On the definition of functional reliability

Restel, Franciszek J.

doi:10.1201/b15938-452

Cited by 11 publications

(3 citation statements)

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“…At present, a lot of studies deal with the possibility of using fuzzy logic in systems [41]. The model will also take into consideration aspects connected with the reliability of the technical system [22][23][24], the effectiveness of its operation [2], [13], [18], [25], [26], [38], [43] and susceptibility aspects [39], [40], [42].…”

Section: Fig 1 Example Of the Security Control Process Diagrammentioning

confidence: 99%

Functional Readiness of the Security Control System at an Airport with Single-Report Streams

Kierzkowski

Kisiel

2015

Advances in Intelligent Systems and Computing

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Abstract. The article presents a developed universal simulation model supporting the design process of the security control area at the airport. The universality of the simulation model allows for its use for the adaptation of the size of the security control area which consists of security check stations with a single flow of passenger streams to the forecast intensity of reporting passengers. The presented model is mostly intended for regional airports, where the security control is conducted using a metal detector and an x-ray device. The functional readiness of the designed system is analysed in terms of the forecast intensity of passenger reports. The functioning of the simulation model is based on time characteristics determined on the basis of research conducted on a real system which allowed for the verification of the functioning of the model. It is also possible to introduce one's own characteristics to optimise another existing real system.

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Section: Fig 1 Example Of the Security Control Process Diagrammentioning

confidence: 99%

Functional Readiness of the Security Control System at an Airport with Single-Report Streams

Kierzkowski

Kisiel

2015

Advances in Intelligent Systems and Computing

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“…in the paper [63], which presents an algorithm of applying the delay time concept in the operation of complex systems. Then, in [83], the authors proposed a modelling algorithm for inspection processes in multi-element systems performance, where the process of defects occurrence is of the NHPP type.…”

Section: Methodology Of Delay Time Concept Use In the Modelling Of Tementioning

confidence: 99%

Use of delay-time concept in modelling process of technical and logistics systems maintenance performance

Werbińska-Wojciechowska

Zając

2015

Eksploatacja i Niezawodnosc - Maintenance and Reliability

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execution time of (internal and external) placed customer's • order -specifying the time between the moment the order has been placed by the customer and its completion. In this case, the concept of time is relative to the level of supported enterprise performance as perceived by the customer, resource efficiency in the basic processes of the supported en-• terprise. For instance, in the case of manufacturing systems, the concept of time is directly related to minimizing downtime and optimizing capacity utilization, duration of various fundamental processes, covering the pe-• riod from the time when all resources necessary to perform the process are ready for use, until the moment the result of the process has been achieved. The concept of time directly depends on the thorough identification of the process structure.Therefore, accurate determination of the time relations in the logistic system will depend e.g. on the type of the modelled system (storage, transport, etc.), the type of operating task, the definition of the efficiency type that is essential in the system (e.g. whether one is interested in the system's efficiency within a certain time horizon), and the behaviour of the system during its downtime (whether a single failure should affect the reliability of the whole system). The basic classification of system models with a time resource, taking into account the above features, has been presented e.g. in [88, 89].The article focuses on the issues associated with the maintenance modelling of logistics systems using Delay Time Analysis approach, with particular emphasis on the methodology applying the concept of delay time in practice. The second part of the article focuses on the analysis of an internal transport system of a manufacturing company in the metallurgical sector. The proposed methodology was used to assess the reliability and the expected maintenance costs of the operating forklifts. Modelling of technical and logistical systems maintenance processes using delay time analysisThe papers published over the last 50 years cover a wide range of problems in the area of modelling and design of maintenance processes in technical facilities (maintenance theory). Issues often discussed in the literature regard the areas of reliability modelling or necessary supplies providing for operational processes performance of e.g. production and transportation systems (e.g. works [6, 46, 47, 65,72,75, 76]), or the uncertainty of operating data (e.g. works [7, 57, 93]). A basic overview of these research works was presented in one of the first articles - [62], and later developed and extended by the authors . The importance of the tasks related to the analysed research area as well as its diversity is supported by many studies (e.g. [18, 52, 53,54, 55, 61, 69, 77]), where the authors provide an overview of basic models of selecting an optimal maintenance strategy for both single-and multi-element systems. At the same time, papers focused to the issue of maintaining single-element systems have been analysed e.g. ...

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“…According to the above, one of the most important things in transportation networks' analysis is the finding of the bottlenecks. They impose delays and restrictions in the normal flow of transportation [18][19][20][21][22]. There are three major types of bottlenecks:…”

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confidence: 99%

Graph Theory Approach to the Vulnerability of Transportation Networks

Guze

2019

Algorithms

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Nowadays, transport is the basis for the functioning of national, continental, and global economies. Thus, many governments recognize it as a critical element in ensuring the daily existence of societies in their countries. Those responsible for the proper operation of the transport sector must have the right tools to model, analyze, and optimize its elements. One of the most critical problems is the need to prevent bottlenecks in transport networks. Thus, the main aim of the article was to define the parameters characterizing the transportation network vulnerability and select algorithms to support their search. The parameters proposed are based on characteristics related to domination in graph theory. The domination, edge-domination concepts, and related topics, such as bondage-connected and weighted bondage-connected numbers, were applied as the tools for searching and identifying the bottlenecks in transportation networks. Furthermore, the algorithms for finding the minimal dominating set and minimal (maximal) weighted dominating sets are proposed. This way, the exemplary academic transportation network was analyzed in two cases: stationary and dynamic. Some conclusions are presented. The main one is the fact that the methods given in this article are universal and applicable to both small and large-scale networks. Moreover, the approach can support the dynamic analysis of bottlenecks in transport networks.

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On the definition of functional reliability

Cited by 11 publications

References 1 publication

Functional Readiness of the Security Control System at an Airport with Single-Report Streams

Functional Readiness of the Security Control System at an Airport with Single-Report Streams

Use of delay-time concept in modelling process of technical and logistics systems maintenance performance

Graph Theory Approach to the Vulnerability of Transportation Networks

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