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Dive into the research topics where G.J.J.A.N. van Houtum is active.

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Featured researches published by G.J.J.A.N. van Houtum.


European Journal of Operational Research | 2009

A new partial pooling structure for spare parts networks

A.A. Kranenburg; G.J.J.A.N. van Houtum

Motivated by real-life spare parts networks, we introduce a new spare parts inventory model with lateral transshipment. We consider a multi-item, multi-location, single-echelon system with base stock control and aggregate mean waiting time constraints. The local warehouses are divided into two types: main and regular local warehouses. Lateral transshipment is allowed from main local warehouses only. A practical advantage of this structure is that only a limited number of local warehouses has to be equipped to provide lateral transshipment. This structure represents a new form of partial pooling, with no pooling (zero main locals) and full pooling (zero regular locals) as special cases. We develop an accurate and fast approximate evaluation method, and exploit this method in a heuristic procedure for the base stock level determination. We show that only a small number of main locals is sufficient to obtain most of the full pooling benefits. We also apply our methods to case data of ASML, an original equipment manufacturer in the semiconductor supplier industry. As a result of our work ASML was able to improve spare parts planning.


International Journal of Production Economics | 2001

Spare parts management at complex technology-based organizations: an agenda for research

W.D. Rustenburg; G.J.J.A.N. van Houtum; W.H.M. Zijm

This paper explores the applicability of sophisticated models and techniques for spare parts inventory management within a highly technology-driven environment, viz. the Royal Netherlands Navy. In particular, we discuss the structure of the so-called VARI-METRIC models, a set of tools that has been designed for decision support in spare parts management, initially in a military organization. These tools aim at a high availability of complete technical systems, as opposed to more classical inventory management approaches, that are primarily directed towards a high availability of individual items. Unfortunately, the VARI-METRIC models suffer from a series of limiting assumptions that are not satisfied in most technology-based large organizations. We identify these shortcomings and suggest a research agenda to deal with these issues. Important extensions include the study of capacitated systems, and the study of hybrid product structures, consisting of both repairable and consumable parts. When consumption and condemnation occur (i.e. not every broken part can be repaired), the operational availability of systems during their exploitation period becomes a function of the allocated resupply budgets. This highly important field, relating issues such as maintenance policies, spare parts repair and resupply, to concepts of life cycle management, seems unexplored so far.


Reliability Engineering & System Safety | 2017

Condition based spare parts supply

X. Lin; R.J.I. Basten; A.A. Kranenburg; G.J.J.A.N. van Houtum

We consider a spare parts stock point that serves an installed base of machines. Each machine contains the same critical component, whose degradation behavior is described by a Markov process. We consider condition based spare parts supply, and show that an optimal, condition based inventory policy is 20% more efficient on average than a standard, state-independent base stock policy. We further propose an efficient and effective heuristic policy.


Operations Research Letters | 2007

Cost optimization in the (S-1,S) lost sales inventory model with multiple demand classes

A.A. Kranenburg; G.J.J.A.N. van Houtum

For the (S-1,S) lost sales inventory model with multiple demand classes that have different lost sales penalty cost parameters, three accurate and efficient heuristic algorithms are presented that, at a given base stock level, aim to find optimal values for the critical levels, i.e., values that minimize inventory holding and penalty cost.


Journal of the Operational Research Society | 2008

Service differentiation in spare parts inventory management

A.A. Kranenburg; G.J.J.A.N. van Houtum

The contemporary after-sales market is of increasing importance. One of the features required by the market is to provide differentiated service levels to different groups of customers. We use critical levels as a means to offer differentiation. Critical level policies aim to exploit the differences in target service levels by inventory rationing. In our multi-item single-location spare parts inventory model, we aim to minimize the spare parts provisioning cost, that is inventory holding and transportation cost, under the condition that aggregate mean waiting time constraints for all customer groups are met. In a computational experiment and a case study with data from a company in the semiconductor supplier industry, we show that significant cost reductions can be obtained when critical level policies are used instead of base stock policies (ie policies without critical levels).


Iie Transactions | 2000

Spare parts management for technical systems : resupply of spare parts under limited budgets

W.D. Rustenburg; G.J.J.A.N. van Houtum; W.H.M. Zijm

Abstract In this paper, we study the operational availability of a complex technical system consisting of several components. The components are subject to breakdowns, and hence for each component a limited number of spare parts are held in stock. If a systems component fails and it can not be replaced immediately, due to a lack of spares, the system becomes unavailable until a new component is installed. Failed components are disposed of and hence, to keep the spare parts stock at an appropriate level, new components have to be purchased. We assume that only a limited annual budget is available for procurement, while any further procurement requires a considerable lead time. We investigate at an aggregate level what budgets are needed to attain a target availability level for the system. In addition, we develop various operational strategies for spending the annual budget during each year. Numerical results indicate that the so-called Balance Focussed strategy provides the best results in terms of system availability as a function of time.


Statistica Neerlandica | 2003

Exact and approximate analysis of multi-echelon, multi-indenture spare parts systems with commonality

W.D. Rustenburg; G.J.J.A.N. van Houtum; W.H.M. Zijm

General spare parts networks, in which items are both repaired and stocked for future use have received considerable attention since the pathbreaking work of Sherbrooke [20] in 1968. In this chapter, we present both an exact and, under somewhat relaxed assumptions, a fast approximate evaluation method of fairly general multi-echelon, multi-indenture spare parts networks that serve to support the operation of technologically highly involved field systems. These evaluation methods provide the basis for a procedure to optimize the availability of these systems, given limited spare parts budgets. In this introductory section, we first describe the general structure of the networks we wish to study, and we motivate their importance. Next, we discuss some key references and finally summarize the main contributions of the current chapter.


Reliability Engineering & System Safety | 2017

Maintenance optimization under non-constant probabilities of imperfect inspections

J.P.C. Driessen; H. Peng; G.J.J.A.N. van Houtum

In this research, we study a single-component system that is characterized by three distinct deterioration states, cf. the Delay Time Model: normal, defective, and failed. The system is inspected periodically, and preventive system maintenance is done after a given number of inspections. The inspections are imperfect, and the probability of an inspection error changes over the systems operation time. Our objective is to minimize the average cost over an infinite time horizon. We present exact cost evaluations for a given maintenance policy, and we compare our model with non-constant probabilities to a model that considers constant probabilities of inspection errors. Our computational study illustrates that the model with constant probabilities may yield, on average, 19% higher costs than the model using non-constant probabilities of inspection errors. These values depend on the chosen parameter values, but still give an indication of how large the difference between both models can be. Finally, we also present an extension in which a reliability constraint (in terms of average failures per time unit) is added to our problem.


Central European Journal of Operations Research | 2013

Newsvendor characterizations for one-warehouse multi-retailer inventory systems with discrete demand under the balance assumption

Mustafa K. Doğru; A.G. (Ton) de Kok; G.J.J.A.N. van Houtum

This paper considers a one-warehouse multi-retailer inventory system that faces discrete stochastic demand of the customers. Under the so-called balance assumption (also known as the allocation assumption), base stock policies are optimal. Our main contribution is to show that the optimal base stock levels satisfy newsvendor characterizations, which are in terms of inequalities, and to extend the newsvendor equalities known for the continuous demand model. These characterizations are appealing because they (i) are easy to explain to nonmathematical oriented people like managers and MBA students, (ii) contribute to the understanding of optimal control, (iii) help intuition development by providing direct relation between cost and optimal policy parameters.


Operations, Logistics and Supply Chain Management | 2019

Maintenance Service Logistics

Jj Joachim Arts; R.J.I. Basten; G.J.J.A.N. van Houtum; Henk Zijm; M. Klumpp; A. Regattieri; Sunderesh Heragu

Capital goods, such as manufacturing equipment, trains, and industrial printers, are used in the primary processes of their users. Their availability is of key importance. To achieve high availability, maintenance is required throughout their long life cycles. Many different resources such as spare parts, service engineers and tools, are necessary to perform maintenance. In some cases, e.g. for trains, also maintenance facilities are required. Maintenance service logistics encompasses all processes that ensure that the resources required for maintenance are at the right place at the right time. In a broader sense, it also includes maintenance planning and design-for-maintenance. We first discuss capital goods and the requirements that their users have, which leads us to basic maintenance principles and the structure of typical service supply chains. Next, various relevant decisions and supporting theories and models are discussed. Finally, we discuss the latest developments within maintenance service logistics.

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A.A. Kranenburg

Eindhoven University of Technology

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I.J.B.F. Adan

Eindhoven University of Technology

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R.J.I. Basten

Eindhoven University of Technology

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W.H.M. Zijm

Eindhoven University of Technology

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A.C.C. van Wijk

Eindhoven University of Technology

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A.G. (Ton) de Kok

Eindhoven University of Technology

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J.P.C. Driessen

Eindhoven University of Technology

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