Structure of the groups of classification in the classification of occupations for year 2007 and 2010

	Name of the major group	The number of groups within the major group						Number of occupations and specialties
		Sub-major		Minor		unit
		2007	2010	2007	2010	2007	2010	2007	2010
1	The authorities, higher officials and managers	4	4	6	11	33	31	43	141
2	The experts	4	6	20	30	65	98	475	663
3	Technicians and different average staff	4	5	17	20	69	87	314	471
4	Office workers	2	4	7	8	20	27	54	68
5	Workers of personal services and salesman	2	4	7	12	21	39	80	132
6	Farmers, gardeners, foresters and fishermen	4	3	8	9	13	17	42	54
7	Industrial workers and craftsmen	4	5	17	14	74	69	330	396
8	Operators and the fitters of machines and equipment	3	3	20	14	72	41	338	334
9	Workers for simple works	3	6	10	11	21	32	90	98
10	Armed forces	1	3	4	3	4	3	4	3
TOTAL		31	43	116	132	392	444	1 770	2 360

The International Standard of the Classification of Occupation ISCO-08 includes 10 major groups of occupations, which the in the result of successive breakdowns create sub-major, minor and unit groups. If the number of major groups have not change in the comparison with earlier classifications, the number of remaining groups was changed, and sometimes also and their arrangement in the structure. MOP worked out the descriptions of the activity which persons classified to every of these groups does, and in descriptions of the unit groups indicate the examples of occupations which should be classified in the given group. What is important, in ISCO-08 standard was changed classification principle that was established in the earlier versions of ISCO. Accepted assumption that for classifying an occupation to the group first of all is determined by the character of performed tasks, but in the smaller degree formal education and undergone trainings. However the formal level of education, adopted from the classification ISCED, also determines the membership to a group. Poland the classification takes into account these new classification principles, the principal arrangement of groups and the coding system of the ISCO-08 standard.

Differences between structure of groups of contest in KZiS 2010 and ISCO-08

KZiS 2010	ISCO-08
In the sub-major group 22 Health professionals distinguished separately unit groups 2221 Nurse without specialization and 2222 Nurse specialist; there is not nurses group in the sub-major group 32 Health associate professionals	In the sub-major group 22 Health professionals nurses are in one unit group 2221 Nursing professionals, there is additionally unit group 3221 Nursing associate professionals in the sub-major group 32 Health associate professionals
In the sub-major group 22 Health professionals there is not the group Traditional and complementary medicine professionals; professionals in this field can be classified in the group 323 Traditional and complementary medicine associate professionals	In the sub-major group 22 Health professionals there is the group 223 Traditional and complementary medicine professionals with hypothetical occupations acupuncturist, the expert of Chinese natural medicine, the homeopath¸ the naturopath. There is additionally in the sub-major group 32 Health associate professionals unit group 3230 Traditional and complementary medicine associate professionals with hypothetical occupations: the bone-setter, herbalist, sorcerer, quack, the expert of the vacuums therapy and gua-sha.
More detailed minor group 227 Laboratory diagnosticians: diagnostician without specialization and 13 specialization in this occupation	Laboratory diagnosticians are not distinguished separately, they are included in the unit group , 2269 Health professionals not elsewhere classified
Among the average medical staff there is lack some unit groups from ISCO-08	The average medical staff includes technicians for computing and medical data and medical assistants
Same unit groups are missing which are present in ISCO-08 in the sub-major group 4 Clerical support workers, 6 Skilled agricultural, forestry and fishery workers and 7 Craft and related trades workers	There are present unit groups: 4414 Scribes and related workers, 6624 Hunters and trappers, 7516 Tobacco preparers and tobacco products makers
Unit group 2441 Property market professionals including among others mediators in the property market and property administrators are placed in the Polish classification in the major group 2 Professionals	Unit group 3334 Real estate agents and property managers is placed in the major group 3 Technicians and associate professionals

For example:
- the survey of the prices of service producers - KZiS is used on the 6-digits level
- the survey of the household budgets (2012) - KZiS is used on the 2-digits level
- the survey of the population budget of time (planned in 2013) - KZIS will be used on the 3-digits level

- EU Statistics on Income and Living Conditions EU-SILC
During interviews with respondents are gathering information relating to the performed occupation on the level of minor group, e.g. 3 digits. However in the sets send to Eurostat and used for making data available (according to the methodology of the survey) information on the level of sub-major group is included (2 digits).

- data concerning survey of the labour market - e.g. survey of the free places of work, the structure of earnings and Labour Force Surveys (LFS) - are gathered on the level of the subclass, but published on the level of the section, excluding the structure of survey of earnings (3-digits level).

The Classification of Occupations and Specialities 2010 is used in statistical surveys on labour market and wages and salaries (for example job vacancy survey, structure of earnings and labour force survey-LFS) for collection and analysis data, then dissemination. Generally information is collected by the lowest level, however generally data are published at the level of the “large occupational” (for example in the LFS), with the exception of the structure of earnings survey – at the level of the “medium groups” (on the 3 digit level).