In many multi-echelon inventory systems, the lead times are random variables. A common and reasonable assumption in most models is that replenishment orders do not cross, which implies that successive lead times are correlated. However, the process that generates such lead times is usually not well defined, which is especially a problem for simulation modeling. In this paper, we use results fro...

  The importance of reliable supply is increasing with supply chain network extension and just-in-time (JIT) production. Just in time implications motivate manufacturers towards single sourcing, which often involves problems with unreliable suppliers. If a single and reliable vendor is not available, manufacturer can split the order among the vendors in order to simultaneously decrease the supp...

Nowadays, the integration of multi-energy carriers is one most critical matters in smart energy systems with aim meeting sustainable development indicators. Hydrogen referred to as main future industry, but its into system faces different open challenges which have not yet been comprehensively studied. In this paper, a novel day-ahead scheduling presented reach optimal operation hydrogen-based ...

New formulation and a branch-and-cut algorithm for the multiple allocation p-hub median problem Sergio García, Mercedes Landete and Alfredo Marín Septiembre 2011 ISSN 1576-7264 Depósito legal A-646-2000 Abstract This article deals with the uncapacitated multiple allocation phub median problem, where p facilities (hubs) must be located among n available sites in order to minimize the transportat...

in the new production systems, finding a way to improving the product and system reliability in design is a very important. the reliability of the products and systems may improve using different methods. one of this methods is redundancy allocation problem. in this problem by adding redundant component to sub-systems under some constraints, the reliability improved. in this paper we worked on ...

................................................................................................................................................... 9 CHAPTER 1: INTRODUCTION .................................................................................................................. 11 1.1 BACKGROUND .............................................................................................