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Yale T. Herer
Faculty of Industrial Engineering and Management Technion—Israel Institute of Technology Haifa 32000 Israel

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Original article
Published: 25 March 2021 in Production and Operations Management
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Recent advancements in Information Technology have provided an opportunity to significantly improve the effectiveness of inventory systems. The use of in‐cycle demand information enables faster reaction to demand fluctuations. In particular, for the newsvendor (NV) system, we exploit the newly available data to perform an additional review (AR) of inventory at an endogenously determined, a priori set time during the sales period, and perform an additional replenishment if necessary. We implemented our innovative model at a market‐leading media group. The results of the initial pilot were dramatic, indicating that the proposed model achieves an increase of 4%–24% in profits compared to the policy before implementation. As a result, the company started following the proposed model for all their printed magazines and observed a significant reduction in operational costs. In a generalized setting, we provide a tractable search‐based optimization algorithm, based on the problem’s structural properties, for determining the optimal initial quantity, AR timing, and quantity to restock at that time. Based on these theoretical results, we propose a simple heuristic that can be used for many practical situations including our implementation at Yedioth. Through a computational experiment, we show that our algorithm finds the optimal solution quickly and that the proposed heuristic performs well. We also provide additional insights into the problem—for instance, that our system exhibits properties similar to inventory pooling, provided that the demand rate is large enough.

ACS Style

Dina Smirnov; Yale T. Herer; Assaf Avrahami. Two‐Phase Newsvendor with Optimally Timed Additional Replenishment: Model, Algorithm, Case Study. Production and Operations Management 2021, 1 .

AMA Style

Dina Smirnov, Yale T. Herer, Assaf Avrahami. Two‐Phase Newsvendor with Optimally Timed Additional Replenishment: Model, Algorithm, Case Study. Production and Operations Management. 2021; ():1.

Chicago/Turabian Style

Dina Smirnov; Yale T. Herer; Assaf Avrahami. 2021. "Two‐Phase Newsvendor with Optimally Timed Additional Replenishment: Model, Algorithm, Case Study." Production and Operations Management , no. : 1.

Journal article
Published: 15 February 2021 in Sustainability
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Last-mile logistics is both a source and cause of problems in urban areas, especially problems related to traffic congestion, unsustainable delivery modes, and limited parking availability. In this context, multiple sustainable logistics solutions have been proposed. We focus on micro-depots (MDs), which can function as a consolidation center and a collection-and-delivery point for business-to-consumer (B2C) small parcels. This paper presents a new research idea that extends the existing MD solution by introducing the concept of a shared MD network with parcel lockers. Such networks enable multiple logistics service providers (LSPs) and/or business partners to use an MD while minimizing their individual costs and optimizing the use of urban space. We present case studies of such shared MD networks operating in the cities of Helsinki and Helmond. We provide a framework for auxiliary businesses that can exploit the existing MD structure to offer services to the surrounding population. Finally, we define metrics for evaluating the success of shared MD networks while considering social, environmental and economic objectives. The case studies highlight the complexity of implementing such a solution; it requires stakeholders’ involvement and collaboration. In particular, deciding on the location for a shared MD network is a critical phase, since local authorities have their own regulations, and residents’ preferences are usually different than LSPs’ ones. Nevertheless, if these challenges are overcome, this sustainable last-mile logistics solution has a promising future.

ACS Style

Leonardo Rosenberg; Noemie Balouka; Yale Herer; Eglantina Dani; Paco Gasparin; Kerstin Dobers; David Rüdiger; Pete Pättiniemi; Peter Portheine; Sonja van Uden. Introducing the Shared Micro-Depot Network for Last-Mile Logistics. Sustainability 2021, 13, 2067 .

AMA Style

Leonardo Rosenberg, Noemie Balouka, Yale Herer, Eglantina Dani, Paco Gasparin, Kerstin Dobers, David Rüdiger, Pete Pättiniemi, Peter Portheine, Sonja van Uden. Introducing the Shared Micro-Depot Network for Last-Mile Logistics. Sustainability. 2021; 13 (4):2067.

Chicago/Turabian Style

Leonardo Rosenberg; Noemie Balouka; Yale Herer; Eglantina Dani; Paco Gasparin; Kerstin Dobers; David Rüdiger; Pete Pättiniemi; Peter Portheine; Sonja van Uden. 2021. "Introducing the Shared Micro-Depot Network for Last-Mile Logistics." Sustainability 13, no. 4: 2067.

Journal article
Published: 01 October 2014 in Interfaces
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ACS Style

Assaf Avrahami; Yale T. Herer; Retsef Levi. Matching Supply and Demand: Delayed Two-Phase Distribution at Yedioth Group—Models, Algorithms, and Information Technology. Interfaces 2014, 44, 445 -460.

AMA Style

Assaf Avrahami, Yale T. Herer, Retsef Levi. Matching Supply and Demand: Delayed Two-Phase Distribution at Yedioth Group—Models, Algorithms, and Information Technology. Interfaces. 2014; 44 (5):445-460.

Chicago/Turabian Style

Assaf Avrahami; Yale T. Herer; Retsef Levi. 2014. "Matching Supply and Demand: Delayed Two-Phase Distribution at Yedioth Group—Models, Algorithms, and Information Technology." Interfaces 44, no. 5: 445-460.

Journal article
Published: 01 May 2013 in European Journal of Operational Research
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ACS Style

Deniz Özdemir; Enver Yücesan; Yale T. Herer. Multi-location transshipment problem with capacitated production. European Journal of Operational Research 2013, 226, 425 -435.

AMA Style

Deniz Özdemir, Enver Yücesan, Yale T. Herer. Multi-location transshipment problem with capacitated production. European Journal of Operational Research. 2013; 226 (3):425-435.

Chicago/Turabian Style

Deniz Özdemir; Enver Yücesan; Yale T. Herer. 2013. "Multi-location transshipment problem with capacitated production." European Journal of Operational Research 226, no. 3: 425-435.

Journal article
Published: 01 January 2013 in Journal of Theoretical and Applied Electronic Commerce Research
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In recent years the print industry has been facing constant and increasing competition from the double onslaught of the Internet and the proliferation of television channels. In order to survive as a viable industry, print enterprises must streamline and exploit up-to-date economizing measures. A key cost element in the print industry is paper, representing between 20% and 30% of total printing expenditures. Thus, any improvement in the operational efficiency of paper reel management has the potential of yielding considerable cost savings. It is in this context that we analyze the effect of enhancing the available paper reel supply chain information through the use of semi passive Radio Frequency IDentification (RFID) technology. Focusing on the printing house, we develop both simulation models and formulas that forecast savings from having better information. Thereafter we implemented the system and compared the forecasts to actual savings. Using standard economic evaluation techniques we unequivocally show the economic imperative of introducing semi passive RFID technology. Even though this study was carried out in a specific printing house, we argue that its implications are far wider, affecting other industries.

ACS Style

Assaf Avrahami; Yale T. Herer; Avraham Shtub. Printing House Paper Reel Management: An RFID Enabled Information Rich Approach. Journal of Theoretical and Applied Electronic Commerce Research 2013, 8, 17 -18.

AMA Style

Assaf Avrahami, Yale T. Herer, Avraham Shtub. Printing House Paper Reel Management: An RFID Enabled Information Rich Approach. Journal of Theoretical and Applied Electronic Commerce Research. 2013; 8 (2):17-18.

Chicago/Turabian Style

Assaf Avrahami; Yale T. Herer; Avraham Shtub. 2013. "Printing House Paper Reel Management: An RFID Enabled Information Rich Approach." Journal of Theoretical and Applied Electronic Commerce Research 8, no. 2: 17-18.

Conference paper
Published: 01 December 2009 in Proceedings of the 2009 Winter Simulation Conference (WSC)
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We consider a supply chain, which consists of N stocking locations and one supplier. The locations may be coordinated through replenishment strategies and lateral transshipments, i.e., transfer of a product among locations at the same echelon level. The supplier has limited production capacity. Therefore, the total amount of product supplied to the N locations is limited in each time period. When total replenishment orders exceed total supply, not all locations will be able to attain their base stock values. Therefore, different allocation rules are considered to specify how the supplier rations its limited capacity among the locations. We team up the modeling flexibility of simulation with sample path optimization to address the multi-location transshipment problem. We solve the sample average approximation problem by random search and by gradient search. With this numerical approach, we can study problems with non-identical costs and correlated demand structures.

ACS Style

Deniz Ozdemir; Enver Yücesan; Yale T. Herer. Sample average approximation approach to multi-location transshipment problem with capacitated production. Proceedings of the 2009 Winter Simulation Conference (WSC) 2009, 2384 -2394.

AMA Style

Deniz Ozdemir, Enver Yücesan, Yale T. Herer. Sample average approximation approach to multi-location transshipment problem with capacitated production. Proceedings of the 2009 Winter Simulation Conference (WSC). 2009; ():2384-2394.

Chicago/Turabian Style

Deniz Ozdemir; Enver Yücesan; Yale T. Herer. 2009. "Sample average approximation approach to multi-location transshipment problem with capacitated production." Proceedings of the 2009 Winter Simulation Conference (WSC) , no. : 2384-2394.

Journal article
Published: 31 July 2009 in Computers & Operations Research
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This paper presents power-of-two policies for a single-warehouse multi-retailer system. In this system, discounts on the purchasing cost based on order frequency are given to the warehouse. Models with assumptions analogous to the EOQ environment are discussed for all-unit and incremental order frequency discounts. 94%-effective power-of-two policies are developed for both models. For incremental discounts, a 98%-effective power-of-two policy for a variable base planning period is also derived. For each model, a computational study shows every test problem considered has a power-of-two policy that is over 96% effective. An extension to holding costs that are dependent on the purchasing price is also provided.

ACS Style

Brian Q. Rieksts; José A. Ventura; Yale T. Herer. Power-of-two policies for single-warehouse multi-retailer inventory systems with order frequency discounts. Computers & Operations Research 2009, 36, 2286 -2294.

AMA Style

Brian Q. Rieksts, José A. Ventura, Yale T. Herer. Power-of-two policies for single-warehouse multi-retailer inventory systems with order frequency discounts. Computers & Operations Research. 2009; 36 (7):2286-2294.

Chicago/Turabian Style

Brian Q. Rieksts; José A. Ventura; Yale T. Herer. 2009. "Power-of-two policies for single-warehouse multi-retailer inventory systems with order frequency discounts." Computers & Operations Research 36, no. 7: 2286-2294.

Conference paper
Published: 01 December 2006 in Proceedings of the 2006 Winter Simulation Conference
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We consider coordination among stocking locations through replenishment strategies that explicitly take into account lateral transshipments, i.e., transfer of a product among locations at the same echelon level. The basic contribution of our research is the incorporation of supply capacity into the traditional emergency transshipment model. We formulate the capacitated production case as a network flow problem embedded in a stochastic optimization problem. We develop a solution procedure based on infinitesimal perturbation analysis (IPA) to solve the stochastic optimization problem numerically. We analyze the impact on system behavior and on stocking locations' performance when the supplier may fail to fulfil all the replenishment orders and the unmet demand is lost. We find that depending on the production capacity, system behavior can vary drastically. Moreover, in a production-inventory system, we find evidence that either capacity flexibility (i.e., extra production) or transshipment flexibility is required to maintain a certain level of service

ACS Style

Deniz Ozdemir; Enver Yücesan; Yale T. Herer. Multi-Location Transshipment Problem with Capacitated Production and Lost Sales. Proceedings of the 2006 Winter Simulation Conference 2006, 1470 -1476.

AMA Style

Deniz Ozdemir, Enver Yücesan, Yale T. Herer. Multi-Location Transshipment Problem with Capacitated Production and Lost Sales. Proceedings of the 2006 Winter Simulation Conference. 2006; ():1470-1476.

Chicago/Turabian Style

Deniz Ozdemir; Enver Yücesan; Yale T. Herer. 2006. "Multi-Location Transshipment Problem with Capacitated Production and Lost Sales." Proceedings of the 2006 Winter Simulation Conference , no. : 1470-1476.

Journal article
Published: 16 November 2006 in European Journal of Operational Research
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We consider coordination among stocking locations through replenishment strategies that take explicitly into consideration transshipments, transfer of a product among locations at the same echelon level. We incorporate transportation capacity such that transshipment quantities between stocking locations are bounded due to transportation media or the location’s transshipment policy. We model different cases of transshipment capacity as a capacitated network flow problem embedded in a stochastic optimization problem. Under the assumption of instantaneous transshipments, we develop a solution procedure based on infinitesimal perturbation analysis to solve the stochastic optimization problem, where the objective is to find the policy that minimizes the expected total cost of inventory, shortage, and transshipments. Such a numerical approach provides the flexibility to solve complex problems. Investigating two problem settings, we show the impact of transshipment capacity between stocking locations on system behavior. We observe that transportation capacity constraints not only increase total cost, they also modify the inventory distribution throughout the network.

ACS Style

Deniz Özdemir; Enver Yücesan; Yale T. Herer. Multi-location transshipment problem with capacitated transportation. European Journal of Operational Research 2006, 175, 602 -621.

AMA Style

Deniz Özdemir, Enver Yücesan, Yale T. Herer. Multi-location transshipment problem with capacitated transportation. European Journal of Operational Research. 2006; 175 (1):602-621.

Chicago/Turabian Style

Deniz Özdemir; Enver Yücesan; Yale T. Herer. 2006. "Multi-location transshipment problem with capacitated transportation." European Journal of Operational Research 175, no. 1: 602-621.

Original articles
Published: 01 November 2006 in International Journal of Production Research
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In this article we compare two apparently dissimilar scheduling problems. The Small Batch Assembly Line Balancing problem is the process of dividing operations over multiple stations so as to produce a series of parts whose processing times are characterized by learning. The Lot Streaming in a Flow Shop problem is the process of splitting a given lot or job to allow overlap of successive operations in multi-stage production systems, thereby reducing the makespan of the corresponding schedule. We show that the two problems are formally equivalent. By exploring the mathematical equivalence of the two problems, a number of unexpected new results have been obtained.

ACS Style

Celia A. Glass; Yale T. Herer. On the equivalence of small batch assembly line balancing and lot streaming in a flow shop. International Journal of Production Research 2006, 44, 4587 -4606.

AMA Style

Celia A. Glass, Yale T. Herer. On the equivalence of small batch assembly line balancing and lot streaming in a flow shop. International Journal of Production Research. 2006; 44 (21):4587-4606.

Chicago/Turabian Style

Celia A. Glass; Yale T. Herer. 2006. "On the equivalence of small batch assembly line balancing and lot streaming in a flow shop." International Journal of Production Research 44, no. 21: 4587-4606.

Original articles
Published: 01 November 2005 in IIE Transactions
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In certain types of processes, verification of the quality of the output units is possible only after the entire batch has been processed. We develop a model that prescribes which units should be inspected and how the units that were not inspected should be disposed of, in order to minimize the expected sum of inspection costs and disposition error costs, for processes that are subject to random failure and recovery. The model is based on a dynamic programming algorithm that has a low computational complexity. The study also includes a sensitivity analysis under a variety of cost and probability scenarios, supplemented by an analysis of the smallest batch that requires inspection, the expected number of inspections, and the performance of an easy to implement heuristic.

ACS Style

Alexander Finkelshtein; Yale T. Herer; Tzvi Raz; Irad Ben-Gal. Economic optimization of off-line inspection in a process subject to failure and recovery. IIE Transactions 2005, 37, 995 -1009.

AMA Style

Alexander Finkelshtein, Yale T. Herer, Tzvi Raz, Irad Ben-Gal. Economic optimization of off-line inspection in a process subject to failure and recovery. IIE Transactions. 2005; 37 (11):995-1009.

Chicago/Turabian Style

Alexander Finkelshtein; Yale T. Herer; Tzvi Raz; Irad Ben-Gal. 2005. "Economic optimization of off-line inspection in a process subject to failure and recovery." IIE Transactions 37, no. 11: 995-1009.

Journal article
Published: 01 June 2000 in Management Science
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We consider the case of a batch of discrete units produced by a process subject to failures under a known probability distribution function, and apply information theory to the problem of finding the first nonconforming unit in the batch at minimum cost. Two distinct but related aspects of this problem were treated: determining which units should be inspected, and determining how many units should be sent for inspection at the same time. The solution is based on the principles of inspecting the product units that maximize the reduction in the uncertainty regarding the location of the first nonconforming unit, and of minimizing the cost per unit of uncertainty reduced. These principles are formalized by means of a series of theorems leading to an easy-to-implement algorithm for managing parallel inspection. This approach is successfully compared with the optimal solution obtained with dynamic programming and with other heuristics.inspection planning, information theory

ACS Style

Yale T. Herer; Tzvi Raz. Optimal Parallel Inspection for Finding the First Nonconforming Unit in a Batch—An Information Theoretic Approach. Management Science 2000, 46, 845 -857.

AMA Style

Yale T. Herer, Tzvi Raz. Optimal Parallel Inspection for Finding the First Nonconforming Unit in a Batch—An Information Theoretic Approach. Management Science. 2000; 46 (6):845-857.

Chicago/Turabian Style

Yale T. Herer; Tzvi Raz. 2000. "Optimal Parallel Inspection for Finding the First Nonconforming Unit in a Batch—An Information Theoretic Approach." Management Science 46, no. 6: 845-857.

Journal article
Published: 01 January 1997 in Production Planning & Control
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ACS Style

Yale T. Herer; Tzvi Raz. Further results in the optimal policy for imperfect inspection in discrete time. Production Planning & Control 1997, 8, 377 -384.

AMA Style

Yale T. Herer, Tzvi Raz. Further results in the optimal policy for imperfect inspection in discrete time. Production Planning & Control. 1997; 8 (4):377-384.

Chicago/Turabian Style

Yale T. Herer; Tzvi Raz. 1997. "Further results in the optimal policy for imperfect inspection in discrete time." Production Planning & Control 8, no. 4: 377-384.