We address the Unequal-Area Facility-Layout Problem (UA-FLP), which aims to dimension and locate rectangular facilities in an unlimited floor space, without overlap, while minimizing the sum of distances among facilities weighted by “material-handling” flows. We introduce two algorithmic approaches to address this problem: a basic Genetic Algorithm (GA), and a GA combined with a decomposition s...

A tree structure model has been proposed for representing the unequal-area facility layout. Each facility has a different rectangular shape specified by its area and aspect ratio. In this layout problem, based on the assumption that the shop floor has enough space for laying out the facilities, no constraint is considered for a shop floor. Objectives are minimizing total part movement between f...

Inspired by a case study, this paper reports a successful application of VNS to the production planning and scheduling problem that arises in the glass container industry. This is a multi-facility production system, where each facility has a set of furnaces where the glass paste is produced in order to meet the demand, being afterwards distributed to a set of parallel molding machines. Since th...

A common situation in experimental science involves comparing a number of treatment groups each with single reference (control group). For example, we might compare diameters fungal colonies subject to range inhibitory agents those from control group which no agent was applied. In this situation, the most commonly applied test is Dunnett's test, compares separately while controlling experiment-...

In this thesis, we address the tactical planning decision problem of ingot sizing in an aluminum sheet manufacturing facility. Ingots used for sheet manufacturing are made-to-stock, and used when necessary, to satisfy customer demands. The facility produces large ingots to exploit economies of scale in ingot casting, but customers order products frequently, and in small quantities. In this situ...

We present a novel hybrid method, swarm intelligence based sample average approximation (SIBSAA), for solving the capacitated reliable facility location problem (CRFLP). The CRFLP extends the wellknown capacitated fixed-cost facility problem by accounting for the unreliability of facilities. The standard SAA procedure, while effectively used in many applications, can lead to poor solution quali...

This work aims at presenting a nanoparticle generation non-transportable facility in aerosol phase called “CAIMAN” (acronym for Characterization of Instruments Measuring Aerosols of Nanoparticles) and its performances. This facility delivers primary nanoaerosols from electrodes made of C, Al, Cu (and mixtures containing Be), Ag, Constantane (a mixture of Cu-55wt% and Ni-45wt%) particles at know...

In wireless sensor networks, clustering is an effective technique to extend the network lifetime. However, in the multi-hop clustering model, if the nodes are uniformly distributed and the clusters are of equal size, the cluster heads closer to the sink have to relay much heavier traffic, leading to the ‘‘energy hole’’ problem. Unequal clustering structures have been proposed to mitigate the ‘‘...

This study examines the robust facility layout problem (RFLP) while taking into account unpredictable health and environmental safety standards. problem's major goal is to arrange departments in various of a hall, allot each department appropriate amount space, identify kind amenities equipment needed for chosen sector. To accomplish aforementioned objective, five criteria were taken account: t...