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Jezdimir Knezevic

Jezdimir Knezevic
MIRCE Akademy

Bachelor of Engineering

About

87
Publications
30,398
Reads
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1,187
Citations
Citations since 2016
35 Research Items
425 Citations
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20162017201820192020202120220204060
Introduction
The "father" of MIRCE Science - a body of knowledge that computes the time evolution of industrial systems by subjecting mechanisms of natural and human actions to the laws of mathematics. Axioms, equations and methods of MIRCE Science enable accurate predictions of performance of operationally defined industrial systems, at the time when all changes can be made with not much extra time and cost. The benefits of using is directly proportional to the consequences of not use it.

Publications

Publications (87)
Article
The main objective of this paper is to introduce the management community to the body of knowledge contained in MIRCE Science for the innovative approach to the management of functionability events for the provision of expected work. Thus, management manages the consequences of the complex interactions between potential occurrences of negative func...
Article
Full-text available
Unlike Earth’s weather, which is manifested through physical phenomena like wind, snow and rain, space weather is manifested through physical phenomena like evolving ambient plasma, magnetic fields, radiation and particle flows in space. Both types of weather have impact on the motion of functionable systems through MIRCE Space and their functionab...
Article
Full-text available
"If you watch a glacier from a distance, and see the big rocks fallings into the sea, and the way the ice moves, and so forth, it is not really essential to remember that it is made out of little hexagonal ice crystals. Yet if understood well enough the motion of the glacier is in fact a consequence of the character of the hexagonal ice crystals. B...
Conference Paper
Full-text available
“Sipping a cold beer in the transit lounge of Kisumu Airport, Mr A.W. Sambu, a Nairobi business man, said: It appears that I shall be here for two weeks. Our Kenya Airways flight to Berlin could not take off because as we boarded her the plane developed a flat tyre. The ground staff tried to reinflate it with a bicycle pump – but all in vain. I thi...
Conference Paper
Full-text available
In today's logistic practice, logisticians collect data, compute MTBF or failure rates =1/MTBF. Afterwards, all the downstream LSA tasks are based on this information. This approach has been fostered by existing standards and consequently all commercially available LSA models have adopted it. As, in this approach, the failure rate is not the funct...
Conference Paper
Full-text available
Emphasis on the elimination or reduction of human error in maintenance and its consequences is a relatively recent phenomenon. Human error in maintenance can result in maintenance error that may potentially degrade the performance of the system and possibly give rise to extremely serious safety and economic consequences. Most efforts in addressing...
Conference Paper
Full-text available
This paper provides an introduction to the physical side of the MIRCE Mechanics, a new discipline that systematically studies the life of machines to scientifically understand the mechanics of the motion of in-service reliability, cost and effectiveness, phenomena in order to predict it. The life of machines is viewed as a sequence of functionabili...
Chapter
The main objective of this chapter is to introduce the reliability engineering community to the innovative mathematical scheme contained in MIRCE Science for describing and predicting the time evolution of physical systems. Thus, the impact of reliability engineering decisions on complex interactions between failure events and maintenance actions t...
Article
Full-text available
Key words Microbial contamination of aviation fuel tanks is a known physical phenomena to airlines that are dealing with it in accordance to manufacturer guidelines. However, as the disastrous COVID-19 pandemic has left aircraft grounded and scattered across airfields around the world there is a danger that contaminated fuel could cause undesirable...
Article
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The COVID-19 outbreak has shown that pandemics, like other rarely occurring natural catastrophes, have happened in the past and will happen in the future. Although humans cannot prevent dangerous viruses from emerging, they should be prepared to dampen their consequences for the economy and all of society. The main objective of this paper is to add...
Chapter
According to Knezevic, the purpose of the existence of any functionable system is to do work. The work is done when the expected functionality (function, performance, and attributes) is delivered through time. However, experience teaches us that the work expected to be done is frequently beset by failures, some of which have safety consequences to:...
Article
Full-text available
Visual Displays of Dynamic Information (VDDI) represent the interface that machines use to communicate their dynamic functionability state to humans. This paper tries to address the question of the selection between the two main types of VDDI available, digital or analogue, and identify what some of the most important factors are that may affect t...
Article
Full-text available
Preface "Oh, we humans, never content to remain on the earth that holds us down with its gravity and sustains us with oxygen-laden atmosphere to breathe. No, as soon as we figured out how to ascend into that atmosphere, cheating gravity with hydrogen-filled balloons or artificial wings, we were compelled to claw our way ever higher into the thin, c...
Article
Full-text available
The paper addresses the microbial decontamination of fuel tanks as a physical mechanism of the motion of an aircraft through MIRCE Space, in accordance with MIRCE Science 1. In cases where microbiological contamination is detected and decontamination needs to be done with biocides, up-to-date instructions in the Aircraft Maintenance Manuals should...
Article
Full-text available
According to Knezevic the purpose for the existence of any functionable system is to do functionability work [1]. The work is done when the expected measurable function is performed through time. However, experience teaches us that expected work is frequently beset by the occurrences of undesirable interruptions like component failures, natural phe...
Conference Paper
Full-text available
Commonly, maintenance is perceived as "fixing broken things". As such, it is associated with failure consequences and unplanned expenses, both of which negatively impact business plans or customer satisfaction. However, as failures are an inevitability of the life of any technological system, it would be worthwhile to start looking at maintenance a...
Article
Full-text available
Scientific principles and concepts expressed through the laws, equations and formulas are the bedrock for the prediction of the design-in functionality performance of any engineering creation. However, there is no equivalent when the in-service supportability performance predictions have to be made. Hence, MIRCE Science 2 has been created at the MI...
Article
Full-text available
The purpose of a paper is to address the troubleshooting, an activity performed by maintainers to identify failed component or module, as a mechanism of the motion of a functionable system through the MIRCE Functionability Field. For effective maintenance troubleshooting, as one of the main drivers of the "speed" of moving through negative function...
Article
Full-text available
According to Knezevic the purpose for the existence of any functionable system 1 is to do functionability work. The work is done when the expected measurable function is performed through time. [1] However, experience teaches us that expected work is frequently beset by the occurrences of undesirable interruptions like component failures, natural p...
Article
Full-text available
The philosophy of MIRCE Science is based on the premise that the purpose for the existence of any functionable system is to do functionability work. The work is done when the expected measurable function is performed through time. In MIRCE Science a flight crew is considered as an element of a flying system type. MIRCE Mechanics is a part of MIRCE...
Article
Full-text available
The main objective of this paper is to demonstrate the necessity of addressing all physical causes that lead to the transition of maintainable systems from positive to negative functionability state during their lives. Addressing the reliability characteristics of components and systems in isolation from the analysis of the impact of the natural en...
Chapter
The philosophy of MIRCE Science is based on the premise that the purpose of existence of any functionable system [Functionable system type is a set of mutually related physical entities and human made rules uniquely put together to do functionability work.” (Knezevic in The origin of MIRCE Science. MIRCE Science, Exeter, UK, [1])] is to do function...
Article
Full-text available
MIRCE Mechanics is the discipline of MIRCE Science that focuses on the scientific understanding and description of the phenomena that govern the motion of functionable system types though the MIRCE Functionability field [1]. A full understanding of the mechanisms that generate the motion is essential for the accurate predictions of the functionabil...
Article
Full-text available
MIRCE Science is a theory for predicting expected functionability performance for a functionable system type. The accuracy of the prediction is governed by the extent of the scientific understanding of the mechanisms, natural and human rules, that govern the motion of a functionable system types though MIRCE Space. Thus the main objective of this p...
Research
Full-text available
According to Knezevic [1] the purpose of the existence of any functional system is to do work. The work is done when the expected measurable function is performed through time. However, experience teaches us that expected work is frequently beset by failures, some of which result in hazardous consequences to: the users; the natural environment; the...
Article
Full-text available
MIRCE Mechanics is a part of MIRCE Science that focuses on the scientific understanding and description of the physical phenomena and human rules that govern the motion of functionable system types though MIRCE Space [01]. A full understanding of the mechanisms that influence this motion through MIRCE Space is essential for accurately predicting th...
Article
Full-text available
The main objective of this paper is to demonstrate the necessity of addressing all physical causes that lead to the transition of maintainable systems from positive to negative functionability state during their lives. Addressing the reliability characteristics of components and systems in isolation from the analysis of the impact of the natural en...
Article
Full-text available
A thorough analysis of data on aircraft lifecycle revealed inadequacy of current lifecycle management methods in the face of increased complexity of the Internet-based global market. A new method for managing lifecycle has been developed by authors and their teams using concepts and principles of the emerging complexity science with the aim of redu...
Article
Full-text available
A thorough analysis of data on lifecycle of industrial systems revealed inadequacy of current lifecycle management methods in the face of increased complexity of global, the Internet based, market. The purpose is to describe a new method for managing lifecycle of industrial systems developed by professor Rzevski. The new method is based on concepts...
Article
Full-text available
Aerotoxic syndrome is a somewhat controversial condition that could be triggered by the air compression systems in commercial planes. Some of the air that is compressed and recirculated throughout the cabins originates in jet engines; when excess oil molecules enter that air supply, it can result in what is called a "fume event" Thus, the main obje...
Article
Full-text available
Mirce Mechanics is a scientific theory of the motion of in-service systems through Mirce Spacetime that enables prediction of the work done by them to be made by using Mirce Equations. Practical applications of Mirce Mechanics are possible only, when the physical mechanisms that generate the motion of systems through positive and negative states of...
Article
Full-text available
Preliminary notes SUMMARY Commonly, maintenance is perceived as "fixing broken things". As such, it is associated with failure consequences and unplanned expenses, both of which negatively impact business plans or customer satisfaction. However, as failures are an inevitability of the life of any technological system, it would be worthwhile to star...
Article
Full-text available
Purpose – The purpose of this paper is to address the maintenance errors caused by the lack of understanding of maintenance manuals. English is the official language of civil aviation and all relevant maintenance manuals are written in it, but – for 80 per cent of the global maintenance personnel who are using such manuals – English is not their na...
Article
Full-text available
Mirce Mechanics is a scientific theory of the motion of in-service systems through Mirce Spacetime that enables prediction of the work done by them to be made by using Mirce Equations. However, practical applications of Mirce Mechanics are possible only, when the physical mechanisms that generate the motion of systems through positive and negative...
Article
Full-text available
Mirce Mechanics is a scientific theory of the motion of maintainable systems through Mirce Spacetime resulting from any actions whatsoever and the actions required to produce any motion accurately proposed and demonstrated. Hence, the main objective of this paper is to present the Mirce Mechanics based analysis of the scheduled passenger flight, th...
Article
Full-text available
The main objective of Mirce Mechanics is the understanding of mechanisms that generate positive and negative functionability events, which cause the motion of a system through corresponding functionability states. Hence, this paper addresses the mechanism of the collision between birds and flying objects, commonly know as a bird strike. This is typ...
Article
Full-text available
Birds represent a serious, but often misunderstood, threat to aircraft. Most bird strikes do not result in any aircraft damage, but some bird strikes have led to serious accidents involving aircraft of every size. According to Bird strike Committee USA, bird and other wildlife strikes to aircraft result in over $600 million in damage to U.S. civil...
Article
Full-text available
The second Axiom of Mirce Mechanics, states, "The probability of faulty execution of any maintenance task is greater than zero". Analysis of maintenance processes clearly shows that ineffective communication between system designers and maintenance personnel, through maintenance documentation, is a well-recognised contributor to the occurrence of f...
Article
Full-text available
Purpose The purpose of this paper is to develop a science‐based formulation of quality of maintenance processes. Design/methodology/approach The paper takes the form of scientific analysis of the faulty maintenance tasks to determine the pattern of phenomena and to understand the nature of causing mechanisms. Findings Faulty maintenance tasks are...
Article
Full-text available
Reliability Theory, since it's beginnings in 1950s, has been based on mathematical theorems rather then on scientific theories. Massive attempts where made to further applications of the existing mathematical and statistical methods and analysis without attempts for understanding "failure mechanics". Then, in 1980s, practicing reliability engineers...
Book
Full-text available
The Handbook of Maintenance Management and Engineering covers a wide range of topics in maintenance management and engineering. It includes extensive references to the theoretical foundations, recent research and future directions of this important subject. Using applications and examples which reflect the growing importance of maintenance, this bo...
Chapter
According to Albert Einstein, “Everything that the human race has done and thought is concerned with the satisfaction of felt needs.” Einstein (1991). Thus, need for transporting, communicating, racing, entertaining, heating, navigating, and similar functions are daily manifested by the human race. It is common practice to use the word system as a...
Article
A methodology is developed which uses Petri nets instead of the fault tree methodology and solves for reliability indices utilising fuzzy Lambda–Tau method. Fuzzy set theory is used for representing the failure rate and repair time instead of the classical (crisp) set theory because fuzzy numbers allow expert opinions, linguistic variables, operati...
Article
The paper presents a methodology based on relevant condition predictor (RCP) for reliability prediction for systems under condition-based maintenance. By considering the event of not being able to recognise the fault initiation or the critical state in RCP-based maintenance, the methodology uses Markov models for reliability prediction. The cases o...
Article
Full-text available
Mathematical models for reliability prediction under multiple condition parameters are discussed. The models are developed under the assumption that the different condition parameters can be independent or dependent. Presents a model based on the continuous time Markov chain where the rate of degradation of the system depends on the state of the sy...
Chapter
To predict various reliability characteristics of an item, as well as its maintainability and supportability function, it is essential that we have sufficient information on the time to failure, time to repair (maintain) and time to support characteristics of that item. In most cases these characteristics are expressed using theoretical probability...
Chapter
Ever since the Industrial Revolution began some 21/2 centuries ago, customers have demanded better, cheaper, faster, more for less through greater reliability, maintainability and supportability (RMS). As soon as people set themselves up in business to provide products for others and not just for themselves, their customers have always wanted to ma...
Article
Considers the new role of chief mechanic at Boeing – a role introduced for the 777 model. Looks at factors such as design build teams made up of members from areas such as engineering and customer support and who stayed involved throughout the design process. Considers aspects such as maintainability impact on availability and the education of desi...
Article
The paper analyses the concept of maintenance free operating period (MFOP), the reliability requirement driven by the Ministry of Defence (UK) for the next generation of future aircraft to be included in the fleet. Since the traditional reliability requirement MTBF (mean operating time between failure) has several drawbacks, the immediate reaction...
Conference Paper
This paper looks at the concept of evolutionary maintenance. This approach is especially useful for expensive, complex systems, such as aircraft engines. In evolutionary maintenance, the maintenance and inspection schedule is adjusted after every service activity. The requires knowledge of the time-to-failure of each module of the engine and the co...
Conference Paper
The classical approach to the calculation of reliability characteristics is based on the probability distribution of time to failure. Recently, a new approach based on relevant condition parameter was introduced, which describes the condition of the system and calculates the reliability characteristics at every instant of operating time. A conditio...
Article
Presents results obtained from research of a model of change in condition of systems with a view to raising effectiveness of a technological trial (testing) and to improving preventive maintenance. On the basis of this model, it follows that maximum dispersion of the condition parameter can be used as an early diagnostic parameter. A possible scree...
Article
High reliability, maintainability, safety and supportability are expected from today’s modern systems. In the recent years supportability has been widely accepted as a major factor in logistics discipline. The main purpose of this paper is to demonstrate how advanced mathematical models can be used to analyse the effect of supportability on systems...
Article
In this article, we develop mathematical models for spare components with exponential, gamma, normal and Weibull time to failure distribution using a renewal process. The models can be used to predict the number of spares required for a component or system to achieve specified inherent availability. The paper also presents optimization models for s...
Article
Deals with sources of fuzziness in individual parts and stages of maintenance and utilization of vehicles in large fleets. Effective vehicle fleet maintenance management requires data on reliability and maintainability. In most cases, however, available data are insuffucient for proper statistical identification of performance, making it impossible...
Article
Full-text available
Over the past decade the education system in the UK has been heavily criticized for its irrelevance to industry. Employers, in particular, have been concerned that the values and products of the system do not meet their requirements. Meeting these requirements presents many challenges and, indeed, raises many fundamental questions about the aims an...
Article
Proposes optimization models for spare provisioning. In the first model, considers a series system with m components where each component can have a maximum of (n-1) spares. The objective function is to maximize the availability of the system satisfying a constraint on space required for the spares. In the second model, considers a series-parallel...
Article
A structured and disciplined system engineering process is essential for the effective and efficient development of products and systems which are responsive to customer requirements and competitive within a global marketplace. Rigor and discipline during the later phases of system design (preliminary and detail) cannot compensate for an ill-concei...
Article
In the current drive to improve product quality through its reliability, maintainability and supportability characteristics, supportability has emerged as the key area in which customers can have an impact, the other two aspects being increasingly integrated into the product design phase. Previous work on supportability has indicated that product o...
Article
Attempts to improve the quality of the products or systems which customers purchase have focused traditionally on improving the availability of the product through its reliability or maintainability characteristics. However, a growing awareness of the importance of integrating reliability and maintainability considerations into the design phase of...
Article
Investigates the use of a genetic-algorithm program for analysing the optimal opportunity-based maintenance problem for real-sized systems. Analyses the performance of the genetic operators with a generation replacement genetic algorithm, using a hypothetical system consisting of 50 maintenance-significant parts. Due to the size of the problem and...
Article
Describes the development of two genetic algorithm (GA) programs for cost optimization of opportunity-based maintenance policies. The combinatorial optimization problem is formulated and it is shown that genetic algorithms are particularly suited to this type of problem. The theoretical basis and operations of a standard genetic algorithm (SGA) are...
Article
Accurate selection of the quality of maintenance resources, such as spares, tools, equipment, personnel, technical data, facilities and so forth, has a strong influence on mission success, and the cost of ownership. Among maintenance resources, spare part requirements are the most difficult to predict. Items within any system are very different fro...
Article
Among the maintenance resources, the spare parts are the most difficult to predict. Items in the space systems are very different from the point of view of reliability, cost, weight, volume, etc. The different combinations of spares make different contribution to the: mission success, spare investment, volume occupied and weight. Hence, the selecti...
Article
Accurate selection of the quantity of logistic support resources has a strong influence on mission success, system availability and the cost of ownership. At the same time the accurate prediction of these resources depends on the accurate prediction of the reliability measures of the items involved. This paper presents a method for the advanced and...
Article
Prediction of the duration of the downtime caused by maintenance, especially in the cases where the system considered consists of several repairable items, presents a challenge for maintenance managers, because of possible revenue losses during these intervals of time. Responds to this challenge through the new methodology for the fast, accurate pr...
Conference Paper
The uncertainty which manifests itself in most engineering design analyses and evaluation activities is of two types. Uncertainty as a result of randomness and uncertainty as a result of imprecision. While probability theory has been used to address stochastic uncertainty very effectively, the theory of fuzzy subsets and fuzzy logic (possibility th...
Article
The design process for a marine vehicle is essentially an iterative process where different characteristics and parameters are modified until the optimum compromise is achieved. However, in day to day running of these vehicles we notice that they don't perform as well as we expect. This is an indication that some of the parameters have been ignored...
Article
The main objective of the paper is to demonstrate the method for the accurate calculation of the MTTF, MTTR and other measures of reliability and maintainability because they are the basis for a number of decisions made during the life cycle of an engineering system. The method is applicable to any type of engineering systems whose consisting modul...
Article
The intention of this paper is to acquaint those who deal with pipeline systems with a new approach to maintenance. The approach outlined in this paper for the optimisation of maintenance activities is one of only a few which consider required reliability level as the optimisation criterion. An example shows the potential usefulness of the new meth...
Chapter
The classical approach to the determination of reliability characteristics is based on empirical data which represent operating time to the failure of several systems or components. Thus reliability assessment is a process which takes place after the failures have occurred. The main aim of this paper is to present a new approach which enables relia...
Chapter
The classical approach to the calculation of reliability characteristics is based on the probability distribution of the recorded times when the transition from a state of functioning to a state of failure occur. The system/component under consideration is accepted as a “black box” which performs the required function until it fails. The RCP-based...
Article
The classical approach to the calculation of reliability characteristics is based on the probability distribution of time to failure. The system under consideration is accepted as a ‘black box’ which performs the required function until it fails. This paper presents an ‘engineering’ approach to the calculation of reliability characteristics which a...
Article
Full-text available
This paper presents a practical example of the application of a new method for condition-based maintenance which has been recently developed by one of the authors. The work described relates to the maintenance of contactors in a fleet of electric delivery vehicles. The paper outlines the tests necessary to provide the data required and explains the...
Article
Full-text available
A new approach to maintenance problems is proposed to provide the required reliability level for each individual system and reduce the maintenance cost as a result of prolonging the realisable operating life of the system. To achieve that goal a reliability function was assessed using the probability distribution function of a relevant condition pa...
Article
In this paper a new methodology and an algorithm for selecting an optimal part-replacement policy for complex engineering systems with more than one renewable element are developed. The principal aim of the paper is to show how to reduce the number of outages of a system using an appropriate group replacement strategy which minimizes the total repl...
Article
Full-text available
This paper gives the procedure for the reliability calculation of mechanical components and structures. The stability (buckling) of a tin panel subjected to in-plane combined (normal and shearing) loads is considered in particular. The attention is focused on the buckling analysis of the typical thin-walled aircraft structure such as the skin of wi...

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Projects (3)
Project
To develop a set of methods and tools for managing complexity in geopolitical constellations, business and engineering