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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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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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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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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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