Articles scientifiques

A Pattern-Based Approach to Protocol Mediation for Web Service Composition


Information and Software Technology

2010, vol. 52, n°3, pp.304-323

Départements : Informations Systems and Operations Management, GREGHEC (CNRS)

Buffer and Server Allocation in General Multi-Server Queueing Networks

T. Van Woensel, R. Andriansyah, F. R. B. Cruz, J. MacGregor Smith, L. KERBACHE

International Transactions in Operational Research

mars 2010, vol. 17, n°2, pp.257-286

Départements : Informations Systems and Operations Management, GREGHEC (CNRS)

This paper deals with the joint optimization of the number of buffers and servers, an important issue since buffers and servers represent a significant amount of investment for many companies. The joint buffer and server optimization problem (BCAP) is a non-linear optimization problem with integer decision variables. The performance of the BCAP is evaluated by a combination of a two-moment approximation (developed for the performance analysis of finite general-service queues) and the generalized expansion method (a well-known method for performance analysis of acyclic networks of finite queues). A standard non-linear optimization package is used to optimize the BCAP for a large number of experiments. A comprehensive set of numerical results is presented. The results show that the methodology is capable of handling the trade-off between the number of servers and buffers, yielding better throughputs than previously published studies. Also, the importance of the squared coefficient of variation of the service time is stressed, since it strongly influences the approximate optimal allocation.general servicejoint buffer and server allocationnetworksqueues

Capacités d'innovation des entreprises familiales pérennes: Proposition d'un cadre théorique et méthodologique


Revue Française de Gestion

2010, vol. 36, n°200, pp.111-126

Départements : Informations Systems and Operations Management, GREGHEC (CNRS)

Mots clés : Family-owned business enterprises, Innovations in business, Competitive advantage, Creative ability in business, Industrial management

L'objet de cet article est de mettre en évidence les caractéristiques familiales ayant un impact positif sur le processus d'innovation. Le croisement des variables relatives à l'innovation et celles ayant trait aux entreprises familiales pérennes a permis de dégager un cadre d'analyse et méthodologique des capacités d'innovation des entreprises familiales pérennes innovantes

E-Government, E-Business and National Economic Performance


Communications of the AIS

2010, vol. 26, n°1, pp.267-286

Départements : Informations Systems and Operations Management, GREGHEC (CNRS)

Recent years have witnessed rapid developments in e-government as well as e-business within nations across the world. Although both e-government and e-business contribute toward national economic performance, few studies have analyzed the two jointly in a single research model. Using the Technology-Organization-Environment (TOE) framework and the literature on information and communication technology (ICT) impact; we empirically examine facilitators of e-government and e-business development, the relationship between e-government and e-business, and their collective impact on national economic performance. Our results, which emphasize the differential importance of factors associated with the development of e-government and e-business, can be used by national policy makers for designing effective ICT policies. Specifically, national ICT infrastructure appears to be important for both e-government and e-business. Quality of national human capital emerges as a significant facilitator for e-government but not for e-business, whereas national environment (institutional and macro-economic) appears to be the key enabler for e-business, but not for e-government. Our findings demonstrate the significant and intertwined roles of e-government and e-business in enhancing the national economic performance. With a view to enhancing national economic gains, this research suggests that policy makers should consider measures to enhance development of e-government and e-business collectively rather than in silos

Evaluating the Role of Trust in Consumer Adoption of Mobile Payment Systems: An Empirical Analysis

S. Chandra, S. C. SRIVASTAVA, Y.-L. Theng

Communications of the AIS

2010, vol. 27, pp.561-588

Départements : Informations Systems and Operations Management, GREGHEC (CNRS)

Mots clés : Trust, Consumer, Adoption, Mobile payment systems

Consumer adoption of mobile payment (m-payment) solutions is low compared to the acceptance of traditional forms of payments. Motivated by this fact, we propose and test a "trust-theoretic model for consumer adoption of m-payment systems." The model, grounded in literature on "technology adoption" and "trust," not only theorizes the role of consumer trust in m-payment adoption, but also identifies the facilitators for consumer trust in m-payment systems. It proposes two broad dimensions of trust facilitators: "mobile service provider characteristics" and "mobile technology environment characteristics." The model is empirically validated via a sample of potential adopters in Singapore. In contrast to other contexts, results suggest the overarching importance of "consumer trust in m-payment systems" as compared to other technology adoption factors. Further, differential importance of the theorized trust facilitators of "perceived reputation" and "perceived opportunism" of the mobile service provider, and "perceived environmental risk" and "perceived structural assurance" of the mobile technology, are also highlighted. A series of post-hoc analyses establish the robustness of the theorized configuration of constructs. Subsequent, sub-group analyses highlight the differential significance of trust facilitators for different user sub-groups. Implications for research and practice emerging out of this study are also discussed


Informations Systems and Operations Management

Campus HEC Paris
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Peter A. TODD

Informations Systems and Operations Management (GREGHEC)

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