References of "International Journal of Production Economics"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailThe stochastic maintenance location routing allocation problem for rolling stock
Tönissen, Denise; Arts, Joachim UL

in International Journal of Production Economics (2020), 230

Detailed reference viewed: 70 (4 UL)
Full Text
Peer Reviewed
See detailForecasting spare part demand using service maintenance information
van der Auweraer, Sarah UL; Boute, Robert

in International Journal of Production Economics (2019), 213

We focus on the inventory management of critical spare parts that are used for service maintenance. These parts are commonly characterised by a large variety, an intermittent demand pattern and oftentimes ... [more ▼]

We focus on the inventory management of critical spare parts that are used for service maintenance. These parts are commonly characterised by a large variety, an intermittent demand pattern and oftentimes a high shortage cost. Specialized service parts models focus on improving the availability of parts whilst limiting the investment in inventories. We develop a method to forecast the demand of these spare parts by linking it to the service maintenance policy. The demand of these parts originates from the maintenance activities that require their use, and is thus related to the number of machines in the field that make use of this part (known as the active installed base), in combination with the part's failure behaviour and the maintenance plan. We use this information to predict future demand. By tracking the active installed base and estimating the part failure behaviour, we provide a forecast of the distribution of the future spare parts demand during the upcoming lead time. This forecast is in turn used to manage inventories using a base-stock policy. Through a simulation experiment, we show that our method has the potential to improve the inventory-service trade-off, i.e., it can achieve a certain cycle service level with lower inventory levels compared to the traditional forecasting techniques for intermittent spare part demand. The magnitude of the improvement increases for spare parts that have a large installed base and for parts with longer replenishment lead times. [less ▲]

Detailed reference viewed: 60 (6 UL)
Full Text
Peer Reviewed
See detailSimulation optimization for the stochastic economic lot scheduling problem with sequence-dependent setup times
Löhndorf, Nils UL; Riel, Manuel; Minner, Stefan

in International Journal of Production Economics (2014), 157

Detailed reference viewed: 18 (0 UL)
Full Text
Peer Reviewed
See detailRail Car Fleet Design: Optimization of Structure and Size
Klosterhalfen, Steffen UL; Kallrath, J.; Fischer, G.

in International Journal of Production Economics (2014), 157

We develop a model to determine the optimal structure and size of a rail car fleet at a chemical company under uncertainty in demand and travel times as well as substitution between rail car types. First ... [more ▼]

We develop a model to determine the optimal structure and size of a rail car fleet at a chemical company under uncertainty in demand and travel times as well as substitution between rail car types. First, we formulate an MILP model that accounts for the substitution relations between the types and minimizes the total direct rail car cost under given rail car availability constraints and a predefined maximum number of types. Second, based on the fleet structure obtained by the MILP model, the fleet size is computed by using an approximation from inventory theory that considers the existing uncertainties. Compared to the current approach of the rail car fleet management team, the model produces a reduction in safety stock of 120 rail cars and thus direct cost savings of 8% as well as further indirect cost savings due to a smaller number of rail car types, which reduces the switching effort of the rail cars on the storage tracks. [less ▲]

Detailed reference viewed: 97 (0 UL)
Full Text
Peer Reviewed
See detailMachine and labor flexibility in manufacturing networks
Francas, David; Löhndorf, Nils UL; Minner, Stefan

in International Journal of Production Economics (2011), 131(1), 165--174

Detailed reference viewed: 36 (0 UL)
Full Text
Peer Reviewed
See detailA Comparison of the Constant-Order and Dual-Index Policy for Dual Sourcing
Klosterhalfen, Steffen UL; Kiesmüller, Gudrun; Minner, Stefan

in International Journal of Production Economics (2011), 133(1), 302-311

We analyze a single-product, periodic-review, stochastic demand inventory model with backorders and two supply options, a regular and a more expensive expedited one, with deterministic, offsetting lead ... [more ▼]

We analyze a single-product, periodic-review, stochastic demand inventory model with backorders and two supply options, a regular and a more expensive expedited one, with deterministic, offsetting lead times. Since the optimal policy for such a problem is generally unknown, several simpler policies have been proposed in the literature, e.g., the single-index (SIP), dual-index (DIP), or constant-order policy (COP). In previous research the DIP has been found to perform closely to the optimal policy in specific numerical settings. The COP, on the other hand, is very appealing from a practical point of view. We explore the relative cost performance of these two policies in a numerical study to gain insights into appropriate policy choices. We find that in settings, where dual sourcing is most valuable, the simpler COP delivers satisfactory results, sometimes even better ones than the DIP, and therefore represents a legitimate policy alternative for practical situations. [less ▲]

Detailed reference viewed: 104 (2 UL)