Performance Analysis And Capacity Planning Of Multi Stage Stochastic Order Fulfilment Systems With Levelled Order Release And Order Deadlines

Author : Mohring, Uta
Publisher : KIT Scientific Publishing
ISBN 13 : 3731512114
Total Pages : 282 pages
Book Rating : 4.10/5 ( download)

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Download or read book Performance Analysis and Capacity Planning of Multi-stage Stochastic Order Fulfilment Systems with Levelled Order Release and Order Deadlines written by Mohring, Uta and published by KIT Scientific Publishing. This book was released on 2022-09-15 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Order fulfilment systems are forced to manage a volatile customer demand while meeting customer-required short order deadlines. To handle these challenges, we introduce the Strategy of Levelled Order Release (LOR) for workload balancing over time. The contributions of this work are (1) the workload balancing concept LOR, (2) a discrete-time Markov chain for performance analysis, and (3) an algorithm for capacity planning under performance constraints in order fulfilment systems with LOR.

Author : Kai Huang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.30/5 ( download)

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Download or read book The Value of Multi-stage Stochastic Programming in Capacity Planning Under Uncertainty written by Kai Huang and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Kai Huang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.95/5 ( download)

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Download or read book Multi-stage Stochastic Programming Models in Production Planning written by Kai Huang and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we study a series of closely related multi-stage stochastic programming models in production planning, from both a modeling and an algorithmic point of view. We first consider a very simple multi-stage stochastic lot-sizing problem, involving a single item with no fixed charge and capacity constraint. Although a multi-stage stochastic integer program, this problem can be shown to have a totally unimodular constraint matrix. We develop primal and dual algorithms by exploiting the problem structure. Both algorithms are strongly polynomial, and therefore much more efficient than the Simplex method. Next, motivated by applications in semiconductor tool planning, we develop a general capacity planning problem under uncertainty. Using a scenario tree to model the evolution of the uncertainties, we present a multi-stage stochastic integer programming formulation for the problem. In contrast to earlier two-stage approaches, the multi-stage model allows for revision of the capacity expansion plan as more information regarding the uncertainties is revealed. We provide analytical bounds for the value of multi-stage stochastic programming over the two-stage approach. By exploiting the special simple stochastic lot-sizing substructure inherent in the problem, we design an efficient approximation scheme and show that the proposed scheme is asymptotically optimal. We conduct a computational study with respect to a semiconductor-tool-planning problem. Numerical results indicate that even an approximate solution to the multi-stage model is far superior to any optimal solution to the two-stage model. These results show that the value of multi-stage stochastic programming for this class of problem is extremely high. Next, we extend the simple stochastic lot-sizing model to an infinite horizon problem to study the planning horizon of this problem. We show that an optimal solution of the infinite horizon problem can be approximated by optimal solutions of a series of finite horizon problems, which implies the existence of a planning horizon. We also provide a useful upper bound for the planning horizon.

Author : Yan Xia
Publisher :
ISBN 13 :
Total Pages : 43 pages
Book Rating : 4.15/5 ( download)

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Download or read book Influence of Positive Order Fulfillment Time in Batch Production System℗ written by Yan Xia and published by . This book was released on 2012 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: In batch production systems with zero fulfillment time, inventory on all items has to be maintained to respond to stochastic customer demand. Meeting a desired service level would require high safety stock levels. Cyclical inventory cost is charged to each make-to-stock (MTS) item. These two types of costs lead to an expensive inventory holding policy. However if customer contracts can be revised with positive fulfillment time, there is an opportunity to reduce both types of inventory costs. The positive order fulfillment time allows the manufacturer to reduce safety stock by scheduling production in response to arriving orders and to reduce cyclical inventory cost by converting some items to make-to-order (MTO). This research considers a formal approach to determine a policy to minimize the inventory cost with desired service level and positive order fulfillment time. Our production system is a single server multi-item system with constant order fulfillment time and homogeneous stochastic processing time, hence, it can be modeled as an M/G/1 queue. In addition, the queue operates on a first-come-first-serve (FCFS) scheduling rule. For this type of system, we derive the conditions under which a pure MTO policy can be applied. We also use a mixed-integer nonlinear programming model to determine a combined MTS/MTO policy when pure MTO is not feasible. In terms of this combined MTO/MTS policy, through numerical study we show the percentage of items that will be MTO is dependent on initial system load and the order fulfilment time. We also find out that we expect to save more, from this combined MTO/MTS, facing a system with a small initial load and a long order fulfillment time. Moreover, an item with small arrival rate, large order size mean and large unit time holding cost is more likely to be MTO. This should result in insights for a manufacturer using combined MTS/MTO policy with positive order fulfillment time.

Author :
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4./5 ( download)

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Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1973-10 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.

Author : Berend Denkena
Publisher : Academic Press
ISBN 13 : 0128126000
Total Pages : 494 pages
Book Rating : 4.04/5 ( download)

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Download or read book Cyber-Physical and Gentelligent Systems in Manufacturing and Life Cycle written by Berend Denkena and published by Academic Press. This book was released on 2017-06-07 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyber-Physical and Gentelligent Systems in Manufacturing and Life Cycle explores the latest technologies resulting from the integration of sensing components throughout the production supply chain, and the resulting possibilities to improve efficiency, flexibility, and product quality. The authors present cutting edge research into data storage in components, communication devices, data acquisition, as well as new industrial applications. Detailed technical descriptions of the tools are presented in addition to discussions of how these systems have been used, the benefits they provide, and what industry problems they could tackle in the future. This is essential reading for researchers and production engineers interested in the potential of cyber physical systems to optimize all parts of the supply chain. Addresses applications of cyber physical systems throughout the product lifecycle, including design, manufacture, and maintenance Features five industry case studies examining tools in different stages of the production chain Provides an invaluable recap of 12 years of advances in digitization of production processes and the implementation of intelligent systems Explores how these technologies could be used to solve problems in the future

Author : Jeffrey W. Herrmann
Publisher : Springer Science & Business Media
ISBN 13 : 0387331174
Total Pages : 331 pages
Book Rating : 4.71/5 ( download)

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Download or read book Handbook of Production Scheduling written by Jeffrey W. Herrmann and published by Springer Science & Business Media. This book was released on 2006-08-18 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book concentrates on real-world production scheduling in factories and industrial settings. It includes industry case studies that use innovative techniques as well as academic research results that can be used to improve production scheduling. Its purpose is to present scheduling principles, advanced tools, and examples of innovative scheduling systems to persons who could use this information to improve their own production scheduling.

Author :
Publisher :
ISBN 13 : 9789038608693
Total Pages : 72 pages
Book Rating : 4.91/5 ( download)

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Download or read book Warehouse Design and Control written by and published by . This book was released on 1999 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Phillip A. Laplante
Publisher : Wiley-IEEE Press
ISBN 13 :
Total Pages : 392 pages
Book Rating : 4.74/5 ( download)

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Download or read book Real-Time Systems Design and Analysis written by Phillip A. Laplante and published by Wiley-IEEE Press. This book was released on 1997 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: "IEEE Press is pleased to bring you this Second Edition of Phillip A. Laplante's best-selling and widely-acclaimed practical guide to building real-time systems. This book is essential for improved system designs, faster computation, better insights, and ultimate cost savings. Unlike any other book in the field, REAL-TIME SYSTEMS DESIGN AND ANALYSIS provides a holistic, systems-based approach that is devised to help engineers write problem-solving software. Laplante's no-nonsense guide to real-time system design features practical coverage of: Related technologies and their histories Time-saving tips * Hands-on instructions Pascal code Insights into decreasing ramp-up times and more!"

Author : Turan Paksoy
Publisher : CRC Press
ISBN 13 : 1000245101
Total Pages : 369 pages
Book Rating : 4.03/5 ( download)

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Download or read book Logistics 4.0 written by Turan Paksoy and published by CRC Press. This book was released on 2020-12-17 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial revolutions have impacted both, manufacturing and service. From the steam engine to digital automated production, the industrial revolutions have conduced significant changes in operations and supply chain management (SCM) processes. Swift changes in manufacturing and service systems have led to phenomenal improvements in productivity. The fast-paced environment brings new challenges and opportunities for the companies that are associated with the adaptation to the new concepts such as Internet of Things (IoT) and Cyber Physical Systems, artificial intelligence (AI), robotics, cyber security, data analytics, block chain and cloud technology. These emerging technologies facilitated and expedited the birth of Logistics 4.0. Industrial Revolution 4.0 initiatives in SCM has attracted stakeholders’ attentions due to it is ability to empower using a set of technologies together that helps to execute more efficient production and distribution systems. This initiative has been called Logistics 4.0 of the fourth Industrial Revolution in SCM due to its high potential. Connecting entities, machines, physical items and enterprise resources to each other by using sensors, devices and the internet along the supply chains are the main attributes of Logistics 4.0. IoT enables customers to make more suitable and valuable decisions due to the data-driven structure of the Industry 4.0 paradigm. Besides that, the system’s ability of gathering and analyzing information about the environment at any given time and adapting itself to the rapid changes add significant value to the SCM processes. In this peer-reviewed book, experts from all over the world, in the field present a conceptual framework for Logistics 4.0 and provide examples for usage of Industry 4.0 tools in SCM. This book is a work that will be beneficial for both practitioners and students and academicians, as it covers the theoretical framework, on the one hand, and includes examples of practice and real world.