The real-world production inventory systems involve uncertainties surrounding demand, production, defectiveness, and costs, which pose significant challenges. Various methodologies, including interval, fuzzy, stochastic, and fuzzy-stochastic approaches, have been developed to address these...

This paper presents a heuristic approach for solving the placement of Analog and Mixed-Signal Integrated Circuits. Placement is a crucial step in the physical design of integrated circuits. During this step, designers choose the position and variant of each circuit device. We focus on the...

Efficient management of waste generated in healthcare systems is crucial to minimize its environmental impact and ensure public health. Sustainable medical waste management (MWM) systems require careful network design, which can be achieved through optimization techniques. This work extends one...

The quadratic assignment problem (QAP) is one of the most important combinatorial optimization problems in theory and practice. In this paper, we are proposing a hierarchical data-driven parallel memetic algorithm to solve the problem. A component-based hierarchical system architecture with a...

Worker assignment problems are encountered in many production systems and are known to greatly influence system performances. We focus on dynamic problems where the system is characterized by unexpected and fluctuated demands and random times. Workers are multiskilled and must be assigned to...

In this paper, we address the capacitated product portfolio mix-and-allocation problem (CPPMA), which arises where a decision maker has to determine simultaneously (a) the optimal product mix; (b) its allocation to different production facilities; and (c) the capacities of the facilities given...

PurposeThis study aims to develop a heuristic for an outpatient appointment system considering patient classification.Design/methodology/approachThe heuristic proposed was applied in simulations with 18 scenarios, combining different environmental factors. Total cost was adopted as a performance...

Harmony search algorithm (HS) cannot always avoid being trapped in local optima, and several local search algorithms have recently been used to overcome this limitation by searching the neighborhood of some solution for improved ones. However, how local search affects the performance of HS has...

This work proposes a variation of the location-routing problem (LRP), a problem that interconnects two well-known N P-hard optimisation problems: the vehicle routing problem (VRP) and facility location problem (FLP). There are many mathematical formulations and solution methods for a number of...