A critical evaluation of alternative methods and paradigms for conducting mediation analysis in operations management research

Mediation as a theory testing approach has witnessed considerable adoption among Operations Management (OM) researchers. Although mediation-testing methods have evolved tremendously in the past decade, their dissemination in the OM field has not seen parallel growth. These advanced techniques facilitate the testing of existing and complex hypotheses in a more precise manner. With the intent of critically evaluating existing and alternative methods for conducting mediation analysis needed to support sophisticated empirical research, this paper first reviews OM studies that tested for mediation in the past eleven years (2002–2012) from top-tier OM journals. Four commonly used mediation approaches were identified. Based on principles of good theory building, type of mediation model, and properties of empirical data, we evaluate the existing methodologies and make recommendations on how to improve the rigor of OM mediation testing. Using published OM studies in top journals as examples, we then illustrate the relevance and advantages of these recommendations, as well as their ease of use. Furthermore, we empirically show that more robust and insightful results can be achieved by adopting these techniques, which in turn have the promise of leading to better theory building and testing in the field of operations management.     

Contingency research in operations management practices

As operations management (OM) best practices have become mature, research on practices has begun to shift its interest from the justification of the value of those practices to the understanding of the contextual conditions under which they are effective—OM practice contingency research (OM PCR). This article sets out to examine and critique the current state of OM PCR. We review OM PCR studies through the lens of the major theoretical view on contingencies, contingency theory, along a number of relevant dimensions: contingency variables, performance variables, measurement, research design and employed form of fit. In this process, we put forward a number of tasks that need to be accomplished in order to move OM PCR forward and develop more solid conceptual foundations in which to anchor rigorous research in this area. Finally, we reflect on the theoretical arguments that underlie OM PCR (which are based on the contingency approach) and identify its limitations in fully explaining the currently observed patterns of use of OM practices and associated performance outcomes. As a result, we propose that in order to increase our understanding of these patterns, OM scholars need to study in more depth the process of selection of OM best practices by organizations. Accordingly, we put forward a framework to underpin such research integrating contingency theory and other theoretical perspectives.     

Resource based theory in operations management research

Resource based theory (RBT) has become increasingly popular in operations management research. The development and current application of RBT to the study and understanding of operations management problems and phenomena are reviewed and articles in the recent six plus years across nine journals are evaluated. Based on this review and evaluation, we identify several issues in the overall research and highlight some exemplary research themes in the use of RBT in operations management. Our research suggests that further application of RBT can add richness in operations management research, and has the potential to produce multiple contributions for this field and adjacent fields.     

Using partial least squares in operations management research: A practical guideline and summary of past research

The partial least squares (PLS) approach to structural equation modeling (SEM) has been widely adopted in business research fields such as information systems, consumer behavior, and marketing. The use of PLS in the field of operations management is also growing. However, questions still exist among some operations management researchers regarding whether and how PLS should be used. To address these questions, our study provides a practical guideline for using PLS and uses examples from the operations management literature to demonstrate how the specific points in this guideline can be applied. In addition, our study reviews and summarizes the use of PLS in the recent operations management literature according to our guideline. The main contribution of this study is to present a practical guideline for evaluating and using PLS that is tailored to the operations management field.     

The relative importance of journals used in operations management research A citation analysis

Journal rankings are important for a variety of reasons, most importantly as the basis of academic tenure and promotion decisions. A common approach in other fields is the citations methodology which is used in this study to determine the relative importance of various operations management (OM) journals. The citations analysis noted the frequency that all other journals are cited in Decision Sciences, Journal of Operations Management, and Management Science during the period 1992 to 1994. Rankings are provided based on total citations, citations per article, and citations per words published. The study shows that the journals with the most importance to OM research are Management Science, Decisions Sciences and Operations Research. Other journals important to OM research are the Harvard Business Review, Journal of Operations Management, and IIE Transactions.     

The service sector: Challenges and imperatives for research in operations management

The United States has undergone a transformation from an industrial society to the first postindustrial society. Consequently, the service sector has outstripped manufacturing in its contribution to the GNP and in employment. This paper discusses the challenges and imperatives for research in service operations management (SOM). Service operations have unique characteristics that must be considered in developing research strategies. Recent attempts at evolving a general theory of service organizations are reviewed, and it is suggested that these conceptual models provide a unifying framework for the study of SOM. Research in SOM requires a broad perspective that includes the customer and the interactions with other functional areas. It requires an integration of conventional production concepts with behavioral and marketing considerations.     

职业经理人信用评价与管理研究

职业经理人的信用不仅影响其本人的发展前景,而且也影响到企业的发展和利益。文中通过对职业经理人信用的主要影响因素进行分析,探讨了职业经理人信用评价体系的建立,提出了加强职业经理人信用管理的主要对策。     

A disaster's effects on material management operations

No one should ever have to encounter a disaster of the magnitude of Avianca flight 052, Hurricane Hugo, or the San Francisco earthquake of 1989. However, we all learn about the appropriate preparation and response that is necessary for managing a disaster effectively after these events. The importance of material management functions in providing the resources for the implementation of direct patient care is often neglected, and recognition is rarely given to these heroes in a disaster situation.     

Addressing the endogeneity dilemma in operations management research: Theoretical,empirical, and pragmatic considerations

In this paper, we examine the problem of endogeneity in the context of operations management research. Whereas the extant literature has focused primarily on the statistical aspect of the problem, a comprehensive treatment requires an examination of theoretical and pragmatic considerations as complements. The prevailing problem with the focus on statistical techniques is that the standards tend to be derived from idealizations: the correlation between a regressor and a disturbance term must be exactly zero, or the analysis will be invalid. In actual empirical research settings, such a knife-edge assumption can never be satisfied, indeed it cannot even be directly tested. Idealizations are useful in helping us understand what it would take to eliminate endogeneity, but when applied directly and unconditionally, they lead to unreasonable standards that may unnecessarily stifle substantive inquiry. We believe that it is far more productive and meaningful to ask: “What can we realistically expect empirical scientists to be able to achieve?” To this end, we cover and revisit some of the general technical material on endogeneity, paying special attention to the idiosyncrasies of operations management research and what could constitute reasonable criteria for addressing endogeneity in empirical operations management studies.     

Field vehicle fleet management in humanitarian operations: A case-based approach

Transportation is the second largest overhead cost to humanitarian organizations after personnel. Academic knowledge about fleet management in humanitarian operations is scarce. Using a multiple case research design we study Field Vehicle Fleet Management (Field VFM) in four large International Humanitarian Organizations (IHO): the International Committee of the Red Cross, the International Federation of Red Cross and Red Crescent Societies, the World Food Program and World Vision International. Our field research includes more than 40 interviews at headquarters, regional and national level in Africa, the Middle East and Europe. The paper answers three research questions: (1) How do IHO manage their field vehicle fleets? (2) What are the critical factors affecting IHO Field VFM? (3) How does Field VFM affect in-country program delivery? The contribution of this research is twofold. First, it helps to fill the existing gap in the humanitarian literature regarding Field VFM. Second, it expands the fleet management literature to a new and virtually unexplored area.     

Mapping sexual orientation research in management: A review and research agenda

Attitudes, norms, and laws regarding sexual orientation are undergoing a worldwide revolution. Managers and HR professionals play a key role in responding to these changes, and managing issues related to sexual orientation diversity in organizations. As such, the amount of management scholarship on sexual orientation has been rapidly growing to help inform practice. However, at present, the literature is fragmented across management specialty areas. This makes it difficult to have an overview of what has been learned to date, and detect research opportunities. Thus, this article aims to provide the first integrative review of sexual orientation research across the management field over 23 years. We use bibliometric techniques to (a) systematically identify and map 111 topics in this literature (map downloads from: https://bit.ly/SOTopicMap ), (b) identify topic trends and topic citation rates, and (c) derive an inductive taxonomy of major topic clusters. We then identify key theories and relationships in the literature, review key findings for scholars and practitioners, and identify future research directions. Among these, we highlight the need to incorporate sexual orientation as a standard demographic question in management research, and highlight best practices for doing so from other scientific fields.     

The role of APICS in professionalizing operations management

The APICS organization is the professional association most closely affiliated with operations management practitioners. The organization is widely known for their Certified in Production and Inventory Management (CPIM) program that assesses individual knowledge in the field of production and inventory management. APICS and the CPIM certification have played a major role in elevating the professionalism of individuals who work in operations management. This paper will detail a history of APICS and the CPIM certification and describe the role of academics in the development of the certification.