Mechanism for Measuring System Complexity Applying Sensitivity Analysis

Gomes, Viviane M.; Paiva, João R. B.; Reis, Marcio R. C.; Wainer, Gabriel; Calixto, Wesley P.

doi:10.1155/2019/1303241

Cited by 10 publications

(14 citation statements)

References 44 publications

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“…For the sensitivity analysis of systems with this characteristic, one of the recommended methods is the analytical method proposed by Gomes et al [60]. However, the proposed methodology in Figure 7 is not limited to the use of this method; thus, other sensitivity analysis methods such as the area method, partial derivatives, factorial planning, conditional variance, and the total effects method [70][71][72][73] can be used.…”

Section: Discussionmentioning

confidence: 99%

Stability Metric Based on Sensitivity Analysis Applied to Electrical Repowering System

et al. 2021

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Stability metrics are used to quantify a system’s ability to maintain equilibrium under disturbances. We did not identify the proposition of a stability metric using sensitivity analysis within the literature. This work proposes a system stability metric and its application to an electrical repowering system. The methodology for applying the proposed metric comprises: (i) system parameters sensitivity analysis and spider diagram construction, (ii) determining the array containing the line segments inclination angles of each spider diagram curve, and (iii) stability calculation using the array mean and maximum inclination value of a line segment. After simulating the model built for the electrical repowering system and applying the methodology, we obtain results regarding the sensitivity indices and stability values of system inputs relative to their outputs, considering the original system and with reduced parameters. Using the stability study, it was possible to determine different stability categories for the system parameters, which indicates the need for different analysis levels.

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Section: Discussionmentioning

confidence: 99%

Stability Metric Based on Sensitivity Analysis Applied to Electrical Repowering System

et al. 2021

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“…The more sensitive the parameter, the greater its impact on the system output (the greater the difference between obtained output values concerning the output value corresponding to − → β scenario). Based on this statement, Gomes 56 proposes a method called the area method to obtain the sensitivity indices of input parameters. The spider diagram analysis interval is defined by the analyst, considering possible parameter restrictions.…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…Based on the system model, we carry out the pre-analysis, when we define: (i) base scenario or base case, (ii) parameters variation range, and (iii) analysis interval in the spider diagram. Using the area method, we can calculate the system parameters sensitivity indices, according to expression (2) 56 . The output variable can be defined as the system performance.…”

Section: Proposed Complexity Metricmentioning

confidence: 99%

Complexity Measure based on Sensitivity Analysis Applied to an Intensive Care Unit system

Paiva¹,

Gomes²,

Barbosa³

et al. 2021

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This work proposes a system complexity metric and its application to Intensive Care Unit (ICU) system. The methodology for applying said complexity metric comprises: (i) parameters sensitivity indices calculation, (ii) mapping connections dynamics between system components, and (iii) system’s complexity calculation. After simulating the ICU computer model and using the proposed methodology, we obtained results regarding: number of admissions, number of patients in queue, length of stay, beds in use, ICU performance, and system complexity values (in regular or overloaded operation). As the number of patients in queue increased, the ICU system complexity also increased, indicating a need for policies to promote system robustness.

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“…A quantitative assessment of the complexity of the struc ture of technical systems is one of the most difficult problems of systems engineering, which is the subject of a number of scien tific works of domestic and foreign scientists. In [7], it is noted that in recent years a number of methods have been proposed for analyzing the complexity of production, developed on the basis of different theories and approaches. The definition of the concept of complexity is given and a number of ideas about the types of complexity are given.…”

mentioning

confidence: 99%

“…In [8], a method based on the use of information entropy is used to measure the complexity of a production system configura tion. The article [7] proposes metrics of sensitivity and com plexity based on onetime values and system relationships. The relationship between performance and complexity provides the ability to create an optimized system configuration with tar geted properties.…”

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confidence: 99%

New aspects of the methodology for assessing the complexity of the structure of technological systems of the mining and metallurgical complex

Rud¹,

Bilonozhko²

2021

Nauk. visn. nat. hirn. univ.

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Purpose. To develop a new approach to evaluating the complexity of the structure of technological systems of mining and metallurgical complex with the proposed integrated index. The practical application of this indicator is due to the methodological difficulties arising when determining the hierarchical level of the elements of the systems studied. Methodology. A systematic approach is applied that allow us to explore industrial complexes of equipment as systems objects and present them in the form of technological systems. Methods of analysis and synthesis are used that allow us to identify common elements in the known methods for estimating the complexity of systems and to develop a new methodological approach to the process of decomposition systems. Methods of simulation of technological systems are applied, which allow submitting them in the form of models structural-element schemes. Findings. A new methodological approach is proposed to quantify the complexity of the structure of technological systems of mining and metallurgical complex, in which the process of decomposition of the system is performed by the method of successive cut-off of element connections with the system. Using the proposed decomposition method provides high accuracy and reliability when comparing technological systems with the structure of different hierarchical levels and consisting of a different number of subsystems and elements. Approbation of the developed method on the example of the pelletising plant pellets No. 2 of Pivnichnyi Mining and Processing Plant (Kryvyi Rih). It is shown that in the real technological systems the complexity of the structure occurs mainly due to the series connection of extra equipment rather than creating new relations. To increase the index of relative complexity of the technological system management structure, it is reasonable to use a combined series-parallel connection of additional technological equipment, which ensures the highest hierarchical level of the elements in the system. Originality. The originality of the new approach to assessing the complexity of structure of the technological systems of mining and metallurgical complex is to develop a method of decomposition of the system, the essence of which consists in the successive cutting off of the connection of the elements with the system. Practical value. The practical value of methodological approach the developed by the authors to estimate the complexity of the structure of the technological systems of the mining and metallurgical complex is that in contrast to the known method, the quantitative evaluation of system structure complexity is performed without performing the operation of the formal description of the structure. It provides high accuracy and reliability of the result, reduces the complexity of the evaluation process.

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Mechanism for Measuring System Complexity Applying Sensitivity Analysis

Cited by 10 publications

References 44 publications

Stability Metric Based on Sensitivity Analysis Applied to Electrical Repowering System

Stability Metric Based on Sensitivity Analysis Applied to Electrical Repowering System

Complexity Measure based on Sensitivity Analysis Applied to an Intensive Care Unit system

New aspects of the methodology for assessing the complexity of the structure of technological systems of the mining and metallurgical complex

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