Although information technology (IT) outsourcing is widely applied by companies and has been intensively researched, there has been little scientific research on the differences in singleversus multi-sourcing constellations. Furthermore, linear extension of single-sourcing to multi-sourcing is limited, despite the fact that companies utilize multi-sourcing more frequently in recent times. This ...

Original scientific paper In the present conditions of market globalization and thus increased market competition, the purchasing department and management structure of the company, in addition to answering questions what, how many and when to buy at what price, has also to be answered the question about an appropriate supplier. Supplier selection as well as the efficient inventory control can ...

We consider a single-product periodic-review inventory system for a retailer who has adopted a dual sourcing strategy to cope with potential supply process interruptions. Orders are placed to a perfectly reliable supplier and/or to a less reliable supplier that offers a better price. The success of an order placed to the unreliable supplier depends on his supply status that has a Markovian natu...

Managing the purchasing task in the supply chain has been a challenge in the last decade for many corporations. The need to gain a global competitive edge on the supply side has increased substantially. Particularly for companies who spend a high percentage of their sales revenue on parts and material supplies, and whose material costs represent a larger portion of total costs, savings from sup...

A key challenge in inventory management is to identify policies that optimally replenish from multiple suppliers. To solve such optimization problems, managers need decide what quantities order each supplier, given the net and outstanding orders, so expected backlogging, holding, sourcing costs are jointly minimized. Inventory problems have been studied extensively for over 60 years, yet even b...

The supplier selection and order allocation are two key strategic decisions in purchasing problem. The review presented in this paper focuses on the supplier selection problems (SSP) and order allocation from year 2000 to 2017 in which a new structure and classification of the existing research streams and the different MCDM methods and mathematical models used for SSP will be presented. The re...

Supply chain management is an integrative approach for planning and control of materials and information flows with suppliers and customers as well as between different functions within a company. One particularly important element in supply chain management is the management of inventories. This field has received considerable attention during the last years. Nevertheless, most quantitative an...

We analyze the environmental benefits of operational flexibility that emerge in form less product waste during sourcing process by reducing overproduction. consider three different options for flexibility: (1) lead-time reduction, (2) quantity-flexibility contracts, and (3) multiple sourcing. use a multiplicative demand to model evolutionary dynamics uncertainty. then quantify impact key modeli...

Nowadays, Companies have to deal with an uncertain demand which is more difficult to handle when it has a non-stationary pattern. Simultaneous decrease of customer service and increase of stock costs are the most significant effects of such demand uncertainty. To deal with this issue, inventory optimization models must be adapted to cover a multi-echelon network structure and to consider altern...