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4 Qualimetry

The assessment of a level of quality of object and classification of indicators of quality are considered in a Qualimetry.

Qualimetry (from armor. qualitas - what on quality and … a metriya) - the branch of science studying and realizing methods of a quantitative assessment of quality.

Main objectives of a Qualimetry: justification of indicators of quality, development of methods of their definition, calculation and optimization, improvement of standard sizes and parametrical ranks of products, development of the generalized indicators and justification of conditions of their use in problems of standardization and quality management. Any goods and services to which the concept "quality" is applicable can be objects of a Qualimetry. It can be production and service of the industry, agriculture, etc.

Starting position of a Qualimetry is that quality depends on a large number of properties of object. Besides, it is necessary to consider also conditions in which the product will be used.

Any production or service has a set of properties. Understand its objective features which are shown by production, operation and consumption as properties of production. Distinguish production and consumer properties of production.

All set of the properties created in the course of production belongs to the production. It represents potential quality. Consumer properties of production characterize only that set of indicators which is among the most important and significant for the consumer. This real quality of production.

Quality indicators - the quantitative characteristics of one or several properties of production considered in relation to certain conditions of its creation, operation or consumption. Quality indicators quantitatively cause degree of ability of production to satisfy certain requirements (for example, quality of tubers of potatoes is characterized by amount of starch).

It is possible to allocate simple (the weight, capacity, length, etc.) and difficult (non-failure operation, maintainability, etc.) quantitative characteristics of one or several properties making quality, respectively single and complex indicators of quality.

Each type of production is characterized by the quality indicators. According to GOST 15467 use the following groups of indicators (tab. 1).

Table 1

Group of indicators

The characterized properties

Indicators

Appointments

The properties of production defining the main functions for which performance it is intended, and its applications causing area

Classification (tractor productivity, tension and power of an electrobulb) Functional (productivity, accuracy, measurement limit, range of action) Constructive (weight, overall dimensions) Operational (fuel consumption, power consumption) Structure and structure (concentration of substance, content of impurity)

Reliability

Property to keep operational indicators in the set limits during the demanded time or the demanded operating time

Non-failure operation (an average operating time to first failure, probability of no-failure operation during a certain term, failure rate) Durability (an average resource, service life before capital repairs, service life before write-off) Safety (average term of safety, the appointed period of storage) Maintainability (the average time of restoration of operating state, probability of maintenance during certain time)

Economical use of resources

Extent of use in a design of a product and at its operation of raw materials, materials, fuel, energy, a manpower

Specific expense of raw materials, materials, fuel, energy of Loss of raw materials under the regulated conditions Efficiency, total or specific labor input of operation of a product

Safety

The properties guaranteeing safety of the person and other objects at operation, service, transportation and storage of a product

Probability of safe work of the person during certain time Speed of action at operation of protection devices Resistance of isolation of current carrying parts the Electric durability of high-voltage chains

The ergonomic

Fitness to operation by the person

Hygienic (illumination, temperature, humidity) Anthropometrical (compliance of a design to the sizes of a body of the person) Psychophysiological (compliance to power, high-speed, visual, acoustical and other opportunities of the person)

The esthetic

Art expressiveness, rationality of a form, integrity of composition, compliance to fashion, etc.

Quality of registration of working rooms, production objects Influence of interiors, working clothes, registration of means and objects of the labor on its productivity

Technological effectiveness

Fitness of a design of a product to decrease in expenses of resources by production, operation and repair

Labor input Material capacity Power consumption Technological prime cost

Transportabel-to Nosta

Suitability to transport operations

The average duration of preparation for transportation Average labor input of preparation for transportation the Average duration of installation of production on means of transportation of a certain look vehicle volume Efficiency the Average duration of unloading

Standardization and unification

Saturation the standard, unified and original elements

Applicability coefficient repeatability Coefficient Coefficient of mutual unification for group of products

The patent and legal

Patent protection and purity of production

Indicators patent protection and purity of production

The ecological

Level of impact on environment at operation or consumption

Amount of the harmful impurity which are thrown out in environment Probability of emissions of harmful particles, gases, radiations, etc.

The economic

Costs of development, production, operation or consumption of production, and also economic efficiency of its production and application

Dependence of number of sales on quality of production Efficiency of improvement of quality of container and packing at sale of goods, etc.

Resistance to external influences

The level of processing, storage, transportation preventing need of rejection and loss

Dust of moisture protection Air permeability Crash-worthiness Vibration strength Resistance to influence of an external magnetic field Period of storage Preservation of nutrients

At an assessment of quality of domestic goods indicators are applied to the population: grade (foodstuff, production of light industry), group of complexity (household radio equipment), brand (cement, brick), category of quality (videotape).

In world practice for an assessment of degree of superiority of one part of production over another use gradation (a class, a grade) are the categories or the category appropriated to production having the same functional application but to which various requirements for quality are applied.

Classification of indicators of quality by various categories is presented in tab. 2.