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VENDOR MANAGEMENT OVERVIEW INVENTORY |
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Articles -
Logistics strategies
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Vendor Managment inventory (VMI) is a family business models in which the buyer of a product provides certain information to a supplier of that product and the vendor assumes all responsibility for maintaining an agreed inventory of the material, usually in the buyer's consumption location (usually a store). A logistics provider of third parties may also participate to ensure that the buyer has the required level of inventory by adjusting differences in supply and demand.
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PROBLEMS WITH ROUTING STOCHASTIC DEMAND |
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Articles -
Transport
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One of the most routing problems has worked in recent years is the stochastic-demand routing (VRP with stochastic demand). The problem is that we have a set of customers which should be visited by a fleet of trucks, each client needs a specific amount of product which is a random variable, which means is not known certainty the amount of product the customer needs.
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IN GENERAL THE DECISION MAKING |
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Articles -
Overview of Operations Research
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Decision making is a process where a person is confronted with a problem, and take an alternative set of options. In many cases there is a high level of uncertainty about the future and therefore can not be sure of the ultimate consequences of the decision. In general, the decision is in response to a decision problem where there is uncertainty, limited resources, among other factors.
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ORIGIN AND DEVELOPMENT OF MODELS OF DECISION IN THE ADMINISTRATION OF OPERATIONS |
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Articles -
Overview of Operations Research
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Until recently, decisions were made by a syllogistic process of deductive reasoning that we call intuition, however, in early 1900 and with a big jump during the Second World War, began to use mathematics in the service management operations. Although subjective knowledge is very important to consider the objectivity of mathematical models allows precise and give more certainty to our decisions.
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KNAPSACK PROBLEM: A COMMON PROBLEM IN LOGISTICS |
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Articles -
Methodologies and tools
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The knapsack problem is one of the most common combination in combinatorial problems, and have major applications in the context of operations management and logistics.
The approach of the knapsack problem is as follows: Suppose we are given n objects and a backpack. For i = 1,2, ... .., n, the object i have a positive weight wi and a positive value Vi. The backpack can carry a weight that although not on WM. The objective of this problem is to fill the bag so as to maximize the value of items carried, case observing the capacity constraint imposed.
Therefore the problem can be mathematically defined as:
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