In today’s globally competitive environment, decision makers in supply chains are faced with numerous challenges particularly regarding the selection of suppliers. To assist in this endeavor, we examine a double-layered supply chain where a buyer (vendor) facing the end users has the option of selecting among a cohort of suppliers. The available suppliers have different yield rates and unit cos...

The present paper proposes an evaluation model able to integrate the selection phase with the monitoring and the continuous analysis of the vendor performances. The vendor evaluation process is realised through an opportune methodology which puts beside qualitative judgements (i.e. the adequacy of the organisation or the maintenance management policies) and performance data (i.e. delivery delay...

The era of globalization has begun and organizations endeavor to increase their market share in the competitive environment. To achieve the mentioned goal, organizations should increase their effectiveness as a major strategy in order to improve their performance. Performance measurement as a managerial key can be used for monitoring activities in organizations. Vendors’ selection is one of the...

Since the Commercial off-the-shelf (COTS) software become widespread components in the market for building the systems with less time and cost, the COTS evaluation and selection becomes a non-trivial task. There are many models attempted to propose a set of characteristics for evaluating and selecting COTS software. However, these models have concentrated on the functional and quality character...

The Cloud resource procurement of cloud resources is an interesting and yet unexplored area in cloud computing. cloud vendors choose a fixed pricing strategy for pricing their resources and do not provide any incentive to their users. That’s why to choose only automates the selection of an appropriate cloud vendor and also to implement the dynamic pricing. A cloud broker which can implement the...

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In a recent paper in this journal Shyur and Shih [1] propose a hybrid MCDM model for strategic vendor selection. In subsection 3.3 (Activity 2), the authors calculate the normalized decision matrix R(=[rij]). They calculate the normalized value rij as follows: rij = fij √ n ∑ j=1 f 2 ij , (1) where j = 1, . . . , n; i = 1, . . . ,m.By virtue of its TOPSIS feature, Eq. (1) is not correct. In...

Recent changes in supply chains, especially globalization and collaboration, have created new risks for enterprises of all sizes. A variety of complex frameworks, often based on enterprise risk management strategies have been presented under the heading of Supply Chain Risk Management (SCRM). The literature on promotes the benefits of a robust SCRM strategy; however, implementing SCRM is diffic...

Problem of vendor evaluation and selection has always been viewed as the most important responsibility of purchasing department and for such reason, received a great deal of attention from practitioners and researchers. This solution has always been a complex process as various criteria, known and half known are involved in making a decision. This work attempts to develop a rule based model, to...

We apply the contractor renormalization (CORE) method to the spin half Heisenberg antiferromagnet on the frustrated checkerboard and pyrochlore lattices. Their ground states are spin-gapped singlets which break lattice symmetry. Their effective Hamiltonians describe fluctuations of orthogonal singlet pairs on tetrahedral blocks, at an emergent low energy scale. We discuss low temperature thermo...