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    Wyświetlanie 1-7 z 7
    Tytuł:
    Production cost calculation approach based on data collected during manufacturing process
    Autorzy:
    Krześniak, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/23944755.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    cost calculation
    cost modeling
    manufacturing costs
    control chart
    quality costs
    Statistical Process Control (SPC)
    kalkulacja kosztów
    modelowanie kosztów
    koszty produkcji
    wykres kontrolny
    koszty jakości
    statystyczna kontrola procesu
    Opis:
    The aim of the article is to present a proposal and discuss the production cost calculation procedures based on data collected during manufacturing process, according to standard SPC control chart evaluation. It is applied as a tool to support the process of continuous improvement of the manufacturing process and improve profitability by reducing the cost of production. Research methodology - the study uses the results of a literature review on the issue of cost analysis and their modeling. Key elements are the main cost components, but also those that are considered less important and may be overall decisive. Application of Statistical Process Control - as a method of data collection for cost modeling to improve overall cost structure is proposed. Originality/value - the considerations presented in the study may be the basis for determining the key components of the cost of production. The proposed simulation model allows for the determination of the main quality cost factors. This, in turn, should allow to define the main directions of searching for the optimization of the product cost in order to achieve the expected level of cost and quality.
    Źródło:
    System Safety : Human - Technical Facility - Environment; 2022, 4, 1; 19-27
    2657-5450
    Pojawia się w:
    System Safety : Human - Technical Facility - Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Indicator of Environmental Problems of Agricultural Sectors Under the Environmental Modeling
    Autorzy:
    Sutthichaimethee, P.
    Sawangdee, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/123997.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    agricultural sector
    revenue
    environment cost
    forward linkage
    multiplier
    modeling
    sustainable
    Opis:
    The objective of this research is to propose an indicator to deal with environmental problems for agricultural sectors caused by goods and services production. The aspects to calculate the real benefit of agricultural sectors and environmental cost for analyzing are natural resources materials, energy and transportation, fertilizer and pesticides, and sanitary and similar service. From the research it was found that the highest environmental cost of natural resources materials was 026: charcoal and fire-wood, while the lowest was 010 coconut. The highest environmental cost for energy and transportation was 024: agricultural services, while the highest environmental cost for fertilizer and pesticides was 011: palm oil. lastly, 017: other agricultural products was found as the highest environmental cost for sanitary and similar service. As a result, 010: coconut gained the highest real benefit, while 024: agricultural services presented as the lowest read benefit for the company. If Thailand using environmental problem indicator, especially with the agricultural sector, it can help to formulate efficient policies and strategies for the country in 3 development areas, which are social, economic, and environmental development.
    Źródło:
    Journal of Ecological Engineering; 2016, 17, 2; 12-18
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Price patterns in an oligopoly with switching cost and uncertain demand
    Autorzy:
    Zawisza, M.
    Kamiński, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/406324.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    price competition
    switching cost
    agent-based modeling
    uncertain demand
    price volatility
    Opis:
    Characteristics of price patterns have been investigated in an oligopoly market with costs for switching a provider. Two regimes of a company’s access to information have been considered. In the benchmark scenario, firms make decisions based on perfect information about demand. In the other – more realistic scenario – they conduct market research to estimate an unknown demand curve and therefore face uncertainty regarding their profit function, which in turn leads to suboptimal decision making. The authors inspected how a company’s access to information on demand, costs for switching a provider and the rate of market renewal influence price patterns on the market. It has been shown that positive switching cost is a sufficient condition for price dispersion, as well as imperfect information about the company's profit function, e.g. from market research. The average price under the perfect information regime is lower than under market research based price setting, a higher switching cost makes it easier for companies to coordinate their prices and a higher rate of market renewal softens the influence of the switching cost on market price.
    Źródło:
    Operations Research and Decisions; 2013, 23, 3; 71-89
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carrying Capacity Model of Food Manufacturing Sectors for Sustainable Development From Using Environmental and Natural Resources of Thailand
    Autorzy:
    Sutthichaimethee, P.
    Tanoamchard, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/123855.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    food manufacturing
    environment cost
    indicator
    carrying capacity
    revenue
    sanitary and similar services
    modeling
    Opis:
    The objective of this research is to propose an indicator to assess and rank environmental problems caused by production within the food manufacturing sector of Thailand. The factors used to calculate the real benefit included the costs of natural resources, energy and transportation, fertilizer and pesticides, and sanitary and similar service. The highest environmental cost in terms of both natural resources materials and energy and transportation was ice, while the highest environmental cost for fertilizer and pesticides was coconut and palm oil. Confectionery had the highest environmental cost for sanitary and similar services. Overall, real estate gained the highest real benefit, while repair not classified elsewhere had the lowest real benefit for the company. If Thailand uses an indicator of environmental harm, especially within the food manufacturing sector, it could help to formulate efficient policies and strategies for the country in three areas of development, which are social, economic, and environmental development.
    Źródło:
    Journal of Ecological Engineering; 2015, 16, 5; 1-8
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizing electricity costs during integrated scheduling of jobs and stochastic preventive maintenanceunder time-of-use electricity tariffs
    Autorzy:
    Sadiqi, Assia
    El Abbassi, Ikram
    El Barkany, Abdellah
    Darcherif, Moumen
    El Biyaali, Ahmed
    Powiązania:
    https://bibliotekanauki.pl/articles/407321.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    scheduling
    production
    maintenance
    electricity cost
    time
    electricity tariff
    stochastic
    flexible
    MILP
    optimization
    modeling
    CPLEX
    MATLAB
    Opis:
    Time-of-use (TOU) electricity pricing has been applied in many countries around the world to encourage manufacturers to reduce their electricity consumption from peak periods to off-peak periods. This paper investigates a new model of Optimizing Electricity costs during Integrated Scheduling of Jobs and Stochastic Preventive Maintenance under time of-use (TOU) electricity pricing scheme in unrelated parallel machine, in which the electricity price varies throughout a day. The problem lies in assigning a group of jobs, the flexible intervals of preventive maintenance to a set of unrelated parallel machines and then scheduling of jobs and flexible preventive maintenance on each separate machine so as to minimize the total electricity cost. We build an improved continuous-time mixed-integer linear programming (MILP) model for the problem. To the best of our knowledge, no papers considering both production scheduling and Stochastic Preventive Maintenance under time of-use (TOU) electricity pricing scheme with minimization total Electricity costs in unrelated parallel machine. To evaluate the performance of this model, computational experiments are presented, and numerical results are given using the software CPLEX and MATLAB with then discussed.
    Źródło:
    Management and Production Engineering Review; 2019, 10, 4; 123-132
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of the capillary pressure-saturation pore-size distribution parameter on geological carbon sequestration estimates
    Autorzy:
    Cheng, Ch.-L.
    Perfect, E.
    Yu, T. E.
    Gragg, M. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/91981.pdf
    Data publikacji:
    2017
    Wydawca:
    Główny Instytut Górnictwa
    Tematy:
    geological carbon sequestration
    numerical modeling
    capillary pressure
    saturation
    cost estimate
    geologiczna sekwestracja węgla
    modelowanie numeryczne
    ciśnienie kapilarne
    nasycenie
    szacowanie kosztów
    Opis:
    Cost estimates for geologic carbon sequestration (GCS) are vital for policy and decision makers evaluating carbon capture and storage strategies. Numerical models are often used in feasibility studies for the different stages of carbon injection and redistribution. Knowledge of the capillary pressure-saturation function for a selected storage rock unit is essential in applications used for simulating multiphase fluid flow and transport. However, the parameters describing these functions (e.g. the van Genuchten m pore size distribution parameter) are often not measured or neglected compared to other physical properties such as porosity and intrinsic permeability. In addition, the use of average instead of point estimates of m for numerical simulations of flow and transport can result in significant errors, especially in the case of coarse-grained sediments and fractured rocks. Such erroneous predictions can pose great risks and challenges to decision-making. We present a comparison of numerical simulation results based on average and point estimates of the van Genuchten m parameter for different porous media. Forward numerical simulations using the STOMP code were employed to illustrate the magnitudes of the differences in carbon sequestration predictions resulting from the use of height-averaged instead of point parameters. The model predictions were converted into cost estimates and the results indicate that varying m values in GCS modeling can cause cost differences of up to hundreds of millions dollars.
    Źródło:
    Journal of Sustainable Mining; 2017, 16, 3; 67-72
    2300-1364
    2300-3960
    Pojawia się w:
    Journal of Sustainable Mining
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comprehensive modelling of the cost effectivness of railway line electrification
    Modelowanie progu efektywności ekonomicznej elektryfikacji linii kolejowej
    Autorzy:
    Tomczyk, M.
    Pacholczyk, M.
    Karwowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/266408.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
    Tematy:
    railway traction
    economical threshold
    life cycle cost (LCC)
    modeling train dynamics
    trakcja kolejowa
    próg efektywności ekonomicznej
    koszt cyklu trwałości
    LCC
    modelowanie dynamiki ruchu pojazdu
    Opis:
    Subject of this paper is the mathematical model estimating the Economical threshold between usage of combustion engine traction and electrical traction for new and modernized railway passenger communication lines. Currently available models do not coincide with the whole complexity of the problem. The proposed model was implemented into Matlab and then validated on “Pomorska Kolej Metropolitalna” investment time-frame and its cost of infrastructure, type of Diesel Multiple Units (DMU) and track geometry. The vehicles maintenance levels are taken into consideration as well. Usage of the Energy Storage Systems is considered. The final result of this analysis is threshold of economic efficiency in analyzed period of 30 years for traffic flow expressed in value of passenger per hour in rush hours.
    W artykule zaproponowano model matematyczny służący do estymowania wartości progu efektywności ekonomicznej pomiędzy użyciem trakcji spalinowej a trakcji elektrycznej na modernizowanych lub nowo budowanych pasażerskich liniach kolejowych. Obecnie używane modele nie uwzględniają całej złożoności problemu. Przedstawione rozwiązanie zostało zaimplementowane w środowisku Matlab, a następnie zweryfikowane w odniesieniu do inwestycji w budowę pt. “Pomorska Kolej Metropolitalna”. W modelu uwzględniono czas realizacji i istnienia projektu, koszty proponowanej infrastruktury, rodzaj pojazdów spalinowych i elektrycznych oraz kształt i topografię linii kolejowej. Koszty związane z utrzymaniem pojazdów (analiza LCC) oraz możliwe zastosowanie superkondensatorowych zasobników energii w pojeździe lub w podstacjach trakcyjnych są również uwzględnione w modelu. Końcowym wynikiem przeprowadzonej analizy jest estymacja progu efektywności dla założonego czasu istnienia inwestycji wyrażona w potokach pasażerów w godzinach szczytu.
    Źródło:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2016, 51; 197-200
    1425-5766
    2353-1290
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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