Publicaties
Practical factors in order picking planning Universiteit Antwerpen
Market trends such as globalisation, increasing customer expectations, expensive industrial land and high labour costs cause a need for efficient order picking systems in practice. However, managers often do not implement findings from academic research on order picking planning into practice because researchers hardly account for practical factors (e.g. high-level storage, human factors, pick vehicle properties) or make unrealistic assumptions ...
Scattered storage assignment Universiteit Antwerpen
In scattered storage, individual items are intentionally distributed across multiple positions in the picking area. Especially in e- commerce environments, where orders typically consist of a few items in small quantities, such a storage policy can reduce picking travel times by increasing the likelihood that items belonging to the same order can be found in nearby positions. In this paper, we propose a scattered storage policy that, when ...
Analysis of the impact of responsiveness on the capital cost of a make-to-order multiproduct batch plant Universiteit Antwerpen
Most academic models for strategic design of batch production plants focus on minimising capital and operational costs. However nowadays, responsiveness is an important key performance attribute in operations management. The main metric for respon- siveness is the delivery lead time (DLT), being defined as the time between ordering and delivering of a customer order, also called the order fulfillment cycle time. In the context of plant design, ...
The internal warehouse replenishment problem Universiteit Antwerpen
Storing inventory in both a reserve and forward area is a way to improve the eciency of a B2C warehouse. Due to the small size of the forward area order picking distances can be reduced, although internal replenishments from the reserve to the forward area are necessary to keep the warehouse up and running. In the warehouse literature, the organisation of a forward area is mostly studied from a tactical point of view, discussing the size of the ...
Multiperiod chemical batch plant design for a single product or mixed product campaign mode of operation Universiteit Antwerpen
The joint order batching and picker routing problem Universiteit Antwerpen
The joint order batching and picker routing problem (JOBPRP) is a promising approach to minimize the order picking travel distance in a picker-to-parts warehouse environment. In this paper, we show that the JOBPRP can be modelled as a clustered vehicle routing problem (CluVRP), a variant of the capacitated VRP in which customers are grouped into clusters. To solve this cluster-based model of the JOBPRP, we apply a two-level variable neighborhood ...
Solving the joint order batching and picker routing problem, as a clustered vehicle routing problem Universiteit Antwerpen
Scattered storage assignment Universiteit Antwerpen
Decomposition approaches for the design and scheduling of multiproduct multistage batch plants with parallel lines Universiteit Antwerpen
Multiproduct chemical batch plants, often equipped with parallel production lines, are facilities where similar products are produced by sharing available equipment and time. Hence, when designing such plants, the operational use should be considered simultaneously. In this paper, the design and scheduling problem of a batch plant with parallel lines is addressed, using the Resource-Task Network formulation. The proposed mixed-integer linear ...