Jaeyoung Oh

Purpose: This study examines how inter-project interdependencies influence portfolio-level performance. Drawing on information processing theory (IPT), it distinguishes between scope interdependency (strategic alignment of deliverables) and process interdependency (executional and temporal linkages), and examines the moderating role of project portfolio management (PPM) maturity. Design/methodology/approach: Survey data from 219 project professionals in South Korea were analysed using structural equation modelling to test the effects of interdependencies on average project fulfilment and average economic project success, with multi-group analysis assessing moderation by PPM maturity. Findings: The results show that scope interdependency positively affects average project fulfilment, indicating benefits from strategic alignment across projects. In contrast, process interdependency has a negative effect, suggesting increased coordination and information-processing burdens during execution. Furthermore, higher levels of PPM maturity mitigate the negative impact of process interdependency and strengthen the relationship between average project fulfilment and average economic project success. Originality/value: This study advances PPM research by conceptually and empirically distinguishing strategic (scope) and executional (process) interdependencies and demonstrating their opposing effects on portfolio-level performance. By integrating IPT with PPM maturity as a contingent information-processing capability, the study provides novel insights into how organisations can better manage complex inter-project relationships to enhance portfolio outcomes.

Semiconductor and AI-enabling supply chains (SCs) face unprecedented disruption from export-control regimes such as the U.S. CHIPS and Science Act. While these policies are intended to safeguard national security, they can also fragment global SCs and accelerate technological advancement in rival nations. This study develops a quadripartite game-theoretic model involving a regulator, a key technology supplier, a regulated firm, and a rival nation to explore how fines, sanctions, and technological capability influence strategic behavior across six geopolitical regulatory regimes. The results show that export controls are most effective not when penalties are maximized, but when enforcement is strategically calibrated, supplier-level execution is aligned with regulatory objectives, and regulated firms can comply without undermining economic viability. Excessively stringent regimes increase enforcement and adaptation costs and may accelerate innovation by the rival nation, while overly lenient regimes weaken deterrence and enable persistent circumvention. By conceptualizing export controls as a coordinated governance and execution problem embedded in interdependent global SCs, this study provides a quantitative framework to support the design of sustainable export-control regimes that balance security, innovation incentives, and SC stability. For engineering managers, the findings highlight the importance of compliance-oriented system design, supplier coordination, and strategic adaptation when operating in adversarial, highly regulated SC environments.

This study explains how integrating with foreign suppliers fortifies a buying firm’s supply-chain resilience, captured here as heightened market responsiveness. Drawing on information-processing theory, we argue that supplier integration equips buyers with richer, faster information flows that enable timely adaptation to market shocks. Extending value-congruence theory, we posit that this resilience dividend depends on simultaneous cultural alignment at two levels—national and organizational. Survey data from 174 manufacturing firms engaged in international buyer–supplier relationships across East Asia, North America, Latin America and Europe were analyzed via hierarchical regression. Results confirm that foreign supplier integration has a positive main effect on market responsiveness. Crucially, a significant three-way interaction (integration × national-culture congruence × organizational-culture congruence) reveals that the responsiveness—and thus resilience—payoff materializes only when both cultural layers are highly congruent; congruence at just one layer is insufficient. By demonstrating the contingent, multilevel nature of resilience benefits, this research advances the global supply-chain literature in three ways: (1) it unites information-processing and value-congruence perspectives to clarify when integration generates adaptive capability; (2) it positions dual-level cultural fit as a prerequisite for resilient performance; and (3) it offers region-spanning evidence that guides managers in designing culturally attuned integration strategies to withstand market turbulence.

Purpose: This study investigates how the salespersons behave in coordinating the multiple communication channels during supplier integration (SI) for new product development (NPD), especially when their engineers directly collaborate with the buyer.Methods: This study conducted a qualitative study to explore the dynamics of the supplier’s salespersons during SI for NPD. With the support of a consumer goods manufacturer (focal firm) in South Korea, we interviewed several managers, including purchasing and engineering, from the focal firm and salespersons from eight tier-1 suppliers of the focal firm.Results: The results found that the supplier’s salespersons show two different behaviors toward managing and controlling the collaboration between their engineers and the buyer: (1) Process regulating behaviors that control the flows of information or communication between the engineers and the buyer, and (2) knowledge regulating behaviors that directly and indirectly support the engineers to be equipped with accurate and complete knowledge so that they can share the right knowledge with the buyer.Conclusion: This study contributes to academia and practitioners as follows. To academia, this study fill the gap in the literature by introducing the distinct behaviors of the supplier’s salesperson in SI for NPD. To practitioner, in addition, our findings present coordination mechanisms to manage and control multiple communications within an inter-organizational collaboration.

Despite the growing popularity of blockchain technology (BT) applications in a supply chain (SC), the academic literature has failed to offer a complete picture of BT embedded in SC, hereafter referred to as BT-enabled SC, while focusing on BT’s specifics. Against this backdrop, this paper aims to develop a conceptual framework by identifying BT’s multifaceted features and clarifying their roles in designing BT-enabled SCs. Specifically, we delve into BT’s extant definitions in business disciplines as a basis for identifying BT’s key attributes and elucidate how these attributes can be incorporated into the design of BT-enabled SCs by introducing the framework that encompasses the strategic, configural, and operational spheres. This paper contributes to clarifying BT’s conceptual boundary by framing BT as a stack of technologies and applications – seven dimensions. Based on seven dimensions, the proposed framework offers guidance on how to design BT-enabled SCs.

Chit-chat 대화시스템은 컴퓨터와 사용자 간의 자유로운 대화를 위한 시스템으로, 다양하고 흥미로운 응답을 생성하는 것을 목표로 한다. 그러나 maximum likelihood 기반의 일반적인 학습 방식에서 모델이 짧고, 별다른 의미를 내포하지 않는 상투적인(generic) 응답을 과하게 생성하여 시스템에 대한 사용자의 흥미를 떨어뜨리는 문제가 꾸준히 보고되어 왔다. 이에 최근 unlikelihood training을 통하여 고빈도로 등장하는 단어의 과다한 사용에 페널티를 줌으로써 다양한 응답을 생성하는 학습 방법이 제안되었으나, 이는 각 단어의 사용량에 따라 페널티를 줄 뿐 각 단어가 어떠한 맥락으로 사용되었는지는 고려하지 못하는 한계를 가진다. 이에 본 연구에서는 고빈도로 등장하는 엔그램(n-gram) 사용량을 조절하는 방식을 제안하였다. 제안된 방식은 엔그램 단위로 주변 맥락에 대한 정보를 이용함으로써 응답의 상투적인 정도에 따른 페널티를 보다 섬세하게 줄 수 있다는 이점을 가진다.

We investigate how supplier performance is influenced by the behaviors (self-interested behaviors and gatekeeping actions) of a supplier’s salesperson and engineer, and how such behaviors affect a performance-based contract design to ensure the desired performance from the supplier. This article develops a incentive contract that proves how such behaviors affect supplier performance, elucidating how agents’ behaviors influence a buyer’s incentive contract form for collaboration with the supplier. Our study found that in general, the behaviors of salespeople and engineers can damage supplier performance. Their impact changes depending on some contingent factors, proposing incentive contract forms that can mitigate the negative consequences of the behaviors on supplier and buyer performance. This paper takes multiple agents’ behaviors and their behavioral disutility into consideration when developing an incentive contract.

Purpose: This study seeks: (1) to identify whether the form of governance adopted (relational or contractual) drives suppliers' and buyers' collaboration in the same way; (2) to examine if both parties hold a similar view on the simultaneous use of both governance forms; and (3) to explore whether their perceptions on governance, collaboration and performance differ.Design/methodology/approach: The study used data from a survey of 150 matched buyer–supplier dyads from South Korea, using structural equation modeling (SEM) for the analysis.Findings: (1) While governance mechanisms assist collaboration and affect operational and innovation outcomes, the significance and relative strength of the proposed relationships are perceived differently by buyers and suppliers. (2) Contrasting results are found regarding the interaction effect of the governance mechanisms on collaboration: a complementary relationship for the buyer and a substitutive relationship for the supplier.Originality/value: Studies on buyer–supplier relationships have yielded inconsistent results regarding whether the interactions of governance mechanisms function as substitutes or complements, because research has largely been conducted from the buyer's perspective, rather than the supplier's; this imbalanced view calls for integrated perspectives.