Technical Characteristics Of Products Research Articles

Analysis of Determinant Factors Customer Loyalty Towards Brand in The Telecommunication Industry With The Digitalization Paradigm

The goal of this research is to determine whether company parties have implemented engagement strategies in the current digital context. This research uses a qualitative marketing research approach. We used a digital platform for the initial data collection stage. The analysis then continued with the creation of a textual corpus. A deep understanding of consumer engagement with brands can help companies build stronger relationships with consumers, create greater value for brands, and maintain a competitive advantage in the marketplace. By paying attention to emotional, cognitive, and behavioral dimensions, companies can develop more holistic and effective strategies for managing consumer engagement and strengthening their brand positioning. Research results reveal that consumers actively seek knowledge and information to enhance their decision-making about brands and products. Mobile telecoms have well-implemented Customer Brand Engagement strategies, but they also need to have a proactive approach in dialogue with customers to maintain their engagement. This means that in addition to understanding and responding to consumer needs and desires, companies also need to be proactive in communicating with customers to strengthen their relationship and engagement with the brand. According to a careful analysis of the lexical units in cluster one, the majority come from Twitter. Cluster two highlights the comparisons that consumers make regarding the technical characteristics of products and services with those of various competitors. Meanwhile, cluster three shows that consumers are increasingly looking for personal services that can meet their needs. Cluster four warns management about loss phenomena that are specific to certain areas or regions. Finally, Cluster Five allows management to understand that consumers are currently less involved in innovative services such as payments via smartphone.

OBTAINING THE NECESSARY MECHANICAL PROPERTIES OF BLANKS OF PARTS MADE OF ALUMINUM ALLOY 7075 BY PHYSICAL MODELING

The article considers physical modeling for aluminum alloy 7075, widely used in mechanical engineering, in particular for elements of aircraft structures. This alloy differs from other rolled aluminum-based alloys not only by high values of strength properties, but also by the presence of a large number of intermetallic compounds of alloying elements. The workpiece for the parts is a round rolled product with regulated mechanical properties. Thus, the purpose of this work was to determine the effect of the deformation pattern that occurs in metal during bar rolling on the mechanical properties of blanks of parts made of aluminum alloy 7075. The present study draws attention to the importance of physical modeling in determining the characteristics of materials necessary for effective management of plastic processing processes. Analyzing the results of physical modeling, we identify the optimal parameters of material processing, such as microstructure, mechanical properties and chemical composition. The results obtained allow a deeper understanding of the physical mechanisms underlying the production of blanks (rods) from aluminum rods of alloy 7075 by rolling, as well as optimizing it to achieve the required technical characteristics of products. Thus, as a result of physical modeling of the rolling process of bars made of aluminum alloy 7075, it was found that when the samples are deformed at a temperature of 250 ° C, the value of the plasticizing stress decreases by about 18%, and a more uniform distribution of microhardness over the transverse and longitudinal sections was obtained compared with deformation at a temperature of 200 °C. The research is of practical importance for the metalworking industry, and can also be used for educational purposes to train specialists in the field of materials science and metalworking. Keywords: workpiece parts, physical modeling, aluminum alloy 7075, metalworking, aluminum alloy microstructure, deformation of samples.

THE QUALITY OF EXPENDITURES FOR THE PRODUCTION OF CROP PRODUCTS AND ITS IMPACT ON CONSTRUCTION ACCOUNTING

In Ukraine, in recent years, there has been a tendency to expand the market of organic crop production, which is one of the main directions of the formation of the domestic economy. Organic crop production is a production management system, the main goal of which is to grow ecological and safe products without harming the natural environment. The specifics of the industry affect quality management in the part of production. In this regard, it was established that the most significant items of expenditure require detailing in order to control the objectivity of cost formation and establish a reasonable price for organic crop production. The article describes trends in the development of organic production of plant products, analyzes the state of the organic market in Ukraine compared to the leading countries of the world. Approaches to the interpretation of the economic essence of quality costs were studied and it was proposed to consider them as a set of preventive measures to ensure and improve the technical characteristics of products in order to increase the volume of sales on the market. It is proposed to detail the quality costs of production (seeds, fertilizers, fuel, labor wages, shortages in production) on sub-accounts of the second and third levels of accounting. In addition, we consider it expedient to single out not only the costs of production, but also the quality of organic crop production in terms of the implementation of control measures; confirmation and improvement; sale of products; conducting research and development. It was determined that these implementations will contribute not only to meeting the informational needs of users, compliance with the technological process of production, but also to optimizing costs to establish a justified price in order to increase the consumption of products in the domestic and foreign markets.

CONTACT INTERACTION OF DISCRETE-CONTINUALLY STRENGTHENED PARTS OF INTERNAL COMBUSTION ENGINES

Studies of the stress-strain state of discrete-continuously strengthening parts of internal combustion engines are described in the paper. A parametric model of a microcell containing a two-part cell has been developed. The first part simulates a fragment of an aluminum part with a surface corundum layer. The second part is a fragment of a cast iron part with a zone of discrete strengthening of steel. Vary: modulus of elasticity of the corundum layer material and the shape of the discrete hardening zone. The dependences of the strength and stiffness characteristics of the studied system on the varied parameters are established. They are the basis for substantiation of rational modes of technology of discrete-continuous strengthening of parts of internal combustion engines.
 In the course of research, it was found that previously determined for discrete strengthening, the effects of a favourable redistribution of contact interaction between parts are preserved for discrete-continuous strengthening. The characteristic dependences of the features of the stress-strain state of the elements of discrete-continuously strengthening parts on the varied properties of the surface layers of the continuously strengthened part, on the one hand, and the shape of the discrete strengthening zone, on the other, are determined. This makes it possible to determine the sensitivity of the characteristics to purposeful or random variation of these factors. It is also expedient to set and solve optimization problems to determine such modes of technological operation of discrete-continuous strengthening, which increase the characteristics of strength, durability, efficiency of internal combustion engines and other machines, units and assemblies containing such strengthened parts.
 The developed approach, models and research methods will be further applied to studies of the stress-strain state of contacting discrete-continuously strengthened parts of structures to improve the technical and tactical and technical characteristics of products of machine-building enterprises.

Uncovering causes of stagnating product sales of a healthy snack: A system dynamics group model building project in a food processing company

Product life cycle (PLC) analysis studies patterns of sales over time and the reasons behind those patterns. Such analysis can be challenging because of the interconnected effect of technical product characteristics, marketing mix elements, and the environment (e.g. competition, consumers). Moreover, employees from different functions have different backgrounds and perceptions about the origins of patterns, which constrains mutual understanding and hampers decision-making. The group model building (GMB) approach can be an effective method to support teams in solving complex dynamic problems, such as a PLC analysis of product sales. This study uses a GMB approach and presents a system dynamics model, which supported cross-functional collaboration in analysing causes of stagnating product sales in the PLC of a healthy snack product in a food processing company. Through multiple GMB sessions with the company team, a system dynamics model was developed, and several strategies were analysed. The model has proven useful in explaining the reasons behind the sales stagnation and in studying possible interventions. Moreover, GMB was successful in increasing participants’ insight into the causes of the problem, improving communication, and creating a shared vision about the problem.

A design of the quality control and safety mechanism for convenience meat products

The main aim of any company is consumer satisfaction. However, in order to promote a new product on a market, an analysis of consumer preferences is not enough, you must make sure that the product meets all safety requirements for this category of the product and guarantee its sustained quality. So, the producer has to create products according to consumer wishes. In this article a study of market of convenience meat products is established. The result of forms was drawn and a list of wishes of “active” consumers was provided for convenience chilled meat cutlets. Then, we used the Quality Function Deployment method, the mechanism for designing products or processes, and, based on the established and expected consumer demand, consistently transformed this demand first into technical characteristics of products, raw materials, and then into parameters of the technological process. This demand is transformed into chain of House of Quality. The final step was to develop a consumer demand target matrix. Scientists Vahouni G. V., Ross H. have studied the application of QFD in production in various industries [3,4].

Installation of screw reduction UVO 20-50 for hardening and calibration of cylindrical parts and billets of agricultural machinery

A screw reduction unit UVO 20-50 (diameter of hardened products from 20 mm to 55 mm) with a closed cooling system for hardened rolled products with the ability to integrate equipment into a production line for manufacturing parts was developed. The UVO unit is intended for shaping and hardening of cylindrical parts by high-temperature thermomechanical treatment (HTMT) with metal deformation by screw compression (VO), ensuring the technical characteristics of products. It is known that some thermomechanical methods of hardening and production of rolled products, for example, steels HTMT, in comparison with conventional types of hardening heat treatment, provide a set of higher properties: strength, ductility and fracture resistance. Evaluating the efficiency of using the hardening thermomechanical treatment of long products for highly loaded parts, it is necessary to use the criteria of fracture mechanics, to study the resistance to brittle and cyclic fracture of steel under the action of stress concentrators, negative temperatures and other difficult test and operating conditions. Taking into account the increased properties of steels with HTMT, it becomes possible to use hollow sections instead of solid billets. The investigated materials and the revealed patterns allow authors to conclude that thick-walled hollow parts, which are used to save metal and lighten the weight of structures, should be considered not only as full-fledged substitutes for solid ones, but also as having an advantage over the latter, mainly due to their better hardenability at surface cold working and less sensitivity to stress concentration at cyclic loads, which makes them more reliable in operation. These research results substantiate the wider use of hollow profiles for such parts of agricultural machinery as track pins, shafts, axles, torsion bars and other parts for various purposes.

Italian Health Care Workers’ Knowledge, Attitudes, and Practices Regarding Human Papillomavirus Infection and Prevention

Objective: To assess healthcare workers’ knowledge and attitudes about human papillomavirus (HPV) infection, related diseases, and prevention. Methods: A cross-sectional multicenter survey about HPV and its prevention, targeted to healthcare workers involved in HPV vaccine counseling, was performed from May 2017 to December 2018. Results: The overall median knowledge and attitude scores were 69.2% (25–75, p = 61.5–84.6) and 5 (25–75, p = 4–5), respectively. Both knowledge and attitudes statistically significantly differ between physicians and healthcare professions. The median propensity score before and after the educational intervention was stable and high, at 10 (25–75, p = 9–10). The predictors of statistically significantly high knowledge scores are to be a physician, general practitioner, or pediatrician, attending courses/congresses, and consulting technical product characteristics and scientific literature to obtain information about the HPV vaccine. Being a physician and consulting scientific literature to obtain information about the HPV vaccine were found also as predictors of statistically significantly different attitude scores among study participants. Conclusions: Although healthcare workers showed overall positive attitudes towards the relevance of HPV burden and prevention tools, demonstrated knowledge was largely suboptimal, particularly that shown by healthcare professions. Obtained results allow highlighting knowledge gaps, and thus improving counselling to HPV vaccine targets.

The Influence of Temperature Testing on the Technical Data of Cementing Technology

The problematic issues connected with the optical details deformations that arise during the temperature tests of cemented assemblies are considered. Climatic tests of optical devices after assembly result in a change of technical product characteristics. The research problem is to define how N and ∆N of surfaces of cemented optical assemblies are changing after the temperature testing. The research objects are plane convex lenses fabricated of LK7 (LZOS) glass brand and plane concave lenses - of TF7 (LZOS). Before cementing, the bounded surfaces cleaning by the hydromechanical method in the clean room has been purged. The temperature testing of samples is held at 22, 50 and 65 °C. The effect of temperature on a surface deformation of cemented optical assemblies is experimentally established. The comparison of effect of optical cements OK72FT5 and OK72FT15 on the optical surfaces deformation is carried out. In this paper we have compared the results of shape accuracy of the external surfaces of optical assemblies and the flat surfaces. Interferograms of lenses after heat treatment of optical assemblies are presented. It is determined that the cement polymerization temperature equals or higher than the test temperature.

Quality Label in Buildings and Construction – a Green Label Supporting the Sustainability of Buildings in Slovenia

Sustainable actions in the building sector need to be supported by appropriate quality assurance (QA) and control protocols and tools. In late 1990s the first – and to this date the only comprehensive – quality label for construction products and services was established in Slovenia: the Quality Label in Buildings and Construction (ZKG). It is a voluntary green label addressing not only the specific technical characteristics of products and services, but among other also the production process quality, internal QA schemes, regular training and education of staff, innovation and development activities, economic aspects, the impact of the activities on the environment, and the social role of the company in the local area. In this way it addresses the three core pillars of sustainability. The label has gained a prominent status and is being referred to in calls for tenders both in public and private sectors and in national subsidy schemes. The paper presents the structure and content of the assessment scheme and ranking system exposing their core elements. A more detailed approach is presented on the case of a window as a construction product and on the case of installation of windows as a service, underlining the positive role of the label with regard to raising the quality standards in the building sector on the national level.

ОСОБЛИВОСТІ ТЕРМОІМПУЛЬСНОГО ОЧИЩЕННЯ ПОВЕРХОНЬ І КРОМОК ДЕТАЛЕЙ ВІД ЗАБРУДНЕНЬ ПІСЛЯ МЕХАНІЧНОЇ ОБРОБКИ

The requirements for the quality of aviation technology are decisive in the creation of technological systems that ensure the industrial purity of products. But the cost component of the finishing and stripping technologies is also important, the value of which depends on the chosen method of removing liquids, for example, from hydraulic units of aircraft. Reliable and cost-effective manufacture of parts with specific geometric and technological properties is the main goal of industrial production. In a market economy, the production of competitive products is a necessity, and it is always the choice of a rational, stable price-quality ratio. The quality of engineering products is a multifactorial problem, depending on the complex of systemic organizational and technological measures. In the production of aircraft technology, quality assurance is associated with dependability and a guaranteed resource that is vital due to specific operating conditions. One of the most important measures to ensure the reliability and guaranteed life of aviation products is to ensure industrial cleanliness. Cleaning from microparticles, macro- and micro-hauler surfaces and edges of parts after mechanical types of processing is included in the complex of these measures. The most problematic is the cleaning of body parts with a complex configuration of external and internal surfaces. The need to remove liquids and other technological pollution is explained by functional, ergonomic and aesthetic reasons. If ergonomic and aesthetic factors do not affect the technical characteristics of products, then the functional ones are directly related to the operability of machines and mechanisms. Functional causes are the prevention of failures of hydraulic distribution and control devices, as well as the prevention of increased wear of critical parts occurring when friction pairs of solid metal particles enter the gaps, difficulties in assembling and positioning, reducing fatigue strength and so on. Burrs cause turbulence in the flow of gas or liquid, disrupting the flow uniformity. It is obvious that the mutually influencing processes occurring in the hydraulic systems of machines, in violation of working conditions, lead to an increase in negative phenomena. The peculiarity of the use of purification technologies is the need to remove liquids from 100% of the parts included in the autonomous system of mechanisms. If at least one detail is left untreated, then the working fluid, when in contact with contaminated surfaces, washes away these contaminants and spreads them throughout the system, while the most sensitive elements are damaged. The reasons for the need to clean the surface and edges of parts from technological contamination are given. A brief review of the results of modeling and research on the removal of burrs in the environment of detonating gas mixtures has been performed. The features of the thermopulse process are considered and the results of numerical and experimental studies are presented. A comparative analysis of the energy intensity of removing burrs of various metals is shown.

Development Overview of a Smart Customizable Product

Abstract This paper presents the development phases of a smart product that can be manufactured on a cyber physical production system. The intelligent product’s requirements are defined from the manufacturing perspective and then converted into technical product characteristics. Finally, we refined the technical characteristics to create a functional tablet with customizable hardware functionalities as a customizable product.

Instruments of Marketing and Credit Support of the Large Industrial Enterprises Development: International Experience

Introduction The strategic goal of the state Russian Federation's policy the environmental development is the solution of social and economic problems providing ecologically oriented economic growth, preservation of favourable environment, biological diversity and natural resources to meet the needs of present and future generations, to exercise each person's right for favourable environment, to strengthen law and order environment protection and ensure ecological safety (Principles of State Policy Environmental Development of the Russian Federation for the Period up to 2030; Dmitrishina and Uskov, 2015). The authors opine that the achievement of objectives ecological safety is possible only through science-based technical, economic and social compromises the process of human economic activities, especially at the stage of of new products. The main criteria for ecological performance of such decisions are saving the material and energy resources at the input and minimizing the negative environmental impact at the output of production systems. At present, the scientific concepts ensuring ecological safety are: the concept of control in the end of the tube, the concept of cleaner production, the concept of design for ecology and the concept of ecosystem approach. The implementation of the most modern concepts of design for ecology and ecosystem requires making all technical decisions from a position of full responsibility for ecological safety of products being created their life cycle. The main disadvantage of the traditional system of ecological reasoning and choosing alternatives the course of development of engineering systems is the lag of systematic analysis and comprehensive assessment of ecological safety behind the core technical decisions making. It is most efficient to do the analysis and comprehensive assessment of ecological safety at earlier stages as the decisions determining the necessary material base for the creation of products and having multiplicative effect of impact on abiotic resources are made addition. Improving ecological safety of products can be achieved by improving the theory and methods for assessing competitive variants according to ecological criteria (Burkov et al., 2002; Medvedeva et al., 2015; 2016). The assessment should be done on the basis of the analysis of implicative relations of functional and other technical characteristics of products and dependent ecological factors of negative effect using private and comprehensive ecological criteria to optimize and rationalize the solutions choosing competitive alternatives. Such an approach will enable to control ecological performance indicators of project works and ecological safety of products and to reduce the intensity of environmental problems before they occur. According to GOST R 14004-2007, this work under ecological performance we understand the results of control measured by the organization through the ecological aspects (Theriou and Aggelidis, 2014; Thalassinos and Liapis 2014). Methods There are several directions to improve ecological performance of processes accounting for the product life cycle. The offered methods were developed for of technical products (TP). I. Assessment of TP criteria for subsequent recycling at the stage The criteria used the algorithms to improve ecological safety of designed products can be both quantitative and qualitative ones. For example, the quantitative criteria characterizing the possibilities for subsequent recycling should determine the efficiency of this process. The efficiency of the recycling process depends on the following conditions: --small dismantling of TP which is important the process of products recycling general; --increase the number of unified assemblies which is important recycling of parts and assemblies; --reduction the number of used material brands and number of composite materials products, which is important recycling of construction materials. …

Improving Ecological Performance of Design Processes Accounting for Product Life Cycle

Introduction The strategic goal of the state Russian Federation's policy in the environmental development is the solution of social and economic problems providing ecologically oriented economic growth, preservation of favourable environment, biological diversity and natural resources to meet the needs of present and future generations, to exercise each person's right for favourable environment, to strengthen law and order in environment protection and ensure ecological safety (Principles of State Policy in Environmental Development of the Russian Federation for the Period up to 2030; Dmitrishina and Uskov, 2015). The authors opine that the achievement of objectives in ecological safety is possible only through science-based technical, economic and social compromises in the process of human economic activities, especially at the stage of design of new products. The main criteria for ecological performance of such decisions are saving the material and energy resources at the input and minimizing the negative environmental impact at the output of production systems. At present, the scientific concepts in ensuring ecological safety are: the concept of control "in the end of the tube", the concept of "cleaner production", the concept of "design for ecology" and the concept of "comprehensive ecosystem approach". The implementation of the most modern concepts of "design for ecology" and "comprehensive ecosystem approach" requires making all technical decisions from a position of full responsibility for ecological safety of products being created in their life cycle. The main disadvantage of the traditional system of ecological reasoning and choosing alternatives in the course of development of engineering systems is the lag of systematic analysis and comprehensive assessment of ecological safety behind the core technical decisions making. It is most efficient to do the analysis and comprehensive assessment of ecological safety at earlier design stages as the decisions determining the necessary material base for the creation of products and having multiplicative effect of impact on abiotic resources are made in addition. Improving ecological safety of products can be achieved by improving the theory and methods for assessing competitive variants according to ecological criteria (Burkov et al., 2002; Medvedeva et al., 2015; 2016). The assessment should be done on the basis of the analysis of implicative relations of functional and other technical characteristics of products and dependent ecological factors of negative effect using private and comprehensive ecological criteria to optimize and rationalize the solutions in choosing competitive alternatives. Such an approach will enable to control ecological performance indicators of project works and ecological safety of products and to reduce the intensity of environmental problems before they occur. According to GOST R 14004-2007, in this work under ecological performance we understand the results of control measured by the organization through the ecological aspects (Theriou and Aggelidis, 2014; Thalassinos and Liapis 2014). Methods There are several directions to improve ecological performance of design processes accounting for the product life cycle. The offered methods were developed for design of technical products (TP). I. Assessment of TP criteria for subsequent recycling at the design stage The criteria used in the algorithms to improve ecological safety of designed products can be both quantitative and qualitative ones. For example, the quantitative criteria characterizing the possibilities for subsequent recycling should determine the efficiency of this process. The efficiency of the recycling process depends on the following conditions: --small dismantling of TP which is important in the process of products recycling in general; --increase in the number of unified assemblies which is important in recycling of parts and assemblies; --reduction in the number of used material brands and number of composite materials in products, which is important in recycling of construction materials. …

Identification of the technical product characteristics of process scoping studies

The analysis of methods for converting customer requirements into optimal technical characteristics of the product was made, a conclusion was made about the applicability of the methodology for the deployment of quality functions. Deficiencies in methodology have been identified and a decision has been made about the need to apply the principles of the method of analyzing hierarchies and expert assessments within the methodology of the deployment of quality functions. Presented organizational-methodical provision of the process for identifying the technical product characteristics for the purpose of optimization of process scoping studies. The technique of identification of technical characteristics of a product is offered. Expert groups were identified in the context of the processes stages of identifying technical characteristics of the product, principles for the formation of priority matrices were recognized. Reviewed the application of techniques based decision support system with three-level data store.

Blade Runner Economics: Will Innovation Lead the Economic Recovery?

Schumpeterian economics has for long associated phases of economic expansion to the introduction in the economic and social fabric of successful innovations. On the contrary, economic depressions have often been explained as the inability, or the lack of availability, of innovations. Can the economic crisis started in 2008 be explained as an inability to introduce innovations in the economic system? And, conversely, will a new stream of innovation be lead an economic recovery? These issues are not new: after the economic crisis of the 1970s, it was repeatedly asked which innovations could lead a new development phase. In the early 1980s, contrasting views where discussed at the Science Policy Research Unit of the Sussex University: Christopher Freeman was leading those who believed that only revolutionary changes in the economic structure could lead to a long-term recovery, while Keith Pavitt stressed the importance of accumulated skills and competences to sustain economic life.These hypotheses were tested against some of the emerging technologies of the period: nuclear energy, bio-technology and ICTs were scrutinised to assess their potential impact in terms of employment generation. After thirty years, it can be said that nuclear energy and bio-technology have not delivered (yet?) their promises, while ICTs have become much more important than expected. In particular, they have managed, as predicted by Freeman, not only to generate a successful new industry, but also to change the operation of all other industries.These predictions were the result of an explicit model about when and how new technologies can become the driving force of economic and social development. What can does the model tell about the reality of the XXI century?The paper presents an attempt to identify what could be the driving technologies of the next economic wave on the ground of: 1) Cost reductions in a wide range of products and services; 2) Improvement of the technical characteristics of products and services; 3) Social and political acceptability; 4) Environmental acceptability; 5) Pervasiveness in the overall economic system; 6) Emergence of new companies, often also with a distinctive managerial organization.

MOŽNOSTI DISTRIBUCE VÍNA DROBNÉHO VINAŘE KE KONEČNÉMU SPOTŘEBITELI

Distribution can be defined as a way of goods from producer to consumer. In wine production industry there exist several distribution channels, through which wine is distributed to the final consumer. Aim of this paper is to identify and compare advantages and disadvantages of particular distribution channels for wine sales related to a small wine-producer.Distribution of wine to the final consumer is done through dealers represented by retail chains, specialized wine-shops, hotels, and restaurants. In a smaller scale it is done through internet sales, own outlets and wine auctions. According to the research of Focus agency, Marketing & Social Research, done in 2009, customers buy wine mostly in retail chains and decide on sort and quality of wine directly at the moment of purchase. Selection is based except wine quality also on the shape of the bottle, etiquette, and also cork (consumers explicitly prefer cork, and the screw top rather discourages). Certain part of customers – specifically those, who are more acquainted with wine – buy wine in special wine-shops. The research shows a decrease of direct wine-sales.When using services of independent trade organizations, producers have to control the intensity of commercial activities and knowledge of technical characteristics of products. Small wine producers, though, do not have to use this distribution channel, and can focus only on direct sales. For some small wine producers, specifically those operating in the areas with an extended possibility for wine-tourism, this channel can be more suitable and effective than using retail chains. This way of distribution does not require extensive start-up investments, it is directly dependent on producers own effort, and can be done as a supplementary activity to the main source of income.Regardless the particular choice of a distribution channel by a small wine producer it is necessary to be judged not only from the viewpoint of its advantages and disadvantages, but also by a detailed analy­sis of costs of sales.

Two-stage procedure of estimation of reliability indexes from forced and service tests

Prolonged experiments are needed to control the reliability of modern technical products. One method of their shortening is the use of tests under forced regimes. To interpret the results of forced tests with regard to normal conditions the relationship between reliability indexes (RI) and test regime is used. This relationship is determined from preliminary tests. In this approach the above mentioned relationship between RI and test regime is assumed to be valid for all batches of products. It is noted in [1] that the technical characteristics of products are random variables whose distributions depend on production conditions. Therefore for different batches RI may vary rather widely under the same conditions. In the present paper the model of dependence of RI on some inner product parameters instead of those of the testing regime is used to find the common relationship for different products.