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The United States has invested heavily in water and wastewater infrastructure projects to address growing demand and aging systems. To ensure the effective delivery of these projects, agencies are shifting toward alternative delivery methods such as progressive design build (PDB), which has demonstrated accelerated schedule and enhanced cost performance across the literature as well as multiple projects compared to traditional DB. This has raised a need for evaluating PDB's state of adoption and performance in the water and wastewater sector. To this end, the authors: (1) conducted descriptive and statistical analyses of the 21 PDB water and wastewater projects available on the Design-Build Institute of America database evaluating their characteristics and performance metrics; (2) investigated the frequency of materialized risks impacting schedule and cost in these projects; and finally (3) identified the key adoption drivers and challenges for PDB in the water and wastewater sector by triangulating findings from the studied narratives with a literature and practice review. Results revealed that 71% and 57% of the investigated projects were completed on or before the contracted schedules and costs, respectively. From the studied project narratives, owner-led changes and COVID-19 impacts were the most frequently encountered risks. Also, it was shown that project planning and risk management drivers were the most influential causes for PDB adoption, whereas legal and contractual restrictions as well as the owner's mindset and culture-related concerns were the most pressing challenges. This study contributes to the body of knowledge by delivering managerial insights through an aggregated snapshot of PDB implementation in the water and wastewater sector. Ultimately, the provided managerial insights can assist stakeholders in making better-informed decisions by weighing the advantages and challenges of PDB identified in this research against more traditional delivery approaches. [ABSTRACT FROM AUTHOR]

This paper investigates the ethical and professional responsibilities of engineering Graduate Students (GSs) and Faculty Members (FMs) in relation to Graduate Recruitment Offers (GROs). The authors developed an academic survey for data collection and subsequently evaluated the collected data based on common ethical theories and principles, as well as relevant professional codes of conduct. Based on the survey responses, this study identified the most common driving and preventive reasons for FMs and GSs not to honor a signed GRO. Further, the perception of GSs and FMs in relation to GROs was investigated using statistical methods. Finally, the authors provided an educational framework in the form of a checklist aimed at promoting ethical and professional decision-making as related to GROs. Ultimately, the outcomes of this research can be incorporated into senior seminar courses to enhance engineering undergraduate students' ethical education and promote their ethical thinking as they grow into professional roles. [ABSTRACT FROM AUTHOR]

Celebrating Construction Management and Economics's (CME) 40th anniversary, the goal of this paper is to investigate the knowledge structure and evolution of research trends in CME since its inception. The associated objectives include: (1) analyzing CME's scholarly characteristics; (2) studying CME's publication output over time; (3) examining interconnectivities between CME's research trends; and (4) exploring the potential citation impact of recently published CME's papers. In doing so, this paper implemented a multistep methodology that consists of descriptive assessment, social network analysis (SNA), and predictive machine learning (ML). Results of descriptive assessment showed that CME has witnessed over the years a noticeable growth in the number of publications, citation trends, and collaborative research as depicted increased co-authorship, and that highest percentage of publications were related to "Strategy, Decision Making, Risk, and Finance", "Project planning and Design" and "Contemporary Issues". Output of SNA highlights that research areas with the highest interconnectivity included "Strategy, Decision Making, Risk and Finance" and "Project Planning and Design", and "Labor and Personnel Issues". Furthermore, predictive ML revealed that CME papers have a high probability of becoming high impact publications. In addition to that, the predictive ML results re-emphasized the outcomes of the performed descriptive assessment by reflecting the importance of "Contemporary Issues", "Organizational Issues", "Strategy, Decision Making, Risk, and Finance", and "Labor and Personnel Issues" as emerging research topics with increased potential impact in the future. Ultimately, this paper benefits all CME stakeholders by quantitatively studying current research patterns, their interconnectivities, and future potential. [ABSTRACT FROM AUTHOR]