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1
Content available Modeling safety of port and maritime transportation systems
Magryta-Mut Beata
Zeszyty Naukowe Akademii Morskiej w Szczecinie
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2023
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nr 74 (146)
65--74
EN
This study aims to improve an earlier safety analysis of port and maritime transportation systems in two cases. The first case does not consider outside impacts and the second case operates under the assumption that they are impacted by their operation processes. New and original suggestions on separate and joint system safety and operation cost optimization are also described and future research is also outlined. Probabilistic modeling methods are used as the research methods. The proposed research procedures enable the determination of the safety function and risk function for the port oil terminal critical infrastructure and the maritime ferry technical system in both examined cases, based on the strictly exact statistical data about their operation processes and on the improved approximate evaluations of their components safety parameters through expert opinion methods that originate directly from the users of these systems. Other proposed practically significant safety and resilience indicators are the mean lifetime up to the exceeding of a critical safety state, the moment when the risk function value exceeds the acceptable safety level, the intensity of ageing/degradation in both cases, the coefficient of operation process impact on system safety, and the coefficient of system resilience to operation process impact in the second case. As a result of this research, it is originally found that the proposed cost optimization procedures and the finding of the corresponding system safety indicators deliver an important possibility for the system total operation cost minimizing and keep fixed the corresponding conditional safety indicators during the operation. It was also established that the proposed system safety optimization procedures, and corresponding system operation total costs, deliver an important possibility for the system safety indicators maximization and keep fixed the corresponding system operation total costs during the operation.
2
Content available Port oil terminal operation cost optimization
Magryta-Mut Beata
Safety and Reliability of Systems and Processes
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2023
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Summer Safety and Reliability Seminar 2023
131--146
EN
The operation model of a complex system changing its functional structure and its instantaneous operation costs during the variable at time operation states and linear programming are proposed to optimize the system operation process in order to get the system total operation cost minimal. The optimization method allowing to find the optimal values of the transient probabilities of the complex system operation process at the particular operation state that minimize the system total operation cost mean value under the assumption that the system conditional operation costs mean values at the particular operation states are fixed or in the safety state subset not worse than the critical safety state are presented. The procedure of finding the optimal mean value of system total operation cost for the fixed operation time or in the safety state subset not worse than the critical safety state are applied to the port oil terminal operation cost minimization.
3
Content available Port oil terminal operation cost and system safety joint optimization
Magryta-Mut Beata
Safety and Reliability of Systems and Processes
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2022
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Summer Safety and Reliability Seminar 2022
143--162
EN
The model of system operation total costs in the safety state subsets is introduced and the procedure of its operation total cost in the safety state subset not worse than the critical safety state minimization is presented. The model of system safety impacted by operation process is created and the procedure of its safety in the safety state subset not worse than the critical safety state maximization is presented as well. To analyze jointly the system safety and its operation cost optimization, we propose the procedure of determining the optimal values of limit transient probabilities of the system operation process at the particular operation states that allows to find the best system safety function and other safety indicators, through applying the created system safety model and linear programming. Next, to find the system operation total costs in the safety state subsets, corresponding to this system best safety indicators, we replace the limit transient probabilities at the particular operation states, existing in the formula for the system operation total costs in the safety state subsets, by their optimal values existing in the formulae for the coordinates of the system safety function after maximization. On the other hand, to analyze jointly the system operation cost and its safety optimization, we propose the procedure of determining the optimal values of limit transient probabilities of the system operation process at the particular operation states that allows to find minimal system operation total cost in the safety state subset not worse than the critical safety state, using the created system operation cost model and linear programming. After that, to find the system conditional safety indicators, corresponding to this system minimal total operation cost in the safety state subset not worse than the critical safety state, we replace the limit transient probabilities at particular operation states, existing in the formula for the system safety function coordinates, and for remaining system conditional safety indicators by their optimal values existing in the formulae for the system minimal total cost in the safety state subset not worse than the critical safety state. The created models are applied separately and jointly to the port oil terminal. Moreover, to fulfil the obtained port oil terminal optimal safety and operation cost results the modifications of its operation process are proposed. The evaluation of results achieved is performed and the perspective for future research in the field of the complex systems, including port oil terminal, safety and their operation costs joint analysis and optimization is given.
4
Content available Maritime transportation system safety and operation cost joint optimization
Kołowrocki Krzysztof, Magryta-Mut Beata
Safety and Reliability of Systems and Processes
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2022
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Summer Safety and Reliability Seminar 2022
93--116
EN
The model of system safety impacted by operation process is created and the procedure of its safety in the safety state subsets not worse than the critical safety state maximization is proposed. The model of system operation total costs in the safety state subsets is introduced and the procedure of its operation total cost in the safety state subset not worse than the critical safety state minimization is presented. To analyze jointly the system safety and its operation cost optimization, we propose determining the optimal values of limit transient probabilities of the system operation process at the particular operation states that allows to find the best system safety function and other safety indicators, utilizing the created system safety model and linear programming. Next, to find the system operation total costs in the safety state subsets, corresponding to this system best safety indicators, we replace the limit transient probabilities at the particular operation states, existing in the formula for the system operation total costs in the safety state subsets, by their optimal values existing in the formulae for the coordinates of the system safety function after maximization. On the other hand, to analyze jointly the system operation cost and it’s safety optimization, we propose the procedure of determining the optimal values of limit transient probabilities of the system operation process at the particular operation states that allows to find minimal system operation total cost in the safety state subset not worse than the critical safety state, using the created system operation cost model and linear programming. After that, to find the system conditional safety indicators, corresponding to this system minimal total operation cost in the safety state subset not worse than the critical safety state, we replace the limit transient probabilities at particular operation states, existing in the formula for the system safety function coordinates, and for remaining system conditional safety indicators by their optimal values existing in the formulae for the system minimal total cost in the safety state subsets not worse than the critical safety state. The created models are applied separately and jointly to the maritime transportation system. Moreover, to fulfil the obtained maritime transportation system optimal safety and operation cost results the modifications of its operation process is proposed. The evaluation of results is performed and future research in the field of the complex systems, including maritime transportation systems, safety and their operation costs joint analysis and optimization is proposed.
5
Content available Safety and operation cost optimization of port oil terminal critical infrastructure
Kołowrocki Krzysztof, Magryta-Mut Beata
Safety and Reliability of Systems and Processes
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2021
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Summer Safety and Reliability Seminar 2021
227--247
EN
The model of system safety impacted by operation process is introduced and the procedure of its safety maximization is proposed. The model of system operation total cost during the fixed operation time is introduced and the procedure of its minimization is presented. To analyse jointly the system safety and its operation cost optimization, we propose the procedure of determining the optimal values of limit transient probabilities of the system operation process at the particular operation states that allows to find maximal system safety indicators, through applying the created system safety model and linear programing. Next, to find the system conditional operation total cost during the fixed operation time, corresponding to this system maximal safety indicators, we replace the limit transient probabilities at the particular operation states, existing in the formula for the system operation total cost during the fixed operation time, by their optimal values existing in the formulae for the coordinates of the system safety function after maximization. The created models are applied to the port oil terminal critical infrastructure to maximize its safety indicators and to minimize its operation total cost during the fixed time separately. After that the port oil terminal critical infrastructure operation total cost during the fixed operation time corresponding to its maximal safety indicators is found. The evaluation of results achieved is performed and the perspective for future research in the field of the complex systems including critical infrastructures safety and their operation costs joint analysis and optimization is given.
6
Content available Preliminary general approach to modelling COVID-19 pandemic sufferer safety impacted by human living conditions
Kołowrocki Krzysztof, Bogalecka Magdalena, Dąbrowska Ewa, Torbicki Mateusz, Magryta-Mut Beata, Cichocka Oliwia
Safety and Reliability of Systems and Processes
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2021
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Summer Safety and Reliability Seminar 2021
181--206
EN
The safety and resilience indicators are proposed as crucial tools for analysis, identification, prediction and optimization of COVID-19 pandemic human safety and for minimization and mitigation of pandemic consequences.
7
Content available Operation cost and safety optimization of maritime transportation system
Kołowrocki Krzysztof, Magryta-Mut Beata
Safety and Reliability of Systems and Processes
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2021
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Summer Safety and Reliability Seminar 2021
207--225
EN
The model of system operation total cost during the fixed operation time is introduced and the procedure of its minimization is presented. The model of system safety impacted by operation process is introduced and the procedure of its safety maximization is proposed. To analyse jointly the system operation cost and safety optimization, we propose the procedure of determining the optimal values of limit transient probabilities of the system operation process at the particular operation states that allows to find the minimal operation total cost during the fixed operation time, through applying the created system general operation cost model in the fixed operation time and linear programming. Next, to find the system conditional safety indicators, corresponding to this system minimal total operation cost during the fixed operation time, we replace the limit transient probabilities in particular operation states, existing in the formula for the system safety function coordinates, by their optimal values existing in the formula for the system minimal total cost during the fixed operation time. Further, applying this formula for the system conditional safety function coordinates, related to the system minimal operation total cost during the fixed operation time, we find the remaining system conditional safety indicators. The created models are applied to the maritime ferry technical system to minimize the mean value of the system operation total cost during the fixed operation time of one month and to maximize its safety indicators. After that, the ferry technical system safety indicators corresponding to its minimal mean value of operation total cost are found. The evaluation of results achieved is performed and the perspective for future research in the field of the complex systems including critical infrastructures operation costs and safety joint analysis and optimization is given.
8
Content available Safety optimization of maritime ferry technical system
Magryta-Mut Beata
Safety and Reliability of Systems and Processes
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2020
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Summer Safety and Reliability Seminar 2020
175--182
EN
The method that can be used in critical infrastructure safety optimization is shown and adapted to the ferry technical system. The optimal values of the operation process, safety and resilience indicators are determined for the maritime ferry technical system. Practical suggestions on reorganizing the operation process of this member of a shipping critical infrastructure to maximize its lifetime in the safety states not worse than the critical safety state are proposed.
9
Content available Safety of maritime ferry technical system impacted by its operation process
Kołowrocki Krzysztof, Magryta-Mut Beata
Safety and Reliability of Systems and Processes
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2020
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Summer Safety and Reliability Seminar 2020
117--133
EN
The chapter focuses on safety examination of a technical system of a maritime ferry that is the component of a shipping critical infrastructure. The model of the critical infrastructure safety without considering outside impacts is applied to determination of the maritime ferry technical system safety indicators. The operation impact model on critical infrastructure safety is created and applied to safety and resilience analysis of this system. The safety and resilience indicators are determined for this system under the assumption that its components’ safety functions are piecewise exponential. The comparison of the maritime ferry technical system safety indicators without considering outside impacts with indicators considering its operation impact is done.
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