Scheduling Problems
Mostrando 1-12 de 87 artigos, teses e dissertações.
-
1. ANALYSIS OF MIXED INTEGER PROGRAMMING FORMULATIONS FOR SINGLE MACHINE SCHEDULING PROBLEMS WITH SEQUENCE DEPENDENT SETUP TIMES AND RELEASE DATES
ABSTRACT The scheduling of jobs over a single machine with sequence dependent setups is a classical problem setting that appears in many practical applications in production planning and logistics. In this work, we analyze six mixed-integer formulation paradigms for this classical context considering release dates and two objective functions: the total weigh
Pesqui. Oper.. Publicado em: 09/05/2019
-
2. Spatial Forest Planning for Optimized Harvest Scheduling
ABSTRACT The aim of this study was to develop a mathematical model for the spatial forest planning of harvest activity scheduling. Thirty-eight (38) blocks were formed from stands aged 13 to 17 years considering a total area limit set to 350 hectares. The model was built in Excel ® spreadsheet and solved by CPLEX® optimization software using the Branch an
Floresta Ambient.. Publicado em: 07/02/2019
-
3. A novel transition identification mechanism for the diesel blending and distribution scheduling problem using the discrete time representation with two time-scales granularity
ABSTRACT Transitions between tasks arise in many different scheduling problems. Sometimes transitions are undesired because they incur costs; sometimes they are undesired because they require setup time, and sometimes both. In one way or the other, frequently, transitions need to be identified and penalized in order for their frequency to be minimized. The p
Braz. J. Chem. Eng.. Publicado em: 2017-10
-
4. DAILY SCHEDULING OF SMALL HYDRO POWER PLANTS DISPATCH WITH MODIFIED PARTICLES SWARM OPTIMIZATION
This paper presents a new approach for short-term hydro power scheduling of reservoirs using an algorithm-based Particle Swarm Optimization (PSO). PSO is a population-based algorithm designed to find good solutions to optimization problems, its characteristics have encouraged its adoption to tackle a variety of problems in different fields. In this paper the
Pesqui. Oper.. Publicado em: 2015-04
-
5. JOINT OPTIMIZATION OF PRODUCTION PLANNING AND VEHICLE ROUTING PROBLEMS: A REVIEW OF EXISTING STRATEGIES
Keen competition and increasingly demanding customers have forced companies to use their resources more efficiently and to integrate production and transportation planning. In the last few years more and more researchers have also focused on this challenging problem by trying to determine the complexity of the individual problems and then developing fast and
Pesqui. Oper.. Publicado em: 2014-08
-
6. A review of three decades of research on some combinatorial optimization problems
This paper presents an overview of our research in combinatorial optimization problems. Over the last three decades, our team has been studying mostly optimization problems that arise in industrial environments through the elaboration and solution of mathematical decision models. In addition to elaborating innovative models, we have improved upon existing so
Pesqui. Oper.. Publicado em: 2013-04
-
7. Proposta de um modelo em programação linear para a solução de problemas de sistemas produtivos job shop com setup dependentes da sequência / Proposal of a linear programming model for solving problem systems job shop production with setup times sequence-dependent
Sequencing problems are very common, they happen every time there is a choice regarding the order in which several tasks can be performed. The business can be an airline, a hotel, a computer manufacturer or a university; these issues are part of their routine. The application of the sequencing techniques allows, for example, reducing the costs and fastening
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2012
-
8. Refinery production planning and scheduling: the refining core business
Intelligent production planning and scheduling are of paramount importance to ensure refinery profitability, logistic reliability and safety at the local and corporate levels. In Brazil, such activities play a particularly critical role, since the Brazilian downstream model is moving towards a demand-driven model rather than a supply-driven one. Moreover, ne
Brazilian Journal of Chemical Engineering. Publicado em: 2012-06
-
9. Metaheurísticas para o problema de Flowshop flexível com penalidades de adiantamento e atraso / Metaheuristics for the flexible Flowshop problem with earliness and tardiness penalties
This work deals with the problem of job scheduling in flexible flowshop system with the objective of minimizing the penalties for tardiness and earliness in terms of the job due date. It is considered that all jobs are available for processing in different moments, according to them release times, besides that, there are setup times depending on the sequence
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2011
-
10. Identificação de variáveis que impactam o sucesso de projetos nas empresas brasileiras. / Identification of variables that impact the projects success in Brazilian companies.
In present days, many organizations have been conducing projects even to solve technical problems or even to deliver changes and focus their efforts towards better and new businesses. Time, cost and quality targets, known as \"iron triangle\", have been traditionally used as projects\ success measures. During the last three decades, many studies trying to un
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/07/2011
-
11. Análise e proposta de melhoria do processo de previsão de demanda em uma pequena empresa do setor de cosméticos
Nowadays, even small-sized enterprises are investing in integrated management systems, called ERP (Enterprise Resource Planning), as a way to solve planning problems and to better control their cash flow. However, these enterprises end up neglecting one of the main inputs to improve the PPC (Production Planning and Control): the demand forecast. Thus, planni
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/07/2011
-
12. Uma aplicação de scheduling na indústria / The application of scheduling in the industry
This paper addresses the problem of sequencing jobs in the practical environment in the industry, which is considered more relevant aspects such as production in parallel, setup time, batch production and delivery date. Will also be considered some aspects of transport as the transport capacity, making the problem of atypical already studied in literature. T
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/05/2011