This study discusses the integrated order batching, sequencing and routing problem (IOBSRP) in warehouses. Distinguished from the past studies, a comprehensive nonlinear mixed integer optimization model is developed to simultaneously determine three decisions, including order batching, batch...

To lower vessel turn time, it is crucial that the operations of quay cranes, yard trucks, and yard cranes are well coordinated. Most studies have sought to optimize each of these processes independently. Since the operations by quay cranes and yard trucks are highly interrelated it is necessary...

The buffer allocation problem (BAP) and the assembly line balancing problem (ALBP) are amongst the most studied problems in the literature on production systems. However they have been so far approached separately, although they are closely interrelated. This paper for the first time considers...

This paper addresses the optimization of a block stacking storage system (BSSS) in which unit loads are stored vertically. One of the important problems in a BSSS is in the relocation required when unit loads are located on top of the next unit load to be picked. Relocations are bound to occur...

This paper studies a job shop scheduling problem with two new objective functions based on the setup and synergy costs besides the traditional total weighted tardiness criterion. The background is found in the real-world situation of a commercial vehicle producer, where the reduction of...

Although there is an extensive set of literature on inventory management for perishable items, a majority of these operate at a higher level where all items are assumed to have a fixed shelf-life. However, depending on how they are handled in transit as well as during storage, the remaining...

In this study, a multi-item economic order quantity model with shortage under vendor managed inventory policy in a single vendor single buyer supply chain is developed. This model explicitly includes warehouse capacity and delivery constraints, bounds order quantity, and limits the number of...

This paper studies the problem of scheduling open shops with no intermediate buffer, called no-wait open shops under makespan minimization. No-wait scheduling problems arise in many realistic production environments such as hot metal rolling, the plastic molding, chemical and pharmaceutical,...

Many present markets for goods and services have highly volatile demand due to short life cycles and strong competition in saturated environments. Determination of capacity levels is difficult because capacities often need to be set long before demand realizes. In order to avoid capacity-demand...

This paper presents the implementation of a computer system in a bus body assembly line in Colombia, South America. The sequencing of the assembly line was formulated as a Resource Constraint Multi-Project Scheduling Problem. The proposed solution method was a classical Genetic Algorithm which...