Papers by Keyword: Planning

Abstract: The forecast for electrical energy demands in the South Sulawesi area in 2060 is 198,353 GWh, so the electricity generation capacity required under the Business As Usual scenario is 38.68 GW in that year. If this demand is connected to the scenario of limiting the construction and operation of coal-fired power plants, then the capacity required is 41.02 GW. This article provides an overview of the value of electrical energy demand and generating capacity in South Sulawesi where the method used to plan additional electricity generating capacity is based on the OSeMOSYS model. The generating capacity of the analysis results comes from various types of power plants, namely: conventional types (combine cycle power plant, gas turbine power plant, gas engine power plant, coal-fired power plant, and diesel power plant), and Renewable Energy types (hydropower plant, mini hydro power plant, biomass power plant, waste-to-energy power plant, geothermal power plant, wind turbine power plant, and photovoltaic power plant). The primary energy used by these power plants comes from the South Sulawesi area and from outside South Sulawesi. Specifically, renewable energy is the potential of the South Sulawesi region.

Abstract: As urban populations burgeon and available surface space becomes scarce, the concept of underground cities gains traction as a viable technological solution. The movement of people, purchases, and recreational trips using vehicles has also become more intensive and requires new concepts to operate in a safe environment, especially in modern underground cities. However, a major challenge faced in subterranean environments is the limited access to natural daylight. This research explores the pivotal role of engineering technology in enhancing the quality of natural daylight within underground urban spaces. Through an interdisciplinary approach, the study investigates advanced lighting utilizing, architectural design strategies with sustainable transportation, and innovative materials to mitigate the inherent constraints of subterranean living. The research assesses the effectiveness of technological interventions to provide comfortable living and safe, sustainable transportation. It therefore addresses the design of light wells, utilize of smart materials, and the incorporation of cutting-edge lighting systems to optimize the distribution of natural light. Additionally, the study evaluates the psychological and physiological impacts of enhanced daylight exposure on residents, emphasizing the importance of human-centric design in subterranean environments. Key findings highlight the significance of daylight simulations in the planning phase, emphasizing the need for architects and urban planners to utilize state-of-the-art engineering utilizing to predict sunlight patterns to achieve great benefit in providing conceptual solutions to provide a suitable environment for vehicle operation. The research also emphasizes the importance of incorporating modern technology systems as atriums, light wells, and reflective surfaces to maximize natural light penetration. Furthermore, the research investigates the energy implications of relying on artificial lighting in conjunction with natural daylight. It explores sustainable energy conceptualized technological solutions, such as solar technology and vehicle transportation according to implementation considerations, to minimize the environmental impact of energy consumption in modern underground cities.

Abstract: Many companies are facing a constant need to develop coordination between operational functions to quickly respond to customer requests. Thus, many practitioners are resorting to an established and integrated business management methodology, the Sales and Operations Planning (S&OP). The impact of the S&OP on operational performance was significantly demonstrated in many studies. However, it turns out that the theoretical studies made differ from what is actually applied, in addition to several parameters that are considered in the calculations especially with regard to Japanese industries. So, how is S&OP operated in this industry? What are the different calculation parameters used? and how are the results obtained and analyzed?In this paper, we will first present a short literature review of S&OP and its role and benefits. Then, we present a model of S&OP used in a wire harnesses Japanese industry. The goal is to show first a concrete example, where we present the various parameters considered in the calculations, and then we will explain how the resulting graphs are analyzed by managers and what could be done as corrective actions in case of gap existing.

Abstract: In general, planning and scheduling of production are treated separately under the hierarchical strategy. Then, over the time, the iterative strategy appeared which partially considers the scheduling constraints during planning, except that the latter remains unsatisfactory because there is no guarantee that these constraints are taken into account. For this, is born the integrated strategy which integrates planning and scheduling and aims to solve the problem and define a feasible production plan. Since capacity constraints don’t reflect reality in terms of resource availability, and they are not always considered, capacity becomes aggregated. To remedy this problem, it is necessary to integrate more precise constraints of scheduling at the planning level. Based on this observation, we propose in this article a new model that integrates planning and scheduling and considers the constraint of resource availability. In our model, the objective function optimizes the total cost of production for a mono-level job-shop problem. To solve this N-P difficult problem we use a stochastic approached method as genetic algorithm (GA).

Abstract: The modern state of the raw material base of the “Kogalymneftegaz” TMC is characterized by deterioration in the structure and quality of the field reservoirs at the latter development stage. The depletion of the main developed oil formations has long exceeded 60%. Despite the high depletion rate, the complete coverage of all recoverable resources by flooding has not been achieved. The differences in zone and area irregularities of the production facilities and the imperfection of the existing development systems at the present stage lead to the formation of non-drainable resources. In order to involve them into production in formations, various types of interventions are carried out in order to improve the existing development systems. The research objective is to develop a detailed approach to planning a transfer of wells which have completed their purpose from one development facility to another. Using a detailed geological and routine analysis of results of carrying out various interventions on the formation, an active application of the most effective of these has been proposed.

Abstract: This article discusses a method for solving the problem of finding collisions of workspaces during construction. The solution of this problem is reduced to the solution of the basic problem of finding collisions (intersections) of geometric objects. Methods of classification, generation and analysis of workspace model are discussed. BIM technology is useful for creating 3D workspaces. Autodesk Revit was selected as a BIM software for creating digital building models and tools for creating workspaces. The scheme of interaction between BIM model and construction schedule is proposed to determine parameters of 3D workspace.

Abstract: This article concerns the integration of planning and scheduling production system. Planning and scheduling are usually treated separately because of their complexity. Scheduling largely depends on the production quantities computed at the production planning level. However, ignoring scheduling constraints in the tactical level leads to inconsistent decisions. So, it is important to integrate planning and scheduling to efficiently manage operations and to determine a realistic production plan for a given sequence of jobs on each machine. In this paper, we present some approaches proposed to solve the problem and we realize a comparison between the two most interesting ones, using the standard solver CPLEX.

Abstract: Manufacturing companies have to implement engineering changes in manufacturing systems to remain competitive in changing conditions. Physical influences like collisions or load capacities have to be considered for a proper planning of these changes by modeling and simulating the influences. To consider these physical influences, a concept is presented for the integration of physical model into realization of engineering changes. The concept provides information for the feasibility of the work steps for the execution and enables an efficient planning. Hence, planning mistakes can be detected before changes are executed and the negative impact on ongoing manufacturing can be avoided.

Abstract: The transportation policies focusing on minimizing the environmental impact aim at an improved quality of life and health of the population, the urban one in particular. Noise pollution is one of the biggest problems associated with the European urban environment at the present moment, mainly because of the ever-increasing road traffic. SUNET system (System for Urban Noise and Eco-Traffic) was designed to improve the management of the noise pollution in Cluj-Napoca and to provide up-to-date public data on a user-friendly interface. The implementation of the application over the entire municipality is highly advantageous as it creates a link between the town’s administration (the local authorities, the City Hall of Cluj-Napoca) and the user (the citizens) through this system which is dynamic, modern and compliant with the European regulations. The graphic interface uses the HTML (HyperText Markup Language) code, while the database is set up in an SQL (Structured Query Language) format and contains information about the characteristics of the system and users alike, all organized in specific tables. The need for an online urban noise pollution monitoring system, such as the SUNET one, appears to allow the provision of fairly realistic and up-to-date information and encourage the community to actively assist in the application of proper action plans and the decision-making process when it comes to the population’s exposure to high levels of noise pollution.

Abstract: This study presents random load forecasts for the Nigerian 330 kV 38-bus transmission grid using a complex trend analysis technique. By considering randomness of monthly load peaks and normal distribution function, yearly load mean and confidence intervals were predicted for the transmission buses from an obtained 10-year historical load population. Also using the proposed algorithm of the mentioned technique, long-term random load forecasts for the transmission system were obtained. The obtained forecasts were compared with results from an earlier prediction model created for the same grid, which comprises a Monte Carlo technique that considers the location’s predominant control variables as population and GDP growth; the maximum obtainable error was 24%. The obtained results of forecasts and comparison are applicable for determining effective transmission system planning policy in Nigeria for the forecast period.