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    Application of three metaheuristic algorithms to time-cost-quality trade-off project scheduling problem for construction projects considering time value of money
    (MDPI, 2021-12-01)
    Time, cost, and quality have been known as the project iron triangles and substantial factors in construction projects. Several studies have been conducted on time-cost-quality trade-off problems so far, however, none of them has considered the time value of money. In this paper, a multi-objective mathematical programming model is developed for time-cost-quality trade-off scheduling problems in construction projects considering the time value of money, since the time value of money, which is decreased during a long period of time, is a very important matter. Three objective functions of time, cost, and quality are taken into consideration. The cost objective function includes holding cost and negative cash flows. In this model, the net present value (NPV) of negative cash flow is calculated considering the costs of non-renewable (consumable) and renewable resources in each time period of executing activities, which can be mentioned as the other contribution of this study. Then, three metaheuristic algorithms including multi-objective grey wolf optimizer (MOGWO), non-dominated sorting genetic algorithm (NSGA-II), and multi-objective particle swarm optimization (MOPSO) are applied, and their performance is evaluated using six metrics introduced in the literature. Finally, a bridge construction project is considered as a real case study. The findings show that considering the time value of money can prevent cost overrun in projects. Additionally, the results indicate that the MOGWO algorithm outperforms the NSGA-II and MOPSO algorithms.
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    Economic-Financial Evaluation of a Cement Company: Cementos Pacasmayo
    (Universidad de Concepcion, 2023-01-16)
    The aim of this paper is to address a company valuation procedure by explaining the steps that must be followed from an economic-financial perspective. Design/methodology: We employ the study case methodology to fulfill all the procedure stages. Specifically, we analyze the Peruvian cement company “Cementos Pacasmayo”. A 10-year discounted cash flow (DCF) is presented and brought to present value using a discount rate (WACC) composed by the cost of debt and the cost of capital of the company. Findings: We can conclude that the evaluation process should always include the country, industry and company. Practical implications: Our study provides useful implications for management. On the one hand, it is important to highlight the subjectivity to predict some parameters or doing assumptions. On the other hand, it is important to understand and know a good procedure to valuate a company as an insider or a potential investor. Originality/value: The proposed model consists of the economic studies of the country, sector and company, which allow the appraiser to specify certain parameters or assumptions for the elaboration of a model that approximates the value of the company.