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| Author | : Mayur Vamanan |
| Publisher | : |
| Total Pages | : 156 |
| Release | : 2000 |
| Genre | : |
| ISBN | : |
| Author | : Michael A. Völkel |
| Publisher | : Logos Verlag Berlin GmbH |
| Total Pages | : 119 |
| Release | : 2020-07-03 |
| Genre | : Mathematics |
| ISBN | : 3832551077 |
This book deals with inventory systems in supply chains that face risks that could render products unsalable. These risks include possible cooling system failures, transportation risks, packaging errors, handling errors, or natural quality deterioration over time like spoilage of food or blood products. Classical supply chain inventory models do not regard these risks. This thesis introduces novel cost models that consider these risks. It also analyzes how real-time tracking with RFID sensors and smart containers can contribute to decision making. To solve these cost models, this work presents new solution methods based on dynamic programming. In extensive computational studies both with experimental as well as real-life data from large players in the retailer industry, the solution methods prove to lead to substantially lower costs than existing solution methods and heuristics.
| Author | : Gaetan Deletoille |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2022 |
| Genre | : |
| ISBN | : |
We consider a large scale multi-item periodic-review stochastic inventory system with Minimum Order Quantity (MOQ) requirements on the total order size of all items. The item demands are stochastic and non-stationary. The retailer must decide at each time period whether and how many of each item to order from the supplier. The goal is to maximize the reward generated by satisfying the end customers demands while minimizing the costs of holding unsold inventory. We introduce a parameterized heuristic, the w-policy, that relies on our detailed analysis of the problem.We demonstrate the scalability of this heuristic up to ten thousand items, which is unmatched in the literature on the non-stationary demand version of the MOQ problem. The results of our numerical study on large scale real world data sets exhibit the efficiency of the w-policy in these challenging settings. Moreover, our numerical study shows that the w-policy performs at least as well as the state-of-the-art method (S,T) on the simplified problem when the demand is considered stationary, while being more robust in a real supply chain environment.Our results therefore indicate that the w-policy is more robust, has a larger scope of applicability, and is significantly more scalable than state of the art methods for multi-item stochastic inventory control with MOQ requirements.
| Author | : Karin Möllering |
| Publisher | : Kölner Wissenschaftsverlag |
| Total Pages | : 196 |
| Release | : 2007 |
| Genre | : |
| ISBN | : 3937404341 |
| Author | : Erik van der Sluis |
| Publisher | : Thesis Pub |
| Total Pages | : 152 |
| Release | : 1993 |
| Genre | : Technology & Engineering |
| ISBN | : 9789051702163 |
In the first part of this book deterministic single-product, multi-product and distribution problems are examined. Heuristic and optimal solutions for problems with constant and time-varying demand are discussed. Special attention is paid to the choice of the planning horizon. In the second part rolling horizon procedures are applied in stochastic single-product, multi-product and multi-retailer systems
| Author | : Marc de Bodt |
| Publisher | : |
| Total Pages | : 58 |
| Release | : 2015-08-05 |
| Genre | : Business & Economics |
| ISBN | : 9781332256280 |
Excerpt from Continuous-Review Policies for a Multi-Echelon Inventory Problem With Stochastic Demand Continuous-Review Policies for a Multi-Echelon Inventory Problem With Stochastic Demand was written by Marc de Bodt and Stephen C. Graves in 1982. This is a 58 page book, containing 5607 words and 5 pictures. Search Inside is enabled for this title. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
| Author | : |
| Publisher | : |
| Total Pages | : 272 |
| Release | : 2004 |
| Genre | : Inventory control |
| ISBN | : |
| Author | : Jing-Sheng Jeannette Song |
| Publisher | : |
| Total Pages | : 47 |
| Release | : 2016 |
| Genre | : |
| ISBN | : |
We consider a single-product, two-source inventory system with Poisson demand and backlogging. Inventory can be replenished through a normal supply source, which consists of a two-stage tandem queue with exponential production time at each stage. We can also place an emergency order by skipping the first stage, for a fee. There is no fixed order cost. There are linear order, holding and backorder costs. Through a new approach, we obtain optimal ordering policies for the discounted or long-run average cost, and also characterize near-optimal heuristic policies. The approach consists of four steps. The first step is to establish an equivalent system, in the sense that it has the same optimal policy as the original system. The second step is to construct a tandem queueing system, where costs are charged in accord with the equivalent system's cost structure. The third step derives an optimal control of the service rate at each server so as to minimize the tandem queue's system-wide cost. The fourth and final step is to translate the queue's optimal policy to an optimal policy for the equivalent system and hence the original system.
| Author | : Haolin Feng |
| Publisher | : |
| Total Pages | : 30 |
| Release | : 2008 |
| Genre | : |
| ISBN | : |
This paper analyzes optimal replenishment policies that minimize expected discounted cost of multi-product stochastic inventory systems. The distinguishing feature of the multi-product inventory system that we analyze is the existence of correlated demand and joint-replenishment costs across multiple products. While prior literature on multi-product stochastic inventory systems has focused on computation of heuristic policies that decouple the N product problem to N single product problems, our focus is on computing and finding the structure of the optimal policies for multi-product inventory systems, particularly when demand is correlated across products. The problem is formulated as a Markov Decision Process (MDP). A method to compute the optimal policy that uses a moving boundary based policy improvement scheme is proposed. Numerical examples show that the (s, c, d, S) policy closely approximates the optimal policy, and can significantly outperform the (s, c, S), P (s, S) and Q(s, S) policies analyzed in prior literature which assume independent demand.
| Author | : Han Zhu |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2020 |
| Genre | : |
| ISBN | : |
As a supplement to Zhu et al. (2020), this document consists of five parts. First, it provides technical proofs of some theoretical results in Zhu et al. (2020). Second, it introduces some preliminary results on stochastic distribution systems with fixed shipment costs. Third, it provides some examples and illustrations on the modified echelon (r,Q) policies (and some related concepts) studied in Zhu et al. (2020). Fourth, it presents some explicit performance bounds that depends on system primitives for the modified echelon (r,Q) policies in stochastic distribution systems. Finally, extensive numerical experiments are conducted to test the effectiveness of the modified echelon (r,Q) policies. Specifically, the numerical studies show that the modified echelon (r,Q) policies perform well with an average gap of about 5% above the cost lower bound, 2) outperform the echelon-stock (r, Q) policy used in Chen and Zheng (1997), and 3) have robust performances with respect to the allocation rule at the warehouse.
