Ethnographic Theory-Building Research in Construction

Traditional construction research methods have enabled focused but narrow advances in our understanding of industry phenomena. While contributing new insight, these methods are often not adequate to enable understanding of the complex interactions that lead to many of the industry’s pervasive social and technical problems. One means of addressing these limitations is for the construction research community to complement prevalent quantitative and case study methodologies with qualitative theory-building methodologies, specifically ethnographic studies or those based on detailed and long-term observation of project environments. This paper identifies the critical need for theory-building methods and their methodological conventions, challenges, and opportunities. Specifically, the paper focuses on data collection in ethnographic studies and analysis of that data through the use of grounded theory. Through better understanding and more widespread use of theory-building methods, the construction research community can provide a needed complement to the current prevailing methods and greatly aid the maturation of our important field.     

Integrating qualitative and quantitative methods in the study of developmental psychopathology in context

Qualitative methods are well suited to advance the understanding of the role of social context in the development of maladaptation and psychopathology. However, they have not been widely used by developmental psychopathologists, despite being utilized in related fields, particularly in the sociological study of crime and delinquency. This article assesses the potential for the increased use of qualitative methods in developmental psychopathology and addresses the challenges involved in integrating them with quantitative research strategies. The interplay of qualitative and quantitative methods in the study of juvenile delinquency is reviewed for relevant lessons about both the utility and the difficulties of integrating the two types of methods. The problem of assessing continuities and discontinuities over the life course in patterns of antisocial behavior is discussed as an example of the challenge of integrating methodological paradigms. Schools of thought about qualitative methods and their relationship to quantitative research paradigms are identified and compared. Examples are discussed of narrative life history interviewing and qualitative observational techniques and of recent research endeavors integrating these qualitative techniques with quantitative data analyses.     

Research Validation: Challenges and Opportunities in the Construction Domain

Validation of the research methodology and its results is a fundamental element of the process of scholarly endeavor. Approaches used for construction engineering and management research have included experiments, surveys and observational studies, modeling and simulation, theory building, case studies, and various subtypes thereof. Some studies use more than one approach. A particular contribution of this paper is that it reviews different types of validation using examples of studies, analyzes the specific challenges that were found to be significant, and presents how they were successfully overcome in each case. Another contribution is that it describes new opportunities for research validation that are emerging at the horizon as well as ongoing collaborative efforts to enhance the access of construction researchers to validation tools. This paper increases the awareness of the paramount role that validation techniques play in scholarly work by providing readers with recommendations to properly validate their own research efforts.     

Structural Equation Model of Construction Contract Dispute Potential

This paper presents the results of a structural equation model (SEM) for describing and quantifying the fundamental factors that affect contract disputes between owners and contractors in the construction industry. Through this example, the potential impact of SEM analysis in construction engineering and management research is illustrated. The purpose of the specific model developed in this research is to explain how and why contract related construction problems occur. This study builds upon earlier work, which developed a disputes potential index, and the likelihood of construction disputes was modeled using logistic regression. In this earlier study, questionnaires were completed on 159 construction projects, which measured both qualitative and quantitative aspects of contract disputes, management ability, financial planning, risk allocation, and project scope definition for both owners and contractors. The SEM approach offers several advantages over the previously employed logistic regression methodology. The final set of structural equations provides insight into the interaction of the variables that was not apparent in the original logistic regression modeling methodology.     

Ocular hypotensive effect of topical ketanserin in timolol users

This paper discusses some of the underlying reasons why health researchers have historically had difficulty working collaboratively across qualitative and quantitative research paradigms and argues why it is imperative that researchers move beyond traditional adherence to particular methods of inquiry. Chronic illnesses are prime examples of conditions that by their very nature need to be studied from a combination of perspectives, using both qualitative and quantitative methods. We suggest that the success of health research on managing these conditions lies in the shared application of both qualitative and quantitative research perspectives, methods and tools. In addition, we argue that effective research into long-term chronic illnesses requires not only combined research efforts but also longitudinal programs of study, so that the experience of managing chronic conditions can be captured over time.     

Impact of Shift Work on Labor Productivity for Labor Intensive Contractor

Generally, a contractor has three options in accelerating a construction schedule: working longer hours, increasing the number of workers, or creating an additional shift of workers. There has been a significant amount of research conducted on scheduled overtime on construction labor productivity. However, little information has been found in the literature addressing the labor inefficiency associated with working a second shift. This paper has qualitative and quantitative components. The qualitative part details why and how shift work affects labor productivity, and then addresses the appropriate use of shift work. The quantitative component determines the relationship between the length of shift work and labor efficiency. The results of the research show that shift work has the potential to be both beneficial and detrimental to the productivity of construction labor. Small amounts of well-organized shift work can serve as a very effective response to schedule compression. The productivity loss, obtained from the quantification model developed through this study, ranges from ?11 to 17% depending on the amount of shift work used.     

The practitioner as researcher: Qualitative case studies in play therapy.

To help clinicians better understand case study research and encourage clinicians to share valuable experiences with others in the field, this article will define case study, identify the components of case studies, review critical considerations in case studies, and provide a recommended template for qualitative case studies. Fifteen case studies published in the International Journal of Play Therapy will be examined to review the process of these case studies, and the potential contribution of the study to illustrate the use of play therapy. Suggestions for further directions in the area of case study methodology in play therapy will be made. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Areas of Application for 3D and 4D Models on Construction Projects

In recent years more and more construction projects used three-dimensional/four-dimensional (3D/4D) models to support management tasks. However, project managers still struggle with evaluating how the 3D/4D model technology can be most efficiently applied on their specific project. One main reason for this struggle is that an account about how 3D/4D models have been used in the past is missing. This paper offers practitioners and researchers such an account of the application areas of 3D/4D model technologies including the purposes for which these technologies have been applied. The paper qualitatively aggregates the results of 26 case studies of 3D/4D model applications on construction projects to show researchers and practitioners how 3D/4D models have been applied to address project challenges. Using a “project challenge—3D/4D model application” matrix the paper explains each application area and describes why the application has been beneficial to the case study projects. The paper then analyzes the challenges that practitioners have faced with 3D/4D models on the test case projects. The main findings of this analysis are that practitioners on most of the test case projects have used the models for only one application area. The paper suggests that further research on the integration of 3D/4D model technologies into work and business processes of project teams is needed to address this opportunity for a more widespread use of 3D/4D models throughout the lifecycle of a project.     

Six Sigma-Based Approach to Improve Performance in Construction Operations

Many researchers and project managers have attempted to improve project performance by applying new philosophies such as lean principle, just-in-time, pull scheduling, and last planner. However, very little research has been conducted on setting definite quantitative goals for performance improvement while considering the defect rate involved in the construction operations. This research explores practical solutions for construction performance improvement by applying the six sigma principle. This principle provides the metrics required to establish performance improvement goals and a methodology for measuring and evaluating improvement. The proposed approach is expected to achieve more reliable workflows by reducing process variability to fit in a desirable range—thereby improving the overall performance through the evaluation of the quality level in current construction operations. To verify the suggested methodology, two case studies have been presented and process simulation analyses are performed to observe the performance changes based on the six sigma principle. Critical total quality control, as the sigma level rises, is also discussed.     

Attitudes in the Fiber of Everyday Life: The Discourse of Racial Evaluation and the Lived Experience of Desegregation.

This article critically reviews the social-psychological literature on race attitudes, which has assumed that the prejudicial status of any expression is determined by the underlying psychological attitude that motivated it. Variation and inconsistency in individuals' attitudinal expressions and disagreement over how to measure prejudice have bedeviled attitude research. Contemporary theories of racial attitudes (symbolic racism, self-presentation, aversive racism) have responded to this problem by explaining how, when, and why attitudes vary and by proposing research paradigms for isolating prejudiced from nonprejudiced expressions. The authors argue that research in this area may be enhanced by the use of qualitative methods that place fewer constraints on the expression of racial attitudes and variability than quantitative methods do. Using empirical materials from a South African case study, the authors show that a focus on attitudinal discourse and the lived experience of desegregation allow researchers to investigate attitudes as social practices. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Best Practices for Integrating the Concurrent Engineering Environment into Multipartner Project Management

The use of the Internet, e-mail, and other technologies has been steadily filtering into the building process, creating a concurrent engineering (CE) environment, and enabling collaborative efforts in the building process. The concurrent engineering environment is established by a variety of tools, including internet accessible servers, e-mail, mobile telephones, and many other existing CE tools. Organizations involved in the construction process recognize the need for assessment of benefits resulting from CE tools, but find the evaluation of these benefits difficult and complicated. The project presented in this paper, “project management and organization in the concurrent engineering environment (ProCE),” is applicable to both researchers and practitioners. The ProCE project developed a measuring model, which may be used by future researchers in this area, attempted to measure benefits derived from using the CE environment in construction design and project management routines, and developed guidelines for best practice implementation by practitioners, based on four case studies. The project included the measurement of both the quantitative and qualitative benefit of CE environment implementation in building construction projects using tools that were readily available through application service providers. Measurement of cost and other quantifiable benefits have been extensively studied. Therefore, the majority of the discussion in the current paper will address the ProCE project’s measurement of qualitative benefits.     

Consistent genetic alterations in xenografts of proximal stomach and gastro-esophageal junction adenocarcinomas

We relate a case history that involved the therapeutic sharing of self with an elderly patient. The potential usefulness of this kind of intervention is discussed in light of the literature on self-disclosure and the use of self in clinical practice. We discuss how these concepts might relate to other well-described phenomena in geriatric nursing, including reminiscence, life review, loneliness, and storytelling. Recommendations for use in clinical practice and for qualitative studies are given.     

Limitations of quantitative research in the study of structural adjustment

Sociologists and, more recently, critical medical anthropologists have been arguing for a refocusing of the analysis of health and health care towards a perspective which considers the broader global political economy. In the context of the debt crisis and IMF/World Bank-inspired structural adjustment policies, the political economy theoretical perspective is becoming even more relevant in the analysis of health underdevelopment in many 'Third World' countries. This study focuses on the direct and indirect effects of the Jamaican debt crisis and structural adjustment programmes on health care services and health standards. In this paper it is argued that there are methodological problems using quantitative data when studying the effects of structural adjustment. In addition to providing a limited account of the effects, it is argued that the basic problem is a matter of the availability and reliability of the quantitative data in many 'Third World' countries. It is argued that some of these problems could be overcome by the application of qualitative micro-level analysis. This type of methodology is important to ascertain the effects of global processes at the grass roots level and to gain insights into what those working in the health sector are experiencing and what they perceive as the effects, if any, of structural adjustment policies. This has often been missing from the impersonal accounts offered by quantitative research on the subject to date.     

Student Assessment of a Problem-Based Learning Experiment in Civil Engineering Education

This paper describes an experiment with problem-based learning (PBL), an instructional methodology used in response to the challenges posed by today’s professional education. Contrary to the conventional model that places an application problem after concepts or topics have been introduced, PBL uses the problem to initiate learning. Besides promoting the construction of knowledge, it may also contribute to the development of some skills and attitudes deemed important for engineers’ professional practice. This research, of a qualitative nature, intended to investigate how students evaluate this methodology and its potential to attain the educational goals set for the course. In order to answer the research question, the methodology was implemented in the civil engineering curriculum of a Brazilian public university. The results herein presented, deriving mainly from classroom observations and an end-of-course questionnaire, show that most of the students evaluate the methodology positively. Even considering the short duration of the course and its small number of credits, it may also have promoted the development of some skills and attitudes besides knowledge acquisition.     

Methodology for Conducting Discrete-Event Simulation Studies in Construction Engineering and Management

This paper suggests the methodology to follow when conducting discrete-event simulation (DES) studies in construction engineering and management research. Emphasis is made on the steps that, due to the uniqueness of the construction environment, are particularly important yet are not discussed extensively in the general DES literature. Guidelines are provided to determine what aspects of a DES study demand a rigorous application of the theory depending on the purpose of the study. The paper concludes with the importance of properly understanding the probabilistic concepts upon which DES relies and on coupling this understanding with engineering judgment as a key for successful use of DES in construction research.     

Management’s Perception of Key Performance Indicators for Construction

There is a great need in the construction industry for identifying a set of common indicators to be used by construction executive and project managers in measuring construction performance at the project level. The focus of this research was to collect management perceptions of the key performance indicators currently utilized in the construction industry. Both quantitative performance indicators and qualitative performance indicators are represented. A literature search was used to generate the initial set of perceived key performance indicators, which were administered to the construction industry via a survey. A statistical analysis of the collected survey responses provided information for the identification of a common set of perceived Key Performance Indicators (KPIs) by construction sector, management level, and experience level. Correlations were performed for both the quantitative and qualitative indicators to determine which type of indicator is used most extensively. Basic statistical analyses and frequency distributions provided evidence in support of some of the hypotheses of the research. The results of the survey data analysis support the hypothesis that KPIs vary according to management’s perspective. Further analysis displayed a substantial difference between construction executive and project management’s perceptions. However, six indicators were reported as being most useful by every segment of the construction industry involved in this study. The correlation between quantitative indicators and qualitative indicators proved to be inconclusive.     

Comparable Performance Measurement System for Construction Companies

The construction industry has mainly relied on financially focused performance measurements, and studies on performance measurement systems (PMSs) have been carried out at the project level. However, recently, the demand for performance evaluation and management at the company level has increased. A few previous efforts have aimed to develop a conceptual framework for company performance, but there have been few follow-up studies. From this perspective, we have developed an implementation model and practical methodology to measure and compare the performance of construction companies. First, our thorough qualitative and quantitative analysis was used to develop a set of indicators for performance measurement, and an analysis of the relative weightings of the indicators was carried out. Second, we calculated the performance score of construction companies using a study of 34 Korean construction companies. Finally, we carried out a performance evaluation and system analysis using the calculated performance scores and identified practical issues for the implementation of our PMS. Using the results of our analytical processes identified in this work, further research is suggested.     

Gender differences in risk perception: theoretical and methodological perspectives

A substantial body of risk research indicates that women and men differ in their perceptions of risk. This paper discusses how they differ and why. A review of a number of existing empirical studies of risk perception points at several problems, regarding what gender differences are found in such studies, and how these differences are accounted for. Firstly, quantitative approaches, which have so far dominated risk research, and qualitative approaches give different, sometimes even contradictory images of women's and men's perceptions of risk. Secondly, the gender differences that appear are often left unexplained, and even when explanations are suggested, these are seldom related to gender research and gender theory in any systematic way. This paper argues that a coherent, theoretically informed gender perspective on risk is needed to improve the understanding of women's and men's risk perceptions. An analysis of social theories of gender points out some relations and distinctions which should be considered in such a perspective. It is argued that gender structures, reflected in gendered ideology and gendered practice, give rise to systematic gender differences in the perception of risk. These gender differences may be of different kinds, and their investigation requires the use of qualitative as well as quantitative methods. In conclusion, the arguments about gender and risk perception are brought together in a theoretical model which might serve as a starting point for further research.     

Contractor Process Improvement for Enhancing Construction Productivity

This paper presents a regression model that relates job site productivity to process improvement initiatives (PIIs) executed both before and during construction. Applied during early project stages, this model helps industry practitioners to predict the expected value of labor productivity based on certain inputs related to preconstruction planning and construction execution. The model demonstrates the strong relationship of project performance to a variety of PIIs including design completeness, definition of a project vision statement, testing oversight, and project manager experience and dedication. The correlational research methodology targeted 75 projects representing approximately $274.53 million in civil construction. The data collection effort considered 45 PIIs (independent variables) using quantitative and qualitative measures. The modeling technique involved the use of multiple linear regression, a method that exploits available data from multiple, independent sources to focus on specific outcomes. The model was developed directly from contractor specific information and subjected to rigorous statistical analysis. The model provides project managers as front line industry practitioners with a deliberate yet practical approach to project management and productivity enhancement. The modeling results include verification analysis and a discussion of the model’s usefulness and limitations.     

A method of rating assimilation in psychotherapy based on markers of change.

This article reports the development of a marker-based method for rating assimilation in psychotherapy with a case study of a woman, Sarah, who was treated for depression with process-experiential psychotherapy. To increase the rigor of the qualitative case study methodology, independent judges rated passages--taken out of context and randomly ordered--from the qualitative analysis. The authors examined levels of training required to make quantitative judgments by comparing ratings from 4 graduate students and 4 undergraduate students. Pooled reliabilities of the 2 groups of caters were high (.90 and .84), and the estimated reliability of single graduate student raters was acceptable (.70). Consistent findings across a series of related case studies are reviewed to address the generalizability of the findings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)