<p>An increasing number of AEC firms are positioning themselves to expand operations in the international construction market. To undertake such decisions, it is critical for companies to analyze the risks, benefits, and future market potential of the host country. Further, companies typically select appropriate entry modes and develop business strategies to navigate the complex formal and informal institutions of the host country. The Board of directors and upper-management employees are typically involved in making such decisions. Previous researchers have identified various risks such as the political, financial, supply-chain using tools like the International Construction Risk Assessment Model (ICRAM) and the International Project Risk Assessment (IPRA). Such comprehensive models encompass various risk factors at the country, market, and project levels. At each level, data are to be collected from various sources that could be susceptible to political agenda, bias, and inaccessibility. Research findings suggest that the results provided by such models heavily rely on the credibility of the information and the information source.</p><p>First, this research provides comprehensive definitions for Information and Source Credibility with respect to the international construction decision-making domain. Second, the research proposes a framework to assist decision-makers in evaluating Information and Source credibility to rank and prioritize their sources. This research has identified (a) 5 Criteria and 20 Metrics for Information Credibility and (b) 3 Criteria and 18 Metrics for Source Credibility. Third, a survey of construction industry professionals was carried out to determine the relevancy and relative importance of the identified criteria and metrics with respect to international construction decisions. The collected survey responses have a Cronbach’s Alpha value of 0.89 which indicates that the responses are reliable for further analysis. A one-way ANOVA test was conducted to investigate the influence of the prior credibility evaluation experience of the respondents on the relative weights for the framework. The results indicate that prior evaluation experience does not significantly affect the perception of the users towards selecting and weighing the criteria and metrics.</p><p>Finally, a multi-criteria decision-making (MCDM) model is proposed to incorporate the proposed credibility evaluation framework with the relative weights of the criteria and metrics. An Excel-based macro-enabled tool (with a user-friendly interface) is developed to accept user inputs associated with their information and sources. A well-defined scale of measurement is developed to reduce the subjectivity and biases involved in making such abstract assessments. Final scores, Cr_Information and Cr_Source, are calculated for every piece of information and source selected by the user. The MCDM results are expected to assist users in determining the undertaking of robust decisions by incorporating one additional layer of determining the credibility of their information and prioritizing their information sources. The suggested point of application for this research is before Financial Investment Decision (pre-FID) stage to ensure sufficient time for all the stakeholders to reevaluate their FIDs.</p>

In an effort to free up valuable storage space, an obsolete dual tube furnace facility was repurposed to process legacy and newly generated reaction by-products for reuse and/or evaluation. These materials consist of magnesium oxide and unreacted chemicals including small amounts of uranium. They will be converted to their safest form. The repurposing of the facility was not a simple undertaking as all of the utilities with the exception of electricity were disconnected from the facility and the furnaces were more than 50 years old. A 2-part project consisting of a construction phase and transition to operations phase was initiated to accomplish the task. Because funding was done in a piecemeal fashion, the dynamics of restarting the facility was accomplished using creative project management. Lessons learned will provide invaluable information for future sustainability endeavors that require the renovation of an out-service facility to meet current and future needs.

This thesis presents a framework to conduct a quantity take-off (QTO) and cost estimate within the Building Information Modeling (BIM) Environment. The product of this framework is a model-based cost estimating tool. The framework addresses the cost uncertainty associated with the detailed information defining BIM model element properties. This cost uncertainty is due to the lack of available tools that address detailed QTO and cost estimation using solely a BIM platform. In addition, cost estimators have little experience in leveraging and managing information within semantic-rich BIM models. Unmanaged BIM element parameters are considered a source of uncertainty in a model-based cost estimate, therefore they should be managed and quantified as work items. A model-based system, which assists the estimators to conduct a QTO and cost estimate within the BIM environment, is developed. This system harnesses BIM element parameters to drive work items associated with the parameter’s host element. The system also captures the cost of scope not modeled in the design team’s BIM models. The system consists of four modules 1) establishing estimate requirements, 2) planning and structuring the estimate, 3) quantification and costing, and 4) model-based historical cost data collection. The complete system can produce a project cost estimate based on the 3D BIM Model. This framework is supported by a computation engine built within an existing virtual design and construction (VDC) model review software. The computation engine supports BIM authoring and reviewing BIM data. The Framework’s quantification and costing module was compared to existing methods in a case study. The outcomes of the model-based system demonstrated improved cost estimate accuracy in comparison to the BIM QTO method and improved speed compared to the traditional methods. The framework provides a systematic workflow for conducting a detailed cost estimate leveraging the parameters stored in the BIM models.

Various industries are using personality profile assessments as tools to help reduce employee turnover. Employee turnover is a continuing challenge in the construction industry that has negative effects on construction companies. Research found that it was difficult to know if companies in the construction industry are using personality profile assessments as a tool to help reduce employee turnover. After understanding that other industries were using personality profile assessments in their hiring, promoting, team building and leadership development to reduce turnover, it was desired to understand if the construction industry was doing the same. This research performed a survey among the top construction companies to understand if construction companies were using assessments, and if it had any effect on the turnover of those companies. The survey results provided information on the amount of companies using personality profile assessments, as well as additional insights and attitudes among these companies, whether they used assessments or not. The results of this survey and research have provided strong indicators that personality profile assessments are tools that will help construction companies reduce employee turnover.

IEEE 802.11 wireless networking equipment has made it possible to bridge the last mile for new broadband internet service providers. Inexpensive wireless networking equipment and high gain antennas enable high speed internet delivery at a fraction of the cost of installing or upgrading land lines for cable or DSL services. Based on this research, a guide of general practices and procedures is proposed for designing, installing, and maintaining a reliable wireless community area network. Included tests have provided performance results for several types of wireless antennas (including wire grid parabolic dishes, Yagi and Vagi styles, and echo backfire), wireless bridges, and other factors which influence overall signal strength and throughput. Two separate configurations are recommended. The first configuration is based on high reliability, longer distances, and low error rates. The second recommendation is based on lower overall cost, ease of installation, and shorter link distances.

The purpose of this research was to use the Transvalor S.A. product, Forge3, to develop a finite element simulation of the friction stir welding process that improves the predictability of temperature evolution and material flow within the plunge portion of the process. Previous modeling created more heating within the billet than experimental results, probably due to the simplification of the simulation with adiabatic boundary conditions. More realistic tooling temperatures were included in this model as these affect heat evolution which is a determining factor in microcrystalline growth. These results were validated by experimental efforts using a billet and tooling instrumented with thermocouples used to evaluate the temperatures at specific locations over time. Simulation results were compared with previous experiments to validate the predicted material flow.

The main topic in the licensing debate is whether licensing affects construction quality. Available literature and previous studies indicate that it does not. The real question is not whether licensing improves quality, but whether the improving quality is the actual purpose of licensing. There is little information available on the purpose of licensing as defined by state licensing departments as well as a general lack of information on how states evaluate whether licensing is fulfilling the intended purpose. In order to effectively resolve some of the issues surrounding the construction licensing debate, the true purpose of licensing and the methods used to evaluate licensing must be defined by state licensing departments, not the industry. The sharing of such information could lead to better construction regulations, improved evaluation techniques, further research, and ultimately, a resolution of the licensing debate. State licensing departments indicated the purpose of licensing as well as methods of evaluating licensing currently used by state licensing departments. Contrary to popular thought, the true purpose of residential general contractor licensing (as defined by state licensing departments) is not to improve construction quality but to protect the consumer's health and life. The license debate will continue as long as there exists a discrepancy between what the industry thinks is the purpose of licensing (improve quality) and what the purpose truly is (protect the consumer). If the main purpose of licensing is, as the states expressed, to protect the consumer, then policy must reflect that idea. Protecting the consumer can be accomplished through mandatory building code inspections without a barrier to entry such as licensing. The information gained from the study provides a foundation for further research on licensing issues that will benefit the construction industry, the economy, and society alike.

The material removal process uses cutting tools in order to produce the desired shape of the workpiece. Tool wear has been a problem for cutting tools, since cutting tools wear and break. Research has been accomplished in the tool wear field for tool life and more recently tool wear. The computer generation has created a method to simulate the material removal process. These computer simulations model the cutting tool reaction with the workpiece. Many of the simulation models use finite element analysis to calculate the reaction of the cutting tool. Different finite element models are being used throughout the world for research. This thesis used an updated Lagrangian model in conjunction with Archard's law to predict the wear of the cutting tool. This research used experimental data to correlate with simulation data to see whether or not Archard's law was a good approximation for tool wear. The research used different side rake angles and cutting surface speed to test the simulation. Shear angle, contact length, cutting ratio, and force are used to provide output values to compare the experimental and computer simulation data. The comparative results showed good trends between the experimental and computer simulation data in every comparison. The results also showed a good approximation for the force and contact length values. Archard's law can be used to model wear on cutting tools with further research.

In this study a service-learning project was conducted with secondary students in a construction technology based course. Three research questions were considered; (1) does service learning projects help to engage student participation, (2) can students learn the course curriculum while participating in a service learning project, and (3) is there a correlation between student participation and student learning as it pertains to service learning projects? The data was collected through surveys, observations, interviews, and evaluations. The researcher concluded the following from the study; 92% of the students were actively participating in the two week service project, 76% of the students learned the curriculum for the unit in a satisfactory manner, and it was determined that there is a significant correlation between students participation or commitment to the service learning project with how well the students learned the curriculum for that unit.

The filament-winding process produces quality consistent composite parts for many industries. Filament winding allows for consistent quality parts by automating the winding process. A recent development of filament winding is the Lotus process. The Lotus process reverses conventional filament winding by leaving the mandrel stationary and winding composite fiber around the mandrel. The automated Lotus filament-winding machine is controlled by four-axis control manipulating the Lotus ring around a fixed mandrel. This allows Lotus filament winding to wind parts that do not have a linear axis. Lotus filament winding is in its early stages of development. As a second step in the development of Lotus filament winding a method of automatic part-to-machine manipulation has been developed. Parts wound on the new automatic-manipulated Lotus machine have comparable quality and appearance to those made by conventional winding.