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Modelling and evaluation of "Fixed Horizon", "Rolling Horizon" and "Real Time Management" production scheduling paradigms in ubiquitous production networks under conditions of dynamic environments for economic and environmental sustainability

Modelação e avaliação dos paradigmas de “Fixed Horizon”, “Rolling Horizon” e “Real Time Management” do escalonamento da produção em redes de produção ubíquas nas condições de ambientes dinâmicos para a sustentabilidade económica e ambiental
Authors: Alves, Cátia Filipa Veiga;

Modelling and evaluation of "Fixed Horizon", "Rolling Horizon" and "Real Time Management" production scheduling paradigms in ubiquitous production networks under conditions of dynamic environments for economic and environmental sustainability

Abstract

The real time management paradigm implies real-time decision making and enable dynamic reconfiguration of enterprises. In some areas it is possible to find a number of real time management applications, while in manufacturing systems the real time management is still in initial research state. Also, there is a lack of research of scheduling problems considering larger size manufacturing systems. This project aims to validate the following hypotheses: (1) real time management paradigm is more suitable for production scheduling in ubiquitous production networks under conditions of dynamic environments than the fixed horizon and rolling horizon paradigms, and (2) Real time management paradigm contributes to economic and environmental sustainability. The validation was based on simulation, through secondary data collection, which was the base for conduction of all simulations for the validation process. It were investigated four scenarios for validation. The first case represented the case with secondary data (from literature), considering 8 jobs and 8 machines. The second case represented the case with data secondary data with variations, considering 150 jobs and 8 machines. The third case represented the case with data secondary data with variations, considering 180 jobs and 64 machines. The forth case represented the hybrid case of 8 jobs and 64 machines and 8 jobs and 200 machines. A kind of greedy algorithm was considered for the resources (machines) selection, i.e. for each resource selection the choice of the best resource is made at that time, not looking for forward solutions. The validation was carried out by two instruments for hypotheses validation, the original environment model and the original simulator developed. The results obtained for the described scenarios validates the hypotheses that the real time management scheduling paradigm is more suitable when compared with other production scheduling paradigms, and that the real time management contributes to the economic and environmental sustainability. This research contributed to the phenomenology of real time management in ubiquitous and cloud manufacturing systems under conditions of dynamic environments. Further, future work is considered to create new research projects under this topic.

O paradigma de gestão em tempo real implica a tomada de decisão em tempo real e permite a reconfiguração dinâmica das empresas. Em algumas áreas é possível encontrar um número de aplicações da gestão em tempo real, enquanto nos sistemas de produção a gestão em tempo real ainda se encontra numa fase inicial de investigação. Existe ainda um falta de investigação nos problemas de escalonamento considerando sistemas de produção de tamanhos grandes. Este projeto tem como objetivo a validação das seguintes hipóteses: (1) o paradigma de gestão em tempo real é mais adequado para sistemas de produção em redes de produção ubíquas em condições de ambientes dinâmicos do que os paradigmas de horizonte fixo e horizonte rolante, e (2) o paradigma de gestão em tempo real contribui para a sustentabilidade económica e ambiental. A validação foi baseada em simulação, através da recolha de dados secundários, que serviram de base para condução de todas as simulações para o processo de validação. Para a validação foram investigados quatro senários: o caso com dados secundários (da literatura), considerando 8 jobs e 8 máquinas, o caso com dados secundários com variações, considerando 150 jobs e 64 máquinas, o caso com dados secundários com variações, considerando 180 jobs e 64 máquinas, e um caso hibrido considerando 8 jobs e 64 máquinas e 8 jobs e 200 máquinas. Um tipo de algoritmo guloso foi considerado para a seleção de recursos (máquinas), isto é, para cada seleção de recursos, a escola do melhor recurso é feita nesse momento, não olhando para soluções futuras. A validação foi realizada através de dois instrumentos para a validação de hipóteses, um modelo de ambiente original e um simulador original desenvolvido. Os resultados obtidos para os senários descritos validam as hipóteses de que o paradigma de gestão em tempo real é mais adequado quando comparado com outros paradigmas de escalonamento de produção, e que a gestão em tempo real contribui para a sustentabilidade económica e ambiental. Esta investigação contribuiu para a fenomenologia da gestão em tempo real em sistemas de produção ubíquos e cloud em condições de ambientes dinâmicos. Além disso, foi considerado trabalhos futuros para a criação de novos projetos de investigação sobre este tema.

The PhD project had financial support from the FCT – Fundação para a Ciência e a Tecnologia – under the Doctoral grant number SFRH/BD/85672/2012.

Doctoral Degree in Industrial and Systems Engineering

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Portugal
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Keywords

Fixed horizon, Environment dynamics, Horizonte rolante, Produção em rede, Produção em rede e ubíqua, Horizonte fixo, Networked production, Escalonamento da Produção, Sustainability, Real time management, Gestão em tempo real, Rolling horizon, Sustentabilidade, Production Scheduling, Dinâmica do ambiente, Ubiquitous and Cloud Manufacturing

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citations
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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