• Semester 6, position 4

Perception of position and cost of maintenance within life cycle of technical systems. Acquaint ion with parameters which affect design of maintenance organization. Practical determination and analyze of technical system reliability. Acquaint ion with standard malfunctions, methods for condition monitoring as well as with equipment for condition monitoring. Overwhelm with methods for determination of replacement and reparation strategies, maintenance costs and inventory optimization. Acquaint ion with possibilities of maintenance system optimization and application of computer systems – business solutions.

Curriculum overcome enables overwhelm with necessary knowledge and skills (models, optimization procedures, monitoring and measure equipment, basics of computer systems – business solutions) for implementation in maintenance organizations of complex technical and complex systems.

Significance, organization parameters and structure of maintenance system. Reliability of technical systems – reliability of element until first failure. Empirical determination of element reliability and reliability of complex systems. Recovery process and strategies of replacements and reparations. Replacement models. Categorisation and planning of maintenance works. Standard malfunctions and methods for machine condition monitoring. Methodology for weak spots seeking. Maintenance costs. Spare parts. Inventory optimization. Inventory management – deterministic and stochastic models. Determination of indicators of maintenance system work. Queuing theory – finite source (calling population) systems. Occupational safety and health at work. Inspection and examination of work equipment. Examining the conditions of working environment. Enterprise Asset management. Introduction to basics and navigation in SAP solutions based on SAP ERP.

Audit lessons (Maintenance position in company organisation structure. Reliability of element until first failure calculation. Reliability of complex systems – examples of serial, parallel, passive parallel, partially parallel relations between elements. Strategies and models of replacements – examples with and without discount factor (rate) and with compete and partial write-off. Repair (maintenance) complexity. Weak spots. Inventory management – deterministic and stochastic models. Queuing theory – finite source (calling population) systems – models with and without help between servicing channels.). Occupational safety and health at work - practical examples. Seminar work (Analysis of gathered data about malfunction on real system, determination of malfunction intensity, determination of probability density function of time until malfunction, using chi-square test.). Laboratory work (Acquaint ion with standard and advanced equipment for system condition monitoring - SKF, as well as with possibilities of implementation of maintenance module in company computer systems – business solutions - using exercises & Case study - SAP module EAM (Enterprise Asset Management)).

There is no special conditions needed for course attending

1. Bugaric, U.: Lecture handouts, Faculty of Mechanical engineering Belgrade, Belgrade, 2008-2011. 2. Bugaric, U., Petrovic, D.: Servicing system modelling, Faculty of Mechanical engineering Belgrade, Belgrade, 2011. 3. Bugaric, U.: Methodology for analysis of single position machines work, Foundation Andrejevic, Belgrade, 2003. 4. Bugaric, U., Petrovic, D.: Softvare for verification of sample belongings to theoretical distribution using chi-square test, Faculty of Mechanical engineering Belgrade, Belgrade, 1996-2010. 5. Klarin, M., Ivanovic, G., Stanojevic, P., Raicevic, P.: Principles of therotechnological actions, Faculty of Mechanical engineering Belgrade, Belgrade, 1994. 6. Software: QtsPlus 3.0 (Queuing theory software Plus). 7. Practical instruction in industrial environment (SKF, SAP). 8. Mobile devices for measurement of temperature and vibrations. 9. Personal computers.

Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

Auditory exercises: 15
Laboratory exercises: 10
Calculation tasks: 0
Seminar paper: 5
Project: 0
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 0
Review and grading of lab reports: 3
Review and grading of seminar papers: 1
Review and grading of the project: 0
Test: 6
Test: 0
Final exam: 5

Activity during lectures: 10
Test/test: 40
Laboratory practice: 10
Calculation tasks: 0
Seminar paper: 10
Project: 0
Final exam: 30
Requirement for taking the exam (required number of points): 30

Baldin, A., Furlanetto, L., Roversi, A., Turco, F.: Handbook for maintenance of industrial plants, Održavanje Mašina i Opreme – OMO, Belgrade, 1979.; Ivkovic, S.: Failures of mining machine elements, Rudarsko-geološki fakultet Beograd, Belgrade, 1997.; Vukadinovic, S., Teodorovic, D.: Elements of reliability theory and recovery theory of technical systems (second edition), Privredni pregled, Belgrade, 1979.; Vujanovic, N.: Reliability theory of technical systems (second edition), Vojnoizdavački i novinski centar, Belgrade, 1990.; Hillier, F. S., Lieberman, G. J.: Introduction to operations research (seventh edition), McGraw-Hill, New York, 2000.