations; specifically, all the models do not support the involvement of various stakeholders. Most models do not consider the risk arising from uncertainty in the assessment, and are not flexible regarding changes needed for local project contexts. Accordingly, this study aims to develop a sustainable infrastructure assessment model that overcomes these limitations, which is the distinct contribution of this study. A utility function is used to address the risk, and the stakeholders’ involvement is taken into account by a social welfare function. To provide flexibility for changes, the model is programmed using Visual Basic for Application for interactive activities with stakeholders (as assessors) and Microsoft Excel for calculation activities. The model includes four phases: 1) assessor weight selection, 2) assessment criteria and weight selection, 3) sustainable infrastructure assessment, and 4) sustainability assessment report. The model was verified and validated with four actual road projects, and acceptable results were obtained. Thus, the proposed model, which reflects reality more accurately than other available sustainable infrastructure assessment models, can assist stakeholders by reducing the time and effort required for assessing the sustainability of road projects.
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Relationships of construction project manager, engineer, and foreman skills
(2019-10-25)
Kawesittisankhun, Kittipos
;
Pongpeng, Jakrapong
Understanding the relationships of construction project manager, engineer and foreman skills can be used by contractors to develop project performance. Although there are widely discussed on construction individual skills, the relationships between individual skills having on others' skills have not been examined in previous studies. Thus, this study examined such relationships. The questionnaire was used to collect data on the important range of skills of the individual to evaluate the relationships among them. The data were then analyzed using structural equation modelling (SEM) to determine the relationships of construction manager, engineer and foreman skills. The final SEM model shows regression weights in parenthesis that construction manager skills have influence on engineer skills (0.65) and engineer skills have influence on foreman skills (0.84). Additionally, the regression weight presents that knowledge management is the most important skill for a construction manager (0.64). Problem-solving is the most important to engineer (0.59). Regarding foreman, physical skill is the most important (0.67). The findings can be used as a guideline for contractors in developing their staffs to increase project performance.
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Effect of Sustainable Infrastructure Assessments on Construction Project Success Using Structural Equation Modeling
(2017-05-01)
Krajangsri, Thanachon
;
Pongpeng, Jakrapong
Sustainable infrastructure assessments can be used by the construction industry to develop sustainable infrastructure projects and achieve successful construction projects. However, the effect of sustainable infrastructure assessments on the success of construction projects has not been examined in previous studies, based on the authors' knowledge; therefore, this study examined this effect. A questionnaire was used to collect data on the importance of a range of criteria used to evaluate sustainable infrastructure assessments and construction project success. The data were then analyzed using structural equation modeling (SEM) to validate a structural model used to determine the effect of sustainable infrastructure assessments. The final SEM model shows the following: (1) sustainable infrastructure assessments can be described by eight criteria (i.e., environmental impacts on surrounding areas, transport, community, energy and water, location, project management, waste management, and materials and resources); (2) construction project success can be described by six criteria (i.e., environment, quality, safety, time, cost, and client satisfaction); and (3) sustainable infrastructure assessments directly affect construction project success (regression weight of 0.83). The results of this research inform how sustainable infrastructure assessments affect construction project success and could be used as a guideline for developing sustainable infrastructure projects.
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The role of infrastructure sustainability and success of construction projects on owner benefits
(2018-08-14)
Krajangsri, Thanachon
;
Pongpeng, Jakrapong
The infrastructure sustainability and success of construction projects likely influence owner benefits. However, these influences have rarely been examined. Thus, the research aimed to examine such influences and intervening behavior of the success of construction projects between the sustainability of infrastructure and owner benefits using structural equation modeling (SEM). The study finds that there are a direct influence of the sustainability of infrastructure on owner benefits (regression weight: 0.63) and an indirect direct influence of that (regression weight: 0.22) through the intervening role of the success of construction projects. The findings ensure that implementation of infrastructure sustainability projects can enhance the success of construction projects and owner benefits.
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Construction project team's competencies influencing contractor business competencies
(2019-10-25)
Kawesittisankhun, Kittipos
;
Pongpeng, Jakrapong
Consistent arrangement of contractor business competencies and project team's competencies helps improve project operation efficiency. Key participants in the project team are project managers, engineers, and technicians. However, a review of existing literature reveals a lack of research on the causal relationship between project teams' competencies and business competencies. Therefore, this study attempted to identify the relationship through survey contractors' opinions. The data were analyzed using structural equation modeling (SEM). The results suggest the regression weighs presented in parenthesis that business competencies are influenced by the competencies of a project manager (0.50) and engineer (0.49). The study also discovered the influence of competencies among project teams; that is, technician competencies influence engineer competencies (0.87), and engineer competencies influence project manager competencies (0.55). With the causal relationship between the project team's competencies and business competencies, contractors can suitably allocate human resources for increasing their project operation efficiency.
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Project failure Indicators: Perceptions of Thai and Malaysian engineers
(2018-08-14)
Gomarn, Pittayaporn
;
Pongpeng, Jakrapong
This research aims to compare the rank and importance level of failure indicators of the construction projects from the perception of Thai and Malaysian engineers. The questionnaire was used to survey the opinions of the engineers who supervised construction projects in Bangkok, Thailand and Kuala Lumpur, Malaysia. Analysis of the data was undertaken with the use of SPSS software which included a comparison of the importance level of construction project failure indicators from the perception of Thai and Malaysian engineers. Additionally, the Mann Whitney U test was used to compare the similarities and differences of construction project failure indicators from the perceptions of both Thai and Malaysian engineers. The results showed that construction project failure indicators from both Thai and Malaysian engineers were similar. Failure indicators ranked in importance were: 1) negative effects on safety, health and environment (18.83%), 2) cost overrun (18.44%), 3) time overruns (17.41%), 4) quality defects (16.43%), 5) stakeholders' dissatisfaction (15.36%), and 6) dispute and litigation (13.54%). The outcome of the research is therefore useful in assisting supervisory staff better understand project failure indicators. In addition, the research can be used as a guideline for analyzing the risk of failures in construction projects.
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Structural equation model for construction equipment management affecting project and corporate performance
(2016-07-01)
Samee, Kattiya
;
Pongpeng, Jakrapong
Construction equipment management by contractors demonstrates investment efficiency and service performance, which can affect the construction project and corporate performance. Although many studies have considered the components of construction equipment management, project performance and corporate performance, the causal relationships among these components have not been explored to date. This study explores these relationships. The research method included the collection of contractors’ opinions regarding the importance of these factors. Structural Equation Modeling (SEM) was employed to determine the causal relationships among the data. The results indicate four factors of construction equipment management, with their weights of relative importance, affect project and corporate performance. Selection management exhibits the greatest effect (33%); this is followed by operations management (27%), maintenance and repair management (25%), and retirement and replacement management (15%). Regarding the factors for measuring project performance, the quality and time factors were ranked first and second in importance, respectively. The customer factor was the most important factor for describing corporate performance. The findings of this study enable a greater understanding of these causal relationships, providing a starting point for improving the project and corporate procedures of equipment management.

Pongpeng, Jakrapong

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