Abstract The Banbury mixing process (BMP) is to supplies the specific characteristic compounds for the tire manufacturing process. Idle time in the BMP was a problem caused by the aging process between mixing steps and the limited space for processing, measured in pallets. In this study, the resource-constrained project scheduling model (RCPS) is modified in case of the objective function and the input value of resource constraint to minimize idle time (SST). The complete minimization (Cmax) is changed from minimizing the starting time of the last job to the starting time of all jobs. In addition, the non-limited resource is defined as the input for the space capacity to reduce the idle time. As the results, the SST can provide the schedule that make less 5 time periods of idle time. Moreover, when considering the relationship between mixing and aging, aging process that is scheduled from SST starts immediately comparison to Cmax that some of aging process are not. Furthermore, the effect of the quantity of pallets was also examined. Although the non-limited resource does not make any delay to the schedule but the limited quantity is not. When pallets are limited, aging jobs were significantly impacted, with the last aging pallet being delayed. To reduce delays, it prepares an adequate supply of pallets that is close to or equal to its requirement that is defined by the non-limited resource. Further research combining the scheduling of the BMP with the tire manufacturing process and more techniques to modify RCPS are applied.
{"title":"Modified Resource-Constrained Project Scheduling to Minimize Idle Time for Banbury Mixing Process: A Case Study in the Tire Manufacturing Industry","authors":"A. Butrat, S. Supsomboon","doi":"10.2478/mspe-2023-0029","DOIUrl":"https://doi.org/10.2478/mspe-2023-0029","url":null,"abstract":"Abstract The Banbury mixing process (BMP) is to supplies the specific characteristic compounds for the tire manufacturing process. Idle time in the BMP was a problem caused by the aging process between mixing steps and the limited space for processing, measured in pallets. In this study, the resource-constrained project scheduling model (RCPS) is modified in case of the objective function and the input value of resource constraint to minimize idle time (SST). The complete minimization (Cmax) is changed from minimizing the starting time of the last job to the starting time of all jobs. In addition, the non-limited resource is defined as the input for the space capacity to reduce the idle time. As the results, the SST can provide the schedule that make less 5 time periods of idle time. Moreover, when considering the relationship between mixing and aging, aging process that is scheduled from SST starts immediately comparison to Cmax that some of aging process are not. Furthermore, the effect of the quantity of pallets was also examined. Although the non-limited resource does not make any delay to the schedule but the limited quantity is not. When pallets are limited, aging jobs were significantly impacted, with the last aging pallet being delayed. To reduce delays, it prepares an adequate supply of pallets that is close to or equal to its requirement that is defined by the non-limited resource. Further research combining the scheduling of the BMP with the tire manufacturing process and more techniques to modify RCPS are applied.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"263 - 270"},"PeriodicalIF":1.5,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44994935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The objective of this paper is to propose effective methods to implement sustainable development principles among young people, both in schools and universities. The authors of this article recognize the significant potential among young individuals whose actions and choices have a substantial impact on the environment. By analyzing the knowledge and behaviors of young people towards sustainable development and environmental protection, based on surveys conducted among pupils and students from the south-eastern region of Poland, this paper identifies gaps that require improvement and proposes actions aimed at raising pro-ecological awareness among the youth. The analysis revealed that only 25% of the respondents have heard about the “Agenda for Sustainable Development – 2030”, 20% were familiar with the goals of sustainable development, and few have participated in initiatives for sustainable development. However, 58% of respondents claimed to engage in activities for environmental protection in their daily lives. The article also presents the degree of compliance with the assumptions of the 2030 Agenda for Sustainable Development on both global and local scales. Furthermore, the paper analyzes two aspects of students’ awareness of sustainable development: their knowledge of goals and documents, and their pro-ecological behavior in daily life. Based on the findings, this paper proposes ways to introduce sustainable development principles in selected areas of school and university functioning to enhance ecological awareness and shape pro-ecological attitudes among young people. Concrete actions to facilitate implementation are also suggested.
{"title":"Analysis of the Survey Results on the Pro-Ecological Awareness of Young People in the Aspect of Sustainable Development","authors":"A. Czajkowska, M. Ingaldi","doi":"10.2478/mspe-2023-0035","DOIUrl":"https://doi.org/10.2478/mspe-2023-0035","url":null,"abstract":"Abstract The objective of this paper is to propose effective methods to implement sustainable development principles among young people, both in schools and universities. The authors of this article recognize the significant potential among young individuals whose actions and choices have a substantial impact on the environment. By analyzing the knowledge and behaviors of young people towards sustainable development and environmental protection, based on surveys conducted among pupils and students from the south-eastern region of Poland, this paper identifies gaps that require improvement and proposes actions aimed at raising pro-ecological awareness among the youth. The analysis revealed that only 25% of the respondents have heard about the “Agenda for Sustainable Development – 2030”, 20% were familiar with the goals of sustainable development, and few have participated in initiatives for sustainable development. However, 58% of respondents claimed to engage in activities for environmental protection in their daily lives. The article also presents the degree of compliance with the assumptions of the 2030 Agenda for Sustainable Development on both global and local scales. Furthermore, the paper analyzes two aspects of students’ awareness of sustainable development: their knowledge of goals and documents, and their pro-ecological behavior in daily life. Based on the findings, this paper proposes ways to introduce sustainable development principles in selected areas of school and university functioning to enhance ecological awareness and shape pro-ecological attitudes among young people. Concrete actions to facilitate implementation are also suggested.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"312 - 321"},"PeriodicalIF":1.5,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41431219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The relevance of the decision of this scientific research is related to the requirements of Industry 4.0. orientated to environmental sustainability. This article summarizes the scientific discussion on the issue of the comparison of environmental costs in various divisions such as Slovakia, Italy, Brazil, Mexico, China. The main goal of this article is to compare costs in divisions of the parent company with different geographical working. The object of the research was the parent company EMBRACO. Methods of research were focused on using economic analysis with indicators of the cost function, chain index, and cost structure. The results of the research show environmental costs of the divisions are at the level of €1.9-€3.1 million. The total state of the environmental costs by individual country represents the lowest value in Italy and Slovakia. The lowest environmental costs are for the category of air costs for all divisions and the second category of costs with low values are other environmental costs, while Brazil and Mexico do not record this category of costs in the accounting. The key category for minimizing environmental costs is water costs for Slovakia and China and other waste costs for Italy, Brazil, and Mexico. The hazardous waste category represents (0.9-32%). Based on these results, the parent company can decide on the possibilities of positioning its divisions in terms of strategic business.
{"title":"Comparison of Environmental Costs in Divisions with Different Geographical Action and their Significance in Environmental Management","authors":"K. Teplická, S. Hurná","doi":"10.2478/mspe-2023-0027","DOIUrl":"https://doi.org/10.2478/mspe-2023-0027","url":null,"abstract":"Abstract The relevance of the decision of this scientific research is related to the requirements of Industry 4.0. orientated to environmental sustainability. This article summarizes the scientific discussion on the issue of the comparison of environmental costs in various divisions such as Slovakia, Italy, Brazil, Mexico, China. The main goal of this article is to compare costs in divisions of the parent company with different geographical working. The object of the research was the parent company EMBRACO. Methods of research were focused on using economic analysis with indicators of the cost function, chain index, and cost structure. The results of the research show environmental costs of the divisions are at the level of €1.9-€3.1 million. The total state of the environmental costs by individual country represents the lowest value in Italy and Slovakia. The lowest environmental costs are for the category of air costs for all divisions and the second category of costs with low values are other environmental costs, while Brazil and Mexico do not record this category of costs in the accounting. The key category for minimizing environmental costs is water costs for Slovakia and China and other waste costs for Italy, Brazil, and Mexico. The hazardous waste category represents (0.9-32%). Based on these results, the parent company can decide on the possibilities of positioning its divisions in terms of strategic business.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"248 - 253"},"PeriodicalIF":1.5,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48716844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The foundation of the social communication system of the Polish police is the press officers of district and city departments, who maintain regular contact with journalists of local and regional media, and incidentally also with national or international mass media. The aim of the 2022 survey was to determine the media relations activities, techniques and tools used by officers. All press officers in the police garrison in the Silesian Voivodeship participated in the research project. 100% of press officers took part in the survey. Responding to the expectations of journalists police officers prefer direct contact with journalists, including 52% by phone. Although press officers consider social media to be a good method of contacting the public (30%), they do not use it themselves in contacts with journalists. They prefer to use the official police website (28%). Police spokesmen, due to the information they have, gain the attention of the mass media and do not have to use modern communication techniques to attract journalists. Maintaining constant contact with journalists, press officers also assessed the level of their professionalism. According to the respondents, TV journalists are characterized by the highest professionalism (41%). In second place are press and radio journalists with a similar number of indications (27% and 24%). The professionalism of Internet editorial staff was rated the worst (8%).
{"title":"Managing Social Communication. Analysis of Media Relations Activities of Polish Police Press Officers","authors":"Dariusz Krawczyk","doi":"10.2478/mspe-2023-0032","DOIUrl":"https://doi.org/10.2478/mspe-2023-0032","url":null,"abstract":"Abstract The foundation of the social communication system of the Polish police is the press officers of district and city departments, who maintain regular contact with journalists of local and regional media, and incidentally also with national or international mass media. The aim of the 2022 survey was to determine the media relations activities, techniques and tools used by officers. All press officers in the police garrison in the Silesian Voivodeship participated in the research project. 100% of press officers took part in the survey. Responding to the expectations of journalists police officers prefer direct contact with journalists, including 52% by phone. Although press officers consider social media to be a good method of contacting the public (30%), they do not use it themselves in contacts with journalists. They prefer to use the official police website (28%). Police spokesmen, due to the information they have, gain the attention of the mass media and do not have to use modern communication techniques to attract journalists. Maintaining constant contact with journalists, press officers also assessed the level of their professionalism. According to the respondents, TV journalists are characterized by the highest professionalism (41%). In second place are press and radio journalists with a similar number of indications (27% and 24%). The professionalism of Internet editorial staff was rated the worst (8%).","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"290 - 300"},"PeriodicalIF":1.5,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42688536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Kuzior, V. Babenko, І. Rekunenko, Borys Pohodenko
Abstract The research dedicated to risk management issues in the energy sector addresses current problems associated with risk management that arise in the energy sector. The aim of the study was to identify factors that affect risks, analyze scientific risk management methods, and consider innovative approaches to risk management in the energy sector. The study used a critical analysis of the literature on the subject as well as an analysis of risk management standards and methods. The innovation of the research lies in its consideration of modern trends in risk management in the energy sector, taking into account changing economic and political conditions, technical possibilities, as well as social attitudes and demands. The study showed that the most effective approach to risk management in the energy sector is the use of an integrated risk management system that takes into account all aspects of enterprise activity. The results of the study can be useful for energy companies that deal with risk management. They can be used to improve risk management strategies and reduce the possibility of negative consequences. In addition, this research can be used for educational purposes for students and professors who study risk management and the energy sector. The next steps of the research may include expanding the scope of the study to other areas and developing more detailed risk management models.
{"title":"The Current State of Scientific Research of the Process of Risk Management of Ukrainian Energy Sector Enterprises","authors":"A. Kuzior, V. Babenko, І. Rekunenko, Borys Pohodenko","doi":"10.2478/mspe-2023-0036","DOIUrl":"https://doi.org/10.2478/mspe-2023-0036","url":null,"abstract":"Abstract The research dedicated to risk management issues in the energy sector addresses current problems associated with risk management that arise in the energy sector. The aim of the study was to identify factors that affect risks, analyze scientific risk management methods, and consider innovative approaches to risk management in the energy sector. The study used a critical analysis of the literature on the subject as well as an analysis of risk management standards and methods. The innovation of the research lies in its consideration of modern trends in risk management in the energy sector, taking into account changing economic and political conditions, technical possibilities, as well as social attitudes and demands. The study showed that the most effective approach to risk management in the energy sector is the use of an integrated risk management system that takes into account all aspects of enterprise activity. The results of the study can be useful for energy companies that deal with risk management. They can be used to improve risk management strategies and reduce the possibility of negative consequences. In addition, this research can be used for educational purposes for students and professors who study risk management and the energy sector. The next steps of the research may include expanding the scope of the study to other areas and developing more detailed risk management models.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"322 - 331"},"PeriodicalIF":1.5,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46405743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract One of the basic stages of mining operations is development work. During them there can occur the events that affect the process of development work as well as the safety of workers. This article conducts a process risk assessment using the Failure Modes and Effects Analysis (FMEA) method to identify events that disrupt the development work process, along with the causes of the occurrence of these events. The study covered the process of development work i.e. the execution of the M-2 roadway in seam 502/1 realized at a depth of about 550 m with an assumed length of about 500 m. As a result of the study, those risks for which countermeasures should be applied were identified, and measures were proposed to minimize the risks involved. As part of the research, an FMEA evaluation form was created to assess process risks in the execution of similar work. The highest process risk was identified for the drivage of the excavation with a road header, and is related to the possibility of frequent failure of hydraulic systems. Similar process risk results were obtained for the risk associated with improper execution of mining with explosives and the need to perform additional blasting work in the excavated roadway. The results can contribute to reducing the time of coal face stoppage during development work, and thus improve the process of them and reduce the costs incurred during this process.
{"title":"Use of the Method FMEA for Hazard Identification and Risk Assessment in a Coal Mine","authors":"A. Duda, Tymoteusz Juzek","doi":"10.2478/mspe-2023-0037","DOIUrl":"https://doi.org/10.2478/mspe-2023-0037","url":null,"abstract":"Abstract One of the basic stages of mining operations is development work. During them there can occur the events that affect the process of development work as well as the safety of workers. This article conducts a process risk assessment using the Failure Modes and Effects Analysis (FMEA) method to identify events that disrupt the development work process, along with the causes of the occurrence of these events. The study covered the process of development work i.e. the execution of the M-2 roadway in seam 502/1 realized at a depth of about 550 m with an assumed length of about 500 m. As a result of the study, those risks for which countermeasures should be applied were identified, and measures were proposed to minimize the risks involved. As part of the research, an FMEA evaluation form was created to assess process risks in the execution of similar work. The highest process risk was identified for the drivage of the excavation with a road header, and is related to the possibility of frequent failure of hydraulic systems. Similar process risk results were obtained for the risk associated with improper execution of mining with explosives and the need to perform additional blasting work in the excavated roadway. The results can contribute to reducing the time of coal face stoppage during development work, and thus improve the process of them and reduce the costs incurred during this process.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"332 - 342"},"PeriodicalIF":1.5,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48911175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The article describes an attempt to assess the electrostatic properties of mechanical friction-induced sparking. Such sparks are the cause of numerous accidents in hard coal mines. The article summarizes accidents in hard coal mining in Poland in recent years. In most cases, the initials were mechanical sparks. Mechanical sparks contain energy, a part of which is related to their excess electrostatic charge, whereas the other part is of a different origin (kinetic or thermal energy, for example). The article tries to estimate how much of this energy is energy impact generated by electrostatics impact. It is hard to measure the dynamic electrostatic parameters like electric charge. Authors select four measuring methods. This test methods are prepared based on authors knowledge of electrostatic parameters and European standards dedicated to measure the electrostatics parameters. These circuits were prepared for four different spark parameters. Measurement methods of electrostatic field of sparks stream are not able to measure field potential of sparks. The measuring instruments do not have such a fast response time, adequate to the speed of the sparks. Spark generation and parameter measurement experiments were performed. The only method to determine the amount of electrostatic charge on sparks is to measure the entire charge by collecting sparks at the measuring electrode. The measuring system requires that the entire stream of sparks falls on the electrode. Tested transferred electrostatic charge of stream of sparks is about 10 nC. It means that this charge can be an effective ignition source for some explosive atmospheres. Electrostatic charge with Certain methods were rejected as inadequate following result analysis. A claim for one of the methods was submitted to the Patent Office of the Republic of Poland.
{"title":"Mechanical Spark Electrostatic Property Testing Method","authors":"P. Kędzierski","doi":"10.2478/mspe-2023-0023","DOIUrl":"https://doi.org/10.2478/mspe-2023-0023","url":null,"abstract":"Abstract The article describes an attempt to assess the electrostatic properties of mechanical friction-induced sparking. Such sparks are the cause of numerous accidents in hard coal mines. The article summarizes accidents in hard coal mining in Poland in recent years. In most cases, the initials were mechanical sparks. Mechanical sparks contain energy, a part of which is related to their excess electrostatic charge, whereas the other part is of a different origin (kinetic or thermal energy, for example). The article tries to estimate how much of this energy is energy impact generated by electrostatics impact. It is hard to measure the dynamic electrostatic parameters like electric charge. Authors select four measuring methods. This test methods are prepared based on authors knowledge of electrostatic parameters and European standards dedicated to measure the electrostatics parameters. These circuits were prepared for four different spark parameters. Measurement methods of electrostatic field of sparks stream are not able to measure field potential of sparks. The measuring instruments do not have such a fast response time, adequate to the speed of the sparks. Spark generation and parameter measurement experiments were performed. The only method to determine the amount of electrostatic charge on sparks is to measure the entire charge by collecting sparks at the measuring electrode. The measuring system requires that the entire stream of sparks falls on the electrode. Tested transferred electrostatic charge of stream of sparks is about 10 nC. It means that this charge can be an effective ignition source for some explosive atmospheres. Electrostatic charge with Certain methods were rejected as inadequate following result analysis. A claim for one of the methods was submitted to the Patent Office of the Republic of Poland.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"216 - 222"},"PeriodicalIF":1.5,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42672694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Rosak-Szyrocka, Almuhannad Allahham, Justyna Żywiołek, Jamshid Ali Turi, Anupam Das
Abstract The primary goals of the study are to present a qualitative examination of household awareness of renewable energy sources and to ascertain their requirements, as well as their expectations for an improvement in quality of life as a consequence of using renewable energy to reduce greenhouse gas emissions and air pollution while improving public health. There are no empirical studies examining the level of household awareness of renewable energy in EU countries, so this gap is also considered a further area of empirical research. Seven European nations were selected for the study: the Czech Republic, Slovenia, France, Portugal, Spain, Austria, and Germany. The survey was conducted from April 2021 to June 2022 with over 17030 respondents. Additionally, it was given a statistical analysis by using the C-Pearson coefficient. Results of our study showed that households’ awareness is low and they also expect that they will not pay more for tourist services that use renewable energy sources. Moreover, results showed that when renewable energy sources are used, in households’ opinions, levels of CO2 will decrease and that this will have a favorable effect on the environment, but they still think that this will have a detrimental influence on their health.
{"title":"Expectations for Renewable Energy, and Its Impacts on Quality of Life in European Union Countries","authors":"J. Rosak-Szyrocka, Almuhannad Allahham, Justyna Żywiołek, Jamshid Ali Turi, Anupam Das","doi":"10.2478/mspe-2023-0015","DOIUrl":"https://doi.org/10.2478/mspe-2023-0015","url":null,"abstract":"Abstract The primary goals of the study are to present a qualitative examination of household awareness of renewable energy sources and to ascertain their requirements, as well as their expectations for an improvement in quality of life as a consequence of using renewable energy to reduce greenhouse gas emissions and air pollution while improving public health. There are no empirical studies examining the level of household awareness of renewable energy in EU countries, so this gap is also considered a further area of empirical research. Seven European nations were selected for the study: the Czech Republic, Slovenia, France, Portugal, Spain, Austria, and Germany. The survey was conducted from April 2021 to June 2022 with over 17030 respondents. Additionally, it was given a statistical analysis by using the C-Pearson coefficient. Results of our study showed that households’ awareness is low and they also expect that they will not pay more for tourist services that use renewable energy sources. Moreover, results showed that when renewable energy sources are used, in households’ opinions, levels of CO2 will decrease and that this will have a favorable effect on the environment, but they still think that this will have a detrimental influence on their health.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"128 - 137"},"PeriodicalIF":1.5,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44590595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The paper presents the results of forecasts made for the volume of steel production in Poland based on actual data for the period from 2006 to 2021 with forecasting until 2026. The actual data used for the forecasts included annual steel production volumes in Poland (crude steel) in millions of tons. Basic adaptive methods were used to forecast the volume of steel production for the next five years. When selecting the methods, the course of the trend of the studied phenomenon was taken into account. In order to estimate the level of admissibility of the adopted forecasting methods, as well as to select the best forecasts, the errors of apparent forecasts (ex post) were calculated. Errors were calculated in the work: RMSE Root Mean Square Error being the square root of the mean square error of the ex-post forecasts yt for the period 2006-2021; ? as the mean value of the relative error of expired forecasts y*t (2006-2021) – this error informs about the part of the absolute error per unit of the real value of the variable yt. Optimization of the forecast values was based on the search for the minimum value of one of the above-mentioned errors, treated as an optimization criterion. In addition, the value of the point forecast (for 2022) obtained on the basis of the models used was compared with the steel production volume obtained for 3 quarters of 2022 in Poland with the forecast for the last quarter. Forecasting results obtained on the basis of the forecasting methods used, taking into account the permissible forecast errors, were considered as the basis for determining steel production scenarios for Poland until 2026. To determine the scenarios, forecast aggregation was used, and so the central forecasts were determined separately for decreasing trends and for increasing trends, based on the average values of the forecasts obtained for the period 2022-2026. The central forecasts were considered the baseline scenarios for steel production in Poland in 2022-2026 and the projected production volumes above the baseline forecasts with upward trends were considered an optimistic scenario, while the forecasted production volumes below the central scenario for downward trends were considered a pessimistic scenario for the Polish steel industry.
{"title":"Post-Pandemic Steel Production Scenarios for Poland Based on Forecasts of Annual Steel Production Volume","authors":"B. Gajdzik","doi":"10.2478/mspe-2023-0019","DOIUrl":"https://doi.org/10.2478/mspe-2023-0019","url":null,"abstract":"Abstract The paper presents the results of forecasts made for the volume of steel production in Poland based on actual data for the period from 2006 to 2021 with forecasting until 2026. The actual data used for the forecasts included annual steel production volumes in Poland (crude steel) in millions of tons. Basic adaptive methods were used to forecast the volume of steel production for the next five years. When selecting the methods, the course of the trend of the studied phenomenon was taken into account. In order to estimate the level of admissibility of the adopted forecasting methods, as well as to select the best forecasts, the errors of apparent forecasts (ex post) were calculated. Errors were calculated in the work: RMSE Root Mean Square Error being the square root of the mean square error of the ex-post forecasts yt for the period 2006-2021; ? as the mean value of the relative error of expired forecasts y*t (2006-2021) – this error informs about the part of the absolute error per unit of the real value of the variable yt. Optimization of the forecast values was based on the search for the minimum value of one of the above-mentioned errors, treated as an optimization criterion. In addition, the value of the point forecast (for 2022) obtained on the basis of the models used was compared with the steel production volume obtained for 3 quarters of 2022 in Poland with the forecast for the last quarter. Forecasting results obtained on the basis of the forecasting methods used, taking into account the permissible forecast errors, were considered as the basis for determining steel production scenarios for Poland until 2026. To determine the scenarios, forecast aggregation was used, and so the central forecasts were determined separately for decreasing trends and for increasing trends, based on the average values of the forecasts obtained for the period 2022-2026. The central forecasts were considered the baseline scenarios for steel production in Poland in 2022-2026 and the projected production volumes above the baseline forecasts with upward trends were considered an optimistic scenario, while the forecasted production volumes below the central scenario for downward trends were considered a pessimistic scenario for the Polish steel industry.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"172 - 190"},"PeriodicalIF":1.5,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41943895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zied Bahroun, Moayad Tanash, R. As'ad, Mohamad Alnajar
Abstract The availability of digital infrastructures and the fast-paced development of accompanying revolutionary technologies have triggered an unprecedented reliance on Artificial intelligence (AI) techniques both in theory and practice. Within the AI domain, Machine Learning (ML) techniques stand out as essential facilitator largely enabling machines to possess human-like cognitive and decision making capabilities. This paper provides a focused review of the literature addressing applications of emerging ML tools to solve various Project Scheduling Problems (PSPs). In particular, it employs bibliometric and network analysis tools along with a systematic literature review to analyze a pool of 104 papers published between 1985 and August 2021. The conducted analysis unveiled the top contributing authors, the most influential papers as well as the existing research tendencies and thematic research topics within this field of study. A noticeable growth in the number of relevant studies is seen recently with a steady increase as of the year 2018. Most of the studies adopted Artificial Neural Networks, Bayesian Network and Reinforcement Learning techniques to tackle PSPs under a stochastic environment, where these techniques are frequently hybridized with classical metaheuristics. The majority of works (57%) addressed basic Resource Constrained PSPs and only 15% are devoted to the project portfolio management problem. Furthermore, this study clearly indicates that the application of AI techniques to efficiently handle PSPs is still in its infancy stage bringing out the need for further research in this area. This work also identifies current research gaps and highlights a multitude of promising avenues for future research.
{"title":"Artificial Intelligence Applications in Project Scheduling: A Systematic Review, Bibliometric Analysis, and Prospects for Future Research","authors":"Zied Bahroun, Moayad Tanash, R. As'ad, Mohamad Alnajar","doi":"10.2478/mspe-2023-0017","DOIUrl":"https://doi.org/10.2478/mspe-2023-0017","url":null,"abstract":"Abstract The availability of digital infrastructures and the fast-paced development of accompanying revolutionary technologies have triggered an unprecedented reliance on Artificial intelligence (AI) techniques both in theory and practice. Within the AI domain, Machine Learning (ML) techniques stand out as essential facilitator largely enabling machines to possess human-like cognitive and decision making capabilities. This paper provides a focused review of the literature addressing applications of emerging ML tools to solve various Project Scheduling Problems (PSPs). In particular, it employs bibliometric and network analysis tools along with a systematic literature review to analyze a pool of 104 papers published between 1985 and August 2021. The conducted analysis unveiled the top contributing authors, the most influential papers as well as the existing research tendencies and thematic research topics within this field of study. A noticeable growth in the number of relevant studies is seen recently with a steady increase as of the year 2018. Most of the studies adopted Artificial Neural Networks, Bayesian Network and Reinforcement Learning techniques to tackle PSPs under a stochastic environment, where these techniques are frequently hybridized with classical metaheuristics. The majority of works (57%) addressed basic Resource Constrained PSPs and only 15% are devoted to the project portfolio management problem. Furthermore, this study clearly indicates that the application of AI techniques to efficiently handle PSPs is still in its infancy stage bringing out the need for further research in this area. This work also identifies current research gaps and highlights a multitude of promising avenues for future research.","PeriodicalId":44097,"journal":{"name":"Management Systems in Production Engineering","volume":"31 1","pages":"144 - 161"},"PeriodicalIF":1.5,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46789063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：