Navegando por Assunto "Opportunity cost"

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Acesso aberto (Open Access)
Custo de oportunidade (trade-off) para diferentes estratégias de manutenção de trilhos ferroviários na Amazônia
(Universidade Federal do Pará, 2022-12-22) CURCINO, Gabrielle dos Anjos; BRAGA, Eduardo de Magalhães; http://lattes.cnpq.br/4783553888547500
The emergency maintenance of railway assets in the Brazilian Amazon has generated revenue losses and opportunity costs. The general objective of this study was to identify the importance of opportunity cost in decision-making for corrective and preventive maintenance strategies. The methodology proposed the modeling of the variables referring to the economic and operational data of railway maintenance in the last ten years, by non-parametric Gradient Boosting Regression Tree machine learning, and hybridizing it with the analysis of the opportunity cost for the trade-off decision making of an ore railroad in the Brazilian Amazon. The results showed that the GBDT was efficient in fitting the training data with r2 equal to one. Similarly, the test data presented satisfactory r2 values, close to one, where the degree of importance of the independent variables in the prediction of the dependent variables was obtained. Pearson's method was used to construct the correlation matrix for each pair of variables. From the generated model, eight forecast groups were created for the year 2022. Then, conflict levels were established, suggested by the economic literature, between the forecast scenarios, where the opportunity cost was identified among the alternatives with the best benefit to maintenance strategies. In this way, the opportunity cost combined with machine learning serves as an instrument to help companies in the search for better maintenance decisions, which contributes to the improvement of rail asset management.
Acesso aberto (Open Access)
O custo de oportunidade do atraso de empreendimentos imobiliários na ótica do empreendedor: estudo de caso em uma construtora de Belém
(Universidade Federal do Pará, 2016-09-14) TOMÁS, Luciana Mendonça; DUARTE, André Augusto Azevedo Montenegro; http://lattes.cnpq.br/1135221873341973
In a real estate project, even if numerous considerations are made to achieve financial, operational, and consequently success, there are many factors that alter planning and that mainly impact the completion of the project, causing measurable losses, such as failure to comply with Budget, and others difficult to measure, such as the breakdown of the company's prestige in the market. The objective of this work is to measure the cost of the delay of the works to the one who undertakes, based on what economic science characterizes and denominates the opportunity cost, which, applied in this work, will have as a metric the sum of five components/costs: 1) maintenance of the construction site; 2) maintenance of head office; 3) readjustment of the value of the supplys; 4) delayed receipt of funds related to the value of property financing amount; and 5) the detrimental of the company's image, some of which are not measured or even perceived by the entrepreneur, who could avoid them or minimize them if their works are delivered within the scheduled deadlines. Data were collected from thirty (30) works of a large construction company in the city of Belém-PA, which identified a modal delay of almost 22 months. The opportunity cost of the delay in the present study reached a total value of R$ 20,732,963.98, or a basic unit cost of opportunity of R$ 44.68/m² of real global area, that is, the delay, In this case study, corresponds to almost 5% of the cost of construction, proving to be an important and significant component, and should be considered when feasibility studies of real estate projects and management/management of works.
Acesso aberto (Open Access)
Custo de oportunidade pelo atraso de uma obra: estudo de caso na UFPA
(Universidade Federal do Pará, 2019-05-23) ESTUMANO, Keyla da Costa; NEVES, Renato Martins das; http://lattes.cnpq.br/6538317425557058; DUARTE, André Augusto Azevedo Montenegro; http://lattes.cnpq.br/1135221873341973
Delays in public construction projects execution lead to serious problemas because these projects are planned to provide services to the community and financed by resources from taxpayers, thus, the public project managers must always seek to meet the stipulated execution and construction deadlines. This study objective is to measure the consequences of public constructions delay through the opportunity cost. As a case study it was adopted a Public University construction project aiming at the expansion of a Health Care Center for children with autism sprectrum disorder. The methodology presented applied characteristics with exploratory objectives, using qualitative and quantitative approache. This research aimed to characterize the time delay of the construction project, as well as the services that couldn't be provided, both for the number of attendances that were not performed and for graduate and undergraduate students who coundn't increase their qualification because they coundn't have experience of participating in such project. Through the study, among other things, it was possible to envisage that if autistic children needed to be treated in a private clinic to have similar care they would have to provide approximately R$ 236.50 per session. Another relevant factor is that with the completion of the construction project there would be a 34% increase in the number of services performed from the year 2014 to the year 2018. The result has shown that non-compliance with the deadline of a public construction project is much more damaging than a mere delay in time of the construction and should be avoided or minimized to the maximum extent.