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Six Sigma adoption: Operating performance impacts and contextual drivers of success

Journal of Operations Management 2012 30(6), 437-453
AbstractWe assess the operational impacts of Six Sigma program adoptions through an event study methodology, comparing financial data for 200 Six Sigma adopting firms against data for matched firms, which serve as control groups for the analyses. We employ various matching procedures using different combinations of pre‐adoption return on assets (ROA), industry, and size as matching criteria. By comparing performance outcomes across a hierarchy of operating metrics, we establish a pattern of Six Sigma adoption effects that provides strong evidence of a positive impact on ROA. Interestingly, these ROA improvements arise mostly from significant reductions in indirect costs; significant improvements in direct costs and asset productivity are not evident. We also find small improvements in sales growth due to Six Sigma adoption. Cross‐sectional analyses of the performance results reveal that distinctions in Six Sigma impacts across manufacturing and service firms are negligible. Interestingly, we find that the performance impact of Six Sigma adoption is negatively correlated to the firm's quality system maturity (indicated by prior ISO 9000 certification). Further analyses of manufacturing and service firms reveals that Six Sigma benefits are significantly correlated with intensity in manufacturing, and with financial performance before adoption in services. We discuss the implications of these findings for practice and for future research.

Supply chain practice and information sharing

Journal of Operations Management 2007 25(6), 1348-1365
AbstractEffective supply chain practice and information sharing enhances the current supply chain management environment. The purpose of this study is to investigate the integration of information sharing and supply chain practice in supply chain management. Data from 125 North American manufacturing firms were collected. The results show that (1) effective information sharing significantly enhances effective supply chain practice; (2) supply chain dynamism has significant positive influence on effective information sharing as well as effective supply chain practice. Supply chain dynamism has more influence on information sharing than supply chain practice; (3) and effective supply chain practice becomes more important when the level of information sharing increases. The findings show that both effective information sharing and effective supply chain practice are critical in achieving good supply chain performance.

The influence of power driven buyer/seller relationships on supply chain satisfaction

Journal of Operations Management 2005 23(1), 1-22
AbstractResearch on supplier satisfaction in buyer–supplier relationships has been primarily conceptual. One purpose of the research described in this paper is to empirically test the influences of supply chain power on supplier satisfaction. Exploration of the effects of power on factors of supplier satisfaction will provide the key to understanding the power‐satisfaction link in supply chain relationships. This paper shows how the buyer–seller relationship affects supplier satisfaction. In doing so, previous satisfaction and power literature is pulled together to demonstrate that the power‐satisfaction variable must be included in any examination of supply chain partnerships. The three primary objectives of this research are to establish how the different “bases of power” affect the satisfaction of selling firms, investigate how power driven relationships affect supplier satisfaction, and measure the effect of power influences on supplier satisfaction in the automobile industry. Each of these research objectives was achieved. This study establishes the first empirical evidence for the measurement of power‐driven supplier satisfaction. In each of the nine models studied, the power‐affected buyer–supplier relationship was found to have a significant positive effect on both performance and satisfaction. The paths between performance and satisfaction, however, were consistently found to be non‐significant.

The effect of the Rana Plaza disaster on shareholder wealth of retailers: Implications for sourcing strategies and supply chain governance⋆

Journal of Operations Management 2017 49-51(1), 52-66
AbstractSupply chain and reputational risks are often assumed to motivate firms to source production in developed, high‐cost countries rather than developing, low‐cost countries. To examine this assumption, we provide evidence from the collapse of the Rana Plaza building on April 24, 2013, which with its 1133 fatalities and 2438 injuries is seen as one of the worst industrial accidents in history. Do markets reactive negatively enough to such events to motivate firms to shift their sourcing strategy? We analyze the stock market reaction to the Rana Plaza disaster in the Bangladeshi ready‐made garment industry to address this question. Our analysis is based on a sample of 39 publicly traded global apparel retailers with significant garment sourcing in Bangladesh. Stock market reaction to retailers on the day of the Rana Plaza disaster is negative, but its magnitude and significance dissipate by the following day. We find no evidence of significant stock market reaction during the 11 trading days (approximately two weeks in calendar time) following the disaster. Retailers responded to the disaster by developing two different agreements to improve factory and worker safety in Bangladesh – the Accord on Fire and Building Safety in Bangladesh (AFBSB), and the Alliance for Bangladesh Worker Safety (ABWS). We find no evidence of significant stock market reaction to the announcements of the AFBSB and the ABWS. The insignificant negative economic impact from the Rana Plaza disaster suggests that retailers have little economic incentive to move sourcing out of Bangladesh or other low‐cost countries so as to reduce the risk of being involved in such events. We discuss the implications of our results for retailers, non‐governmental organizations (NGOs), garment factory owners in Bangladesh, the Bangladeshi government, and academic researchers.

The influence of task‐ and location‐specific complexity on the control and coordination costs in global outsourcing relationships

Journal of Operations Management 2013 31(3), 109-128
AbstractSeveral reputable industry sources have recognized that many organizations fail to realize the financial benefits sought with outsourcing. Further, prior research has found that outsourcing organizations struggle to estimate accurately the so called “hidden costs” associated with managing these inter‐organizational relationships. This is especially true of complex, globally distributed outsourced services. In this study, we use dyadic data on 102 outsourcing relationships to investigate how dimensions of task‐ and location‐specific complexity influence the degree of control and coordination costs incurred by the customer organization. Results from our hierarchical regression analysis demonstrate that the scale of the service and the geographic distance between the customer and provider locations are associated with higher levels of both control and coordination costs. Task breadth and geographic dispersion are significantly associated with increased control costs, but not coordination costs. Counter to our expectations, control costs decrease with the degree of service customization, whereas both control and coordination costs are negatively related to the average cultural distance between provider and customer organizations. These findings contribute unique empirical evidence to the outsourcing, offshoring, and international service operations literature.

The influence of exchange hazards and power on opportunism in outsourcing relationships

Journal of Operations Management 2012 30(1-2), 55-68
AbstractService provider opportunism is widely noted as a principal risk with outsourcing. Indeed, economic theory regarding the factors which influence the outsourcing decision, treats opportunism as a core behavioral assumption. It is assumed that if given the opportunity, outsourcing providers will act in a self‐serving manner despite the potentially negative impact it may have on their customer. Other researchers have suggested that opportunism is not an unwavering human behavior, but rather can be substantively influenced by the management practices which define the relationship. Building on these arguments, this study investigates the validity of these divergent positions. Hierarchical linear regression is used to examine dyadic data on 102 information technology, logistics, and other business process outsourcing relationships. We test a model which hypothesizes that the buying firm's reliance on different bases of inter‐firm power will have differing effects on the risk of opportunism (shirking and poaching). These hypotheses are evaluated while concurrently examining the influence of exchange hazards (relationship‐specific investments and technological uncertainty) on provider shirking and poaching. The results offer strong evidence that buyer reliance on mediated forms of power (i.e. rewards, coercive, legal legitimate) enhance the risk of both provider shirking and poaching, while non‐mediated power (i.e. expert, referent) is associated with a diminished level of opportunistic behavior. Interestingly, relationship‐specific investments have a significant effect on some forms of opportunistic behavior but not on other forms of opportunistic behavior. Technological uncertainty did not have a significant impact on provider opportunism.

A multi‐theoretic perspective on trust and power in strategic supply chains

Journal of Operations Management 2007 25(2), 482-497
AbstractStrategic supply chains serve as a potential source of competitive advantage for firms. The ability of a strategy supply chain to engender cultural competitiveness, or joint entrepreneurship and learning aimed at filling market gaps, is a key path through which a strategic supply chain may become a competitive advantage. A balance of trust and power within the supply chain offsets uncertainty and risks associated with the behaviors underlying cultural competitiveness. Using a multi‐theoretic perspective, we discuss four strategies that firms use to balance a climate of trust and power in a strategic supply chain. Identifying an authority, generating a common supply chain identity, utilizing boundary spanning ties, and providing procedural and interactive justice are the strategies we discuss.

Theorizing, testing, and concluding for mediation in SCM research: Tutorial and procedural recommendations

Journal of Operations Management 2014 32(3), 99-113
AbstractEmpirical research in Supply Chain Management is increasingly interested in complex models involving mediation effects. We support these endeavors by directing attention to the practices for the theorizing of, the testing for, and the drawing of conclusions about mediation effects. Our paper synthesizes diverse literature in other disciplines to provide an accessible tutorial as to the mathematical foundation of mediation effects and the various methods available to test for these effects. We also provide guidance to SCM scholars in the form of eight recommendations aimed at improving the theorizing of, the testing for, and the drawing of conclusions about mediation effects. Recommendations pertaining to how mediation effects are hypothesized and stated and how to select among methods to test for mediation effects are novel contributions for and beyond the Supply Chain Management discipline.

Capabilities that enhance outcomes of an episodic supply chain collaboration

Journal of Operations Management 2011 29(6), 591-603
AbstractFirms are increasingly dependent on the knowledge and expertise in external organizations to innovate, problem‐solve, and improve supply chain performance. This research examines two capabilities that enable firms to collaborate successfully as a means to combine knowledge and expertise in an episodic collaboration initiative. Building from two theoretical foundations, the knowledge‐based and relational views of the firm, we examine the effects of absorptive capacity and collaborative process competence on the outcomes of an episodic collaboration initiative. Using structural equation modeling, we empirically validate the positive effect of absorptive capacity, collaborative process competence and level of engagement on the operational and relational success of a collaboration effort. Results show that collaborative process competence mediates the relationship between absorptive capacity and collaborative engagement, and positively influences both operational and relational outcomes. Finally, we offer suggestions for managers to improve the effectiveness of inter‐firm collaboration initiatives and discuss future research opportunities.

RETRACTED: An investigation of corporate social responsibility conformity: The roles of network prominence and supply chain partners

Journal of Operations Management 2024 70(4), 600-629
Abstract Numerous studies on corporate social responsibility (CSR) indicate that firms adopt CSR practices for various reasons related to their supply chain. However, the necessity to conform to a firm's own industry CSR norm is overlooked. Conforming to one's industry CSR norm—a herding behavior known as CSR conformity —ensures firm in‐group legitimacy and preserves internal resources for core business activities. On the other hand, deviating from industry norms sets a firm apart from its peers, making the firm more appealing to supply chain partners. Motivated by this dilemma, this study draws on middle‐status conformity theory and explores how a firm's network prominence determines its CSR conformity. Panel data analyses of 1650 firm‐year observations reveal an inverse U‐shaped relationship between firm network prominence and its CSR conformity, indicating that firms with a mid‐level network prominence engage in higher CSR conformity. However, the inverse U is flattened when a firm's supply chain partners (and their respective industries) share similar CSR standards, suggesting that a firm can only prioritize its own industry CSR norms if its supply chain partners share a compatible CSR standard. These findings highlight the importance of understanding CSR from an organizational conformity perspective, especially in the context of supply chain network.