multi-echelon inventory systems are one of the most important and attractive areas in modelling supply chain management so that several researches and studies have been done about. in this paper, the total cost function of a two-echelon inventory system with central warehouse and many identical retailers controlled by continuous review inventory policy is estimated. we have assumed the demand i...

the primary purpose of this paper is to highlight for the research community and practitioners the various aspects of using vmi-type supply chains in today’s business environment as well as a number of directions for future studies. in this regard, fifty articles published in major international journals, beginning in 1995, which contribute to the vmi-type supply chains are reviewed via a syste...

This study investigated the learning styles of history students depending on some demographic variables. The sample consisted 1849 from seven history-teaching (n=875) and eight departments (n=974) ten universities in different regions Türkiye. Data were collected using a personal information form Kolb Learning Styles Inventory (KLSI-3). According to Kolb's classification four styles, participan...

In this paper by using numerical evaluation the effect of balancing drupes of water hammer on tunnels lining is considered. In case of not arrangment of these reservoirs, the tunnel lining will be damaged of cyclic powers of water hammer. In this research, function of balancing reservoir of water hammer on cover of tunnels to the barriers’ turbine is simulated by numerical methods and Plaxis 3D...

Assembly Line production is one of the widely used basic principles in production system. The problem of Assembly Line Balancing deals with the distribution of activities among the workstations so that there will be maximum utilization of human resources and facilities without disturbing the work sequence. Research works reported in the literature mainly deals with minimization of idle time i.e...

We introduce a class of models, called newsvendor networks, that allow for multiple products and multiple processing and storage points and investigate how their single-period properties extend to dynamic settings. Such models provide a parsimonious framework to study various problems of stochastic capacity investment and inventory procurement. Newsvendor networks can feature commonality, ßexib...

In this paper, we consider a two-retailer and one-supplier supply chain in which retailers make an extra effort to satisfy demand from customers who experience stockouts — retailers offer to direct-ship out-of-stock items on an expedited basis at no extra cost to customers. This practice is referred to as the fast-ship option. By supporting the fast-ship option, retailers and suppliers can redu...

We develop the first algorithmic approach to compute provably good ordering policies for a multiechelon, stochastic inventory system facing correlated, non-stationary and evolving demands over a finite horizon. Our approach is computationally efficient and guaranteed to produce a policy with total expected cost no more than twice the expected cost of an optimal policy. As part of our computatio...

With the growth in customers’ demand diversification, mixed-model U-lines (MMUL) have acquired increasing importance in the area of assembly systems. There are generally two different approaches in the literature for balancing such systems. Some researchers believe that since the types of models can be very diverse, a balancing approach without simultaneously sequencing of models will not yield...