Um modelo multiobjetivo de otimização aplicado ao processo de orçamento de capital

Abensur, Eder Oliveira

doi:10.1590/s0104-530x2012000400007

Cited by 14 publications

(18 citation statements)

References 9 publications

(7 reference statements)

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“…In this type of problem, the budget constraint plays important role with respect to limit the decisions that can be taken in the selection of the investment projects, and it is recommended the use of optimization techniques aiming at the optimal allocation of available financial resources (Abensur, 2012).…”

Section: • Net Present Value Methods (Npv) -It Allowsmentioning

confidence: 99%

“…So, this study aimed to develop and apply a FGP model to solve the capital budget problem. In addition, it was performed a comparison of its results with those obtained by Abensur (2012), who proposed, recently, an alternative model to the same class of investment problems.…”

Section: • Net Present Value Methods (Npv) -It Allowsmentioning

confidence: 99%

“…This is the case of investment project selection problems, or capital budget problems, (Santos & Barros, 2011), according to Brigham et al (2001), there are many ways to select the best set of investment projects, and the traditional investment assessment methods are (Abensur, 2012): 149/159 Fuzzy Goal Programming applied……”

Section: Introductionmentioning

confidence: 99%

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Programação por Metas Fuzzy aplicada ao processo de orçamento de capital em um ambiente econômico sob incerteza

et al. 2017

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Resumo: A Programação por Metas (Goal Programming -GP) é uma abordagem multicritério da Pesquisa Palavras-chave: Programação por Metas Fuzzy; Orçamento de capital; Ambiente econômico sob incerteza.Abstract: The Goal Programming (GP) is a multi-criteria approach of Operational Research that has been used for solving complex decision problems. This paper proposes a new Fuzzy Goal Programming (FGP) model to handle the process of capital budget of companies in an economic environment under uncertainty. For performance comparison purposes, the FGP and another recently published model developed for the same purposes were applied to data from a company that was the object of the study. The modeling and optimization were made with the GAMS software -23.6.5 and using the CPLEX solver. The results obtained from the FGP model provided higher improvements than those obtained with the alternative model, as for example: increased profitability index, reduced payback and better application of the capital available in the budget. Furthermore, the FGP model has flexibility features that allow the manager to simulate, quickly and easily obtaining results about scenarios under uncertainty.

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Section: • Net Present Value Methods (Npv) -It Allowsmentioning

confidence: 99%

Section: • Net Present Value Methods (Npv) -It Allowsmentioning

confidence: 99%

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Programação por Metas Fuzzy aplicada ao processo de orçamento de capital em um ambiente econômico sob incerteza

et al. 2017

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“…Discounted cash flow methods are based on a series of future inflows brought to present value and discounted at an interest rate considered to be of minimal attractiveness (Abensur, 2012;Araújo et al, 2011;Celuppi et al, 2014;Cunha et al, 2014;Lima et al, 2013;Rodrigues et al, 2015). Net Present Value, Discounted Payback, Internal Rate of Return, and the Annual Equivalent Cost (AEC) are among the most popular discounted cash flow methods.…”

Section: Annual Equivalent Cost (Aec)mentioning

confidence: 99%

Optimization Model for Vehicle Routing and Equipment Replacement in Farm Machinery

Grano

Abensur

2017

Eng. Agríc.

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An equipment replacement decision takes into account economic engineering models based on discounted cash flow (DCF) such as the Annual Equivalent Cost (AEC). Despite a large number of researches on industrial assets replacement, there is a lack of studies applied to farm goods. This study aimed at assessing an alternative model for economic decision analysis on farm machinery replacement, with no restrictions on the number of replacements and assessed goods during a defined timeline. The results of the hybrid model based on the combination of the vehicle routing problem and the equipment replacement problem (RVPSE) applied to three different farm tractors showed the model reliability, providing a wider range of decisions for management support.

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“…Via NPV, the possibility of return overcoming by the investment is verified; therefore, the investment decision should be accepted if NPV is positive, and rejected, if it is negative (SILVA & FONTES, 2005;ABENSUR, 2012;PERES et al, 2009;SANTOS, 2009). The NPV calculation is performed according to Equation (4) …”

Section: Economic Evaluationmentioning

confidence: 99%

Solar energy use for water pre-heating in boilers of agro-industries

et al. 2014

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ABSTRACT:Energy consumption in the world has been growing every year. The industrial sector represents 27.32% of the world energy demand. Heating systems that use solar energy may contribute with a percentage of the total energy required by industries. This work aimed to study the use of vacuum solar collectors for water pre-heating in boilers. We used four collectors installed according to NBR 15,569; water flow through the tubes was 0.058 L/s, and temperature in the inlet and outlet pipes was measured. Results showed that instantaneous radiation, and inlet fluid and room temperatures are variables that influence the process, reaching water maximum temperature in the solar collector outlet of 97.9 °C, and efficiency of approximately 65% for most experiments. For the financial viability evaluation, the payback study was applied, which resulted in 4; 7 and 5 years, for the respective sources: firewood, LPG (liquefied petroleum gas), and electricity. Regarding the calculation of the annual contribution to the reduction of greenhouse gases, it was, respectively, 2.162 and 356 kg of CO 2 per m 2 of collector tubes, in comparison with firewood and LPG.KEYWORDS: solar collector, water heating, energy efficiency. USO DE ENERGIA SOLAR NO PRÉ-AQUECIMENTO DE ÁGUA EM CALDEIRAS PARA AGROINDÚSTRIASRESUMO: O consumo de energia no mundo vem crescendo a cada ano, e o setor industrial representa 27,32% da demanda de energia mundial. Sistemas de aquecimento que usam energia solar podem contribuir com uma percentagem da energia total requerida pelas indústrias. Este trabalho teve por objetivo estudar o uso de coletores solares a vácuo no pré-aquecimento de água para caldeiras de agroindústrias. Foram utilizados quatro coletores instalados de acordo com a NBR 15.569, uma vazão da água por meio dos tubos de 0,058L/s e foi medida a temperatura na entrada e na saída dos tubos. Os resultados obtidos mostraram que a radiação instantânea, temperatura de entrada do fluido e temperatura ambiente são variáveis que mais influenciam no processo, chegando a uma temperatura máxima para água, na saída do coletor solar, de 97,9°C, e eficiência de aproximadamente 65% para a maioria dos experimentos realizados. Na avaliação da viabilidade financeira, foi realizado o estudo de payback descontado, que resultou em 4; 7 e 5 anos, para os respectivos combustíveis: lenha, GLP (gás liquefeito de petróleo) e energia elétrica. Com relação ao cálculo da contribuição na redução anual de gases do efeito estufa, foi de, respectivamente, 2.162 e 356 kg de CO 2 por m 2 de tubos coletores, quando comparado com lenha e o GLP. PALAVRAS-CHAVE:coletor solar, aquecimento de água, eficiência energética.

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Um modelo multiobjetivo de otimização aplicado ao processo de orçamento de capital

Cited by 14 publications

References 9 publications

Programação por Metas Fuzzy aplicada ao processo de orçamento de capital em um ambiente econômico sob incerteza

Programação por Metas Fuzzy aplicada ao processo de orçamento de capital em um ambiente econômico sob incerteza

Optimization Model for Vehicle Routing and Equipment Replacement in Farm Machinery

Solar energy use for water pre-heating in boilers of agro-industries

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