Maintenance Engineering and Management

A major drawback to Industry 4.0 that few write about is maintenance of an industry 4.0 plant. The maintenance aspect is a much greater and immediate drawback than even the commonly known major concern of security, and the lesser concern of system integration standards. Maintenance of 4.0 systems has, and will continue to result in related huge increases in process downtime. The barriers to overcoming the maintenance/downtime drawbacks of a 4.0 system are almost insurmountable.

ABSTRACT Filler material choice for repair welding of stop valve spindle of thermal power plant by-pass pipeline was presented in this paper. Repair welding of the stop valve spindle was necessary because of plant operating problems due to very frequent localized damage appearance in the form of erosive wear on it. For this purpose it was necessary to choice appropriate filler material with high wear resistance characteristic. Experimental investigation and testing (hardness measurement, chemical composition analysis and microstructural investigation) of prepared specimens after welding simulation with different kind of filler material was performed. On the basis of obtained results it was recommended procedure for application of the filler material with generally preferable characteristic.

Vertical cylindrical vessel-chambers as a part of coal — drying plants, whose purpose is to collect wastewater, are supported at 3 points in upper dish head area and are made of fine-grained Mn steel plates, joined by welding. Significant thinning and leaking in upper dish head area of the vessel occurred due to original design provoking an intensive abrasion, cracking and rupture. After reconstruction, in the upper zone of cylindrical shell, two new joints were made in sity by manual arc welding, with subsequent, local post-weld heat treatment. However, cracks appeared firstly in new welded zones in radial and axial joints, and then in zones of openings. Later, the similar failure features began to appear in the area of original welded joints. All of these cracks were repaired by properly specified technology. Unfortunately, after some period of exploitation the initiation of new cracks was observed, at first by the visual inspection. This problem was detected in the repaired areas...

You can found the answer for all of this questions in this paper ..
What do bearing designation numbers mean?
What does C3 in a bearing designation refer to?
What does SKF stand for?
What does JEM mean in SKF Bearing?
What does ZZ mean on a bearing?
What does RZ mean on a bearing?

LinkedIn Contact :
https://www.linkedin.com/in/eng-moustafa

AIRCRAFT CONTINUING AIRWORTHINESS METHODOLOGY BASED ON
THE CONTROL OF THE MAINTENANCE SYSTEM EFFECTIVENESS.
The article outlines some theoretical and methodological aspects of an interface between the continuing airworthiness and maintenance system effectiveness control for civil aeronautical products through the design and operation stages in order to improve national regulatory and methodical basis in the field of consideration, taking into account recent developments in reliability theory, information technologies, and international regulations.
В статье рассмотрены теоретические и методические аспекты взаимосвязи процессов поддержания летной годности и управления эффективностью системы технического обслуживания и ремонта гражданской авиационной техники при ее создании и эксплуатации, направленные на совершенствование отечественной нормативно-методической базы в этой области знаний с учетом современных достижений теории надежности, информационных технологий и международных норм.

A planetary trains for multi-speed is mainly used for automation in industries of automobile. A planetary
gear train is represented by a graph. It is identified by (i) number of vertices and their connectivity (ii) number of edges and their types and values (iii) fundamental circuits, their size and adjancy. Connectivity of individual link is a property characteristic of kinematic chain. It is possible to identify a planetary gear,therefore of using sets of labele (decimal numbers representing connectivity ) of individual link. The
connectivity of vertices , edges values and circuit values, related to design invariants which in turn indicates the possible behavior of the gear train ( for example capacity of power transmission, speed ratio and power carculation). For a specified degree – of – freedom a number of planetary gear kinematic chain (PGKCs) are selected and hence planetary gear trains (PGTs) can be formed with a given number of links
and joints so that designer must be able to select to select the best train from the view point of say velocity ratio and capacity of power transmission, space requirements etc. Synthesis of planetary gear kinematic chain and planetary gear trains has been studied(1-9). Almost all reported work deals with only
identification of distinct chains. Besides providing an atlus of chains, this in itself does not provide any help to designer in the selection of best possible gear train. In the present paper a simple method based of circuit property ( based on link-link shortest path distance and degree of links) is presented to determine the topology values of power transmission efficiency and topology power transmission capacity of five-links PGKCs and their distinct inversions

Total productive maintenance (TPM) has become one of the most popular maintenance strategies to ensure high machine reliability since it is regarded as an integral part of lean Manufacturing. One of the main objectives of TPM is to increase the overall equipment effectiveness of plant equipment with a modest investment in maintenance. Companies around the world spend a lot of money on buying new machinery to increase the production, however a little is done to get hundred percent output from the machines. Nevertheless, because of increased competition and demand of quality products at lower costs, buying latest equipment is not a solution unless it is fully utilized. Therefore machine maintenance and in particular, implementing an appropriate maintenance strategy has become increasingly important for manufacturing industries to fulfill these requirements. In this regard, this paper has focused on a case-study work with the aim of evaluating the effects of total productive maintenance implementation onto the existing production scenario of a selected semiautomated manufacturing company of Bangladesh by measuring downtime and mean downtime reduction and performing mean downtime analysis (MDT). Pareto analysis and statistical analysis of downtime data have been conducted to identify the most affecting downtime factors hierarchically. Based on the results summarized, modern maintenance management and production improvement techniques have been suggested to improve the maintenance procedure and at the same time to enhance the volume of production as well.

This research study proposed a novel algorithm, called time-counter, to optimise inspection intervals of production systems. The developed algorithm was applied to two active draglines. The algorithm evaluated random uptime/downtime characteristics of the draglines and the planned dragline halts in the mine. Physical and random non-physical costs were included and annual maintenance cost minimisation was achieved. Dragline-1 and Dragline-2 inspection intervals were optimised as 232 and 184 h and their maintenance costs were reduced by 5.9 and 6.2% compared to the current interval, respectively. This study is the first initiative in cost-effective inspection interval optimisation of a mining machinery.

Nom Signification OU La sortie A est générée si au moins une des entrées B1, …, Bn existe ET La sortie A est générée si toutes les entrées B1, …, Bn existent OU exclusif La sortie A est générée si une entrée et une seule Bi (i = 1 à n) existe ET Prioritaire ou séquentiel La sortie A est générée si toutes les entrées B1, …, Bn existent avec un ordre d'apparition donné

Maintenance activities of plant systems and equipment can have a significant impact in reducing the overall plant operational cost, while boosting the efficiency of the plant. Many management personnel still regard plant maintenance as a cost and tend to minimize as much as possible the amount of expenditure from maintenance activities.  However in recent years more and more people have adopted a more positive approach in looking at maintenance works as a profit center.
Maintenance philosophies and activities has evolved from a simple fixing of a malfunction equipment to a more complex and integrated approach of reliability, availability, maintainability and safety of the maintenance planning and process with introduction of such maintenance tools that can review the most likely ways that equipment will fail, which has been a major concern in reliability-centered maintenance (RCM) to ensure that proactive, predictive and preventive maintenance activities could be planned and carried out.  Still, it is not common that maintenance department will adopt a more cautious approach of playing safe and relying on the conventional or usual method of equipment maintenance rather than trying a non-proven method which has been yet to be tested to be efficient just to avoid any complicated matter arising from the process.
Thus, the perspective of looking at maintenance function as not only to maintain but also to enhance the process or the plant operation system as a result of turnaround planning can be very vital to ensure a successful maintenance activities.  Thus rather than restoring or trying to restore the equipment to its original performance, planning a turnaround could better still aimed at enhancing the process and performance of a plant, equipment or any system with the goal of better productivity and efficiency from the system.
This paper will be looking at the maintenance function and as how to maximize the potential benefit of a maintenance activity. The idea might be very different from the conventional philosophy of maintenance but this might be something that well worth a thought for a new perspective in maintenance activities.

In food manufacturing, maintenance of manufacturing equipment is one of the most important essentials for an efficient manufacturing as this sector continuously face challenges that makes maintenance very critical due to the nature of manufacturing, thus as a result food manufacturing companies must add or modify their maintenance strategies in order to keep production running efficiently. The aim of this study is to carry out a maintenance performance evaluation and downtime analysis in a food manufacturing company and suggest areas for further improvement. In this study, an empirical case study was carried out in order to evaluate the maintenance performance and downtime analysis. Overall equipment effectiveness and Pareto analysis were used to carry out a maintenance performance evaluation and downtime analysis on the manufacturing equipment using three years historical data obtained from the food manufacturing company as an industrial case study. The study found that the average overall equipment effectiveness is 55.30% which is a low value when compared with Overall Equipment Effectiveness world standards, meaning that the manufacturing organisation is operating in an average condition and there is a required urgent improvement of maintenance policies and strategies, otherwise it will

— In this paper, a method of designing a hybrid proactive maintenance strategy by incorporating reliability centered maintenance in an existing fixed time maintenance system and riding a curve of maintenance effectiveness for production plants in Zimbabwe (case of Gold-star Harare Refinery) is described. This was done by analysis of the existing maintenance strategy, identifying its shortfalls and solutions to rectify them. A Reliability Centered Maintenance implementation methodology was outlined and by implementing it at Gold-star Harare Refinery, overall equipment effectiveness was increased by 6% through increasing plant availability, performance rate and quality rate by 3.8 %, 1.4% and 2.2% respectively Keywords—Gold-star Harare Refinery (GSHR), Life Cycle Costs (LCC), Key Performance Indicators (KPIs), Overall Equipment Effectiveness (OEE), Preventive Maintenance (PM), Reliability Centered Maintenance (RCM)

Condition monitoring enables reliable and economical way of action for maintenance operations in modern industrial plants. Increasing number of measurement points and more demanding problems require automatic fault detection. Advanced signal processing methods expose failures earlier and provide information on suitable operating conditions of machines. Intelligent methods have been increasingly used in model based fault diagnosis and intelligent analysers. These methods provide various techniques for combining a large number of features.

Lime kilns are large machines, approximately 4 meters in diameter and even more than 100 meters long, with very slow rotational speeds. Depending on production conditions, the kiln must run at different production capacity and rotational speed. The speed is controlled together with the fuel feed and the draught fan speed to obtain good operating conditions. Temperatures in the hot end are very high.

Alignment problems of the kiln are severe because of the high weight affecting on the supporting rolls. Problems may lead to serious damages or even to fire. The situations are very bad for the whole production since lime kilns are essential parts of the chemical recovery cycle of a pulp mill. The chemical pulp production is strongly integrated, and a smooth operation is achieved if all the subprocesses are operating well. Condition monitoring is getting more and more important as the period of continuous operation of the pulp plant is planned to be increased to 18 months. Earlier there have been usually three maintenance shut-downs during a year.

In this paper, a large set of previously collected measurements was analysed with intelligent models based on new features. The acceleration measurements were done on the bearing housing of the supporting rolls. This 97.5 meter long kiln has eight supporting rolls with sleeve bearings, and there are two measurement points for each roll. The rotation time of the kiln is from 42 to 45 seconds, and a rotation of a supporting roll takes from 12.2 to 13.1 seconds.

The sustainability of a facility over the years after scaling hurdles of design, construction and installations, as well as implementation of design requirements in line with specification is very much important and of great value to the asset. This is dependent with the ease at which maintenance actions can be carried out on the facility; thus, this research seeks the following:

Purpose – The purpose of this paper is to explore the applicability of the Decision Making Grid
(DMG) and its usefulness, in practice, in the maintenance of rolling stock in the railway industry. The
Class 319 fleet operated by First Capital Connect (FCC) is used to demonstrate the application of the
DMG.
Design/methodology/approach – The level of use of the data recorded in the CMMS, in the
decision making process for reviewing, and updating the maintenance policy, was established through
discussions with senior management at FCC. Available decision support systems were then
researched, with emphasis on the DMG concept. The advantages of using the DMG and its application
in the real world using data for the Class 319 fleet were then explored and are discussed in this paper.
Findings – This paper discusses the value in applying the DMG concept in the decision-making
process for prioritising systems and the work that should be done to ensure the maintenance policy
takes into account the performance of the units of rolling stock against the most important criteria for
FCC. Through the research carried out, it was established that the existing CMMS already records the
data required for the application of the DMG, although in itself, the CMMS does not have any decision
support capabilities.
Originality/value – Although a number of different CMMSs are used in the railway industry, few or
none of these are capable of providing decision support for maintenance. This paper explores the use
of the DMG concept to demonstrate the use of data recorded in the CMMS to develop a more effective
maintenance policy and to determine exactly which maintenance activities need to be carried out in
order to remedy the worst performing systems in terms of the most important criteria as identified by
the business.

MACQ : approche inductive mettant en évidence les facteurs pouvant influencer les séquences d'événements conduisant à un scénario d'accident MACQ : méthode bien adaptée pour apprécier les risques dans des installations industrielles contenant de nombreux systèmes de sécurité Méthode de l'Arbre des Conséquences (MACQ) ou des Événements : introduite aux USA en 1972 pour évaluer les risques liés aux centrales nucléaires Scénario d'accident = séquence d'événements aboutissant finalement à un accident L'événement initiateur peut entraîner un scénario d'accident s'il y a échec des opérations de maîtrise des risques liés aux systèmes de sécurité Evénement initiateur = défaillance ou événement indésirable qui initie le déclenchement d'une séquence d'événements pouvant causer un accident Evénement intermédiaire = événement se produisant entre l'événement initiateur et l'événement final de la séquence (accident ou non)

This paper presents an analysis of the various costs related to equipment used in heavy construction in order to obtain the hourly operating cost of the equipment, parameter used to evaluate the productivity and viability of equipment for machine rental companies. The value of the hourly cost was obtained by calculating the values of the cost of property, operating costs , administrative cost  and nonproductive cost. In this study were evaluate: two (02) hydraulic excavators (New Holland E215, Caterpillar 320-C), two (02) wheel loaders (Volvo L60F, Caterpillar 924G) and three (03) motor graders (New Holland RG170B, Caterpilllar 140M, Volvo 940G). The idea of using the equipment cost is very useful for machinery rental companies so that they can define rental price and also for construction companies to monitor the monthly cost of each unit, assessing their productivity and viability for the company. As a result, is possible to conclude that the hydraulic excavator 320C and the E215B had the same result, due to high number of hours worked in the moth. The New Holland motor grader had a better result in comparison with motor grader obtained the lowest cost and the Caterpillar wheel loader obtained de lowest cost. It is important to say that the age and the worked hours of equipment interfere directly in the results.

Replacement problems of deteriorating systems have been extensively studied. Typically, the time between failures is characterized by lifetime distribution in which the parameters are estimated from historical data. On the other hand, in most cases, the work focuses on determining the optimal replacement schedule by assuming that model parameters are constant. Here, the issues arising from the use of estimated parameters are studied and the results are applied to opportunistic replacement. Also, a graphical approach is proposed to obtain the confidence limits for the optimal replacement time, considering the key parameters of the two popular replacement models, namely, the age replacement model and the block replacement model. The applications of the proposed confidence interval are presented, namely, determination of the window of opportunity for minimum cost, maintenance scheduling given erratic customer demand, and opportunistic maintenance for multi-component systems.

The end result of a product is accepted by the consumer, sold and sold. One way for the product to be accepted by the consumer is an attractive appearance that is by painting. in large-scale production of painting process with semi automatic and even automatic equipment. Painting line is a set of painting appliances that operate automatically. To be optimally required periodic maintenance. In this study calculated RCM (Reabilty Cost Maintenance) of unscheduled care with the scheduled. Preparation of preventive maintenance schedule based on RCM assessment on the painting line machine can increase the value of MTBF (Mean Time Between Failures) so as to increase reliability, reduce defective product by 75%, save the cost of Rp 15,616,224,000 per year, reduce the time to repair up to 95% so that machine can operate optimally and help improve company productivity.

This paper would narrate and analyse about the case study of Alaska Airline Flight 261 crashed disaster in year 2000. The case study shows how the impact of the current economic situation in 1990’s forced the Alaska Airline top management making decision to changed many of their policies as before that can consider as unacceptable. The management decision, no safety procedure, and engineering aspects elements (maintenance and design) contributed to the root causes of the Alaska Airline 261 crashed. The writer will start the introduction chapter by explain the topic that have been selected generally and summarize the objective for the second chapter Case Study: Alaska Airline 261 Crashed. In the second chapter, discussion will be more to understand the case study deeply. It starts with introduction to the case which a short brief about the history of the aircraft crashed and also the short explanation about the failure of the horizontal stabilizer trim system that caused the Alaska Airline Flight 216 had crashed. Then, writer will narrate the background of the tragedy in summary based on the Cockpit Voice Recorder database (CVR Database), the conversation between the Alaska Airline Flight 261 pilots with the people had contacted by them. It will make the illustration of how serious the situation and both of the pilots struggled to save the aircraft, all crew members and passengers until the end of this even where this aircraft involved in crashed disaster. For next, this paper explained about the investigation done by National Transportation Safety Board (NTSB) after the crashed, what they had found, followed by recommendation for the jackscrew assembly design that not have fail-safe feature. Based on the investigation section briefing, writer then analyse the causes of the Alaska Airline Flight 261 that brings the aircraft into the worse disaster with all died in the crashed. Then, with using the cause’s analysis, Fault Tree Diagram (FTA), Reliability Block Diagram (RBD), Failure Mode and Effect Analysis will develop and discussed about the strength and limitation each of the concept/tool. Lastly, discussion and conclusion will discuss overall in the last chapter.

Abstract - Activity based costing (ABC) is a method for determining true costs; which has
become an important aspect of manufacturing/service organizations and can be defined as a
methodology that measures the cost and performance of activities, resources and cost objects.
It can be considered as an alternative method to traditional cost accounting systems. In this
paper we have shown a comparative analysis of application of ABC method with traditional cost
accounting (TCA) method in an automobile parts manufacturing company; which would like to
increase the sales due to increased demand. For this reason the company needs to know the
true cost of the parts prior to deciding as which item is to be produced more.

Vibration Analysis should present 50% of any condition monitoring program. This book include a practical guide to vibration analysis to prepare practitioners for levels I II & III to become certified analyst. Numerous examples with photos are included to present how to detect different types of equipment failure: bearing, shafts misalignment, unbalance, rotor problems, electric motors and more using spectrum analysis technique.

Reliability centered maintenance (RCM) has a key role in the quality system of thermal power plants. Electricity production is definitely not only production of a product, but also becomes a customer service. Reliability is the top quality tier of this service. Incorporation in the Integrated energy system means fast transformations of organization on all levels. The reliability of modern generation components basically influences the efficiency and capacity of a power plant as a whole. This paper presents the results of RCM practice on Unit Two of The Thermal Power Plant ″Nikola Tesla -B″, 2x600 MW, Yugoslavia. RCM implementation on current problems during exploitation emphasized problems with the boiler tubing system. The methodological approach included outages analyses, marking of the most significant ones, determination of main causes of damage (determination of the material exhaustion state based on expert analyses), application of adequate remaining life assessment methodology and finally the recommendations. Based on these analyses, certain technical solutions were performed and as a result, the mean time between failures of the plant increased, as well as its reliability. According to cost efficiency, RCM methodology presented the most effective cost-benefit method for reliability upgrade.

El objetivo de la presente investigación experimental es evidenciar las pérdidas de energías que se producen en los conductores eléctricos de los sectores industrial, comercial y residencial, y que generan un impacto económico. A través de la observación , deducción y verificación, se hizo una comparación de la pérdida de energía debido al efecto Joule por el paso de una corriente eléctrica en los conductores, con la pérdida de potencia real en un circuito en donde se modificó el calibre del conductor bajo una fuente electromotriz constante para obtener una serie de ecuaciones, capaces de estimar las pérdidas energéticas de una instalación eléctrica industrial o domiciliar a través de las mediciones de temperatura mediante el uso de la termografía infrarroja por ser un método de medición eficaz y que a la vez permite detectar otros problemas en las instalaciones eléctricas. Como se esperaba al disminuir la sección o al aumentar la longitud del conductor, se incrementó las pérdidas de energía; sin embargo, los valores obtenidos mediante medición directa fueron mayores a los predichos por el efecto de la resistividad.

Type feasibility through preliminary design for minimum available data.
Adequate to start detailed design stage.


Elements of Electrical Power Station Design M.V. Deshpande.
------------------------------------------------------------------------------------------------------------------------------------------
At a site for hydro-electric power project, a flow of 90m^3/s is available at a head of
100m. Sufficient storage is available. A hydro-electric power plant is to be chosen for
the project.

Load factor of power system supplied by the station 80%.
Cost of the hydro development $1500 per kW installed.
Fixed cost 9%.
Operation and maintenance cost $7 per kW per yr.
Load centre is 80km from power station.
Transmission line voltage to load centre 110kV.
Transmission liability $20 per kW per yr.
Energy used in generating stations for auxiliaries 2%.
Efficiency of turbines 89.5%.
Efficiency of generators 95.
Q  = 90 m^3/s discharge rate.
w  = 1000 kg/m^3 density of water.
nt = 0.895 efficiency of turbine(s).
h  = 100 m head.

This study established factors affecting port infrastructure asset maintenance management at the port of Dar es Salaam. The specific objectives of the study are to, identify current infrastructure maintenance management practices of the ports authority in Tanzania, identify factors that affect the infrastructure asset maintenance management at the port of Dar es Salaam, establish the strategies to drive improvement in ports infrastructure asset maintenance management in Tanzania. The data was collected using questionnaires and document review.Questionnaires were distributed to managers, engineers, and technicians involved in maintenance activities at the Port of Dar es Salaam. Statistical package for social science (SPSS) software version 20 was used for analysis. This study also provided the strategies for
the improvement of infrastructure asset maintenance management. The study established that port maintenance management is affected by factors categorized into management issues, human resources issues, technical issues, and others. It was established that, maintenance policy and strategy, resource planning, financial issues, difficulty in the procurement of spare parts, inflation of the cost of maintenance by the operatives, data recording, storage and management, and absence of planned maintenance programs. Human resources factors include qualification of maintenance personnel, the attitude of maintenance personnel towards maintenance work, motivation of human resources towards maintenance, wages of maintenance personnel, human error in maintenance, inadequate training, and development of personnel. There was no technical factor presented which had an effect at the port. Other factors such as lack of maintenance culture, lack of successful maintenance programs by the maintenance department, natural deterioration due to age and environment, complexity of design and non-involvement of maintenance experts during the design stage, aging infrastructures, the higher utilization rate of infrastructures were established. The strategies found to have effect at the port of Dar es Salaam were established to include, proper maintenance management including effective policy, strategy, planning, and execution, improvement of data management facilities, the establishment of training programs to the key staff, personnel responsible should have enough knowledge on maintenance activities, advanced technology should be adapted, regular inspection of the facilities, aged infrastructures should be replaced.

This report deals mainly with maintenance of agricultural machinery in the Ho Municipality. The report emphasizes the tractor, because it is the major tool for agricultural mechanization in the Ho Municipality.
The report aims to identify the present status of agricultural machinery maintenance within the Municipality, the problems faced by tractor owners and operators when they undertake maintenance and the new approaches to agricultural machinery maintenance in the Ho Municipality. A survey of 50 tractor owners and operators in the Ho Municipality was conducted to identify their personal profile, their perception about the causes of tractor breakdown, and the major constraints affecting tractor maintenance and repair in the Municipality. Data was collected using questionnaires and this was administered to respondents who were the tractor owners and operators in the Ho Municipality. The data collected yielded some of the following results; farming in the Ho Municipality was male dominated, the most recurring age of the respondents was 25-40 years old, educational level of the respondents was above average. Also, tractor owners and operators perceived the causes of tractor breakdown to be careless tractor operation, inadequate maintenance, aged tractors, poor roads to farms, use of fake spare parts for tractor maintenance and repair, and obstacles to tractor operation in the farms including stumps, roots, and buried stones. Checking of water level in the radiator, checking the engine oil level, tightening of bolts and nuts, checking tire pressure, changing of engine oil, changing of oil and fuel filters, changing of worn out parts of the tractor and general overhauling at the end of the year was identified to be some of the maintenance schedule followed the tractor owners and operators. The major constraints affecting tractor maintenance and repair were found to be high cost of genuine spare parts, and lack of financial credit. The study draws attention to the need for the provision of financial credit, subsidized genuine spare parts and quality after-sales-service to tractor owners and operators as a recommendation.

Ensembles minimaux de composants dont la défaillance entraîne la panne du système Coupes minimales classées par ordre d'importance Coupes critiques  PRESENTATION DE LA METHODE ADD  Méthode ADD : inventée par WATSON en 1962 dans Les laboratoires de la « Bell Telephone Company » 1965 : établissement des règles de base pour la construction des ADD par HASL 1970 : présentation par FUSSELL et VESELY d'un outil d'évaluation quantitative des ADD et de détermination des coupes minimales Méthode ADD = Technique purement déductive : elle part des conséquences d'un événement indésirable pour aboutir à ses causes initiatrices

This work concerns the study of the multicriteria and multiobjective aspects related to the industrial management. This is why it was an obligation, at the first stage of the study, to define the sub-domains by which we are interested, the “maintenance management”, the “production management” and the “quality control”. For that, it was necessary to specify the level of analysis that will guide the corresponding developments. Hence, related to the organizational aspect, we have adopted the Holonic paradigm in order to model and describe formally some specific analysis procedures that are utilized in the studied domains. Briefly theses procedures correspond to the FMEAC analysis, the SPC (quality control) and the machines parameters optimization, using the Design Of Experiments (by Taguchi method). The results of the developments correspond to the establishment of the UML 2.0 Class and Sequence diagrams of the described procedures. After that, we have formulated the relation between the degradation of the equipment of production and the production rate of this latter. Indeed, the method proposed is based on the unification of the decision variables of these two important characteristics of the production equipments (machine degradation and production rate).
Finally, related to the operational aspect, the multiobjective analysis was performed by its application on a large known production problem. So, we have adopted the analytical way to resolve the multiobjective optimization problem of the sigle-pass turning operation, in order to determine the feasible and optimal solutions of the problem according to the rigorous mathematical optimization tools. In consequence, the resolution approach permits to detect several feasible solutions, but finally, converge to a unique and global optima that is competitive according to the metaheuristics which are largely used in the bibliography.

Maintenance is an important part of any organization and it has a significant impact over management operations. After over years of research and practical implications, maintenance has been recognized as a strategic problem of a company. In order to solve the strategic problem, researchers have identified the key performance indicators to measure the effectiveness of maintenance management for better output of an organization. However, there are still more to find when it comes to performance measures, this study is analysing the new variable of Quality Function Deployment as a key performance indicator along with other variables.

The primary objective of this study to analyse inventory management, planning & scheduling, preventive maintenance and the moderating role of quality function deployment as a key performance indicator for the effectiveness of maintenance management. To achieve the objective, a purposive based descriptive cross-sectional study was selected to collect the primary data through structured questionnaires from professionals of maintenance background and experience within Pakistan.

Results of this study suggest that there is a positive relationship of inventory management, planning & scheduling, preventive maintenance on the effectiveness of maintenance management while quality function deployment moderates the relationship in the positive direction between
preventive maintenance and effectiveness of maintenance management. Although the relationship is positive within the research philosophy, in-depth analysis, and further research is required in this domain. A practical approach is important to understand Quality Function Deployment as a key performance indicator.