Reference metadata describe statistical concepts and methodologies used for the collection and generation of data. They provide information on data quality and, since they are strongly content-oriented, assist users in interpreting the data. Reference metadata, unlike structural metadata, can be decoupled from the data.
Index of Production in Construction (IPC) is calculated to measure the short-term changes in volume of construction work carried out, broken down into building construction and civil engineering. Indicator is needed to analyse the development of the construction activity in the country. Data on own-account construction work carried out by construction enterprises are collected. IPC is presented in unadjusted, calendar adjusted and seasonally adjusted forms.
3.2. Classification system
National version (EVRK Rev. 2) of the Statistical Classification of Economic Activities in the European Community (NACE Rev. 2).
3.3. Coverage - sector
IPC covers economic activities listed in Section F of NACE Rev. 2 (Construction). All size classes are covered.
3.4. Statistical concepts and definitions
IPC is the relative measure of the trend in construction work carried out in the reference period. IPC is calculated based on the volume of own-account construction work carried out by construction enterprises within the country. Construction work carried out refers to the value (VAT excluded) of all kinds of work carried out when building a new structure, reconstructing, repairing (restoring) or demolishing an existing structure for a customer (sale) or for own needs. It excludes the value of land and design work.
3.5. Statistical unit
Reporting unit – legal entity, observation unit – KAU
3.6. Statistical population
The frame for identifying units for the population is the Business Register, it includes information about enterprises activity code by NACE Rev. 2, state, turnover, number of persons employed, address and others. In 2024 the frame population comprises 12640 observation units of all sizes and types with the main economic activity defined in the section F of NACE Rev.2.
3.7. Reference area
Geographical coverage of the IPC is whole territory of Lithuania. The activities outside the Lithuania are not included.
3.8. Coverage - Time
Quarterly data on IPC are available since I Q 1998, monthly data – since first month 2015.
3.9. Base period
Year 2021 = 100
Indices are transmitted to Eurostat, nationally data on production in construction are published in absolute figures (thousand EUR), indices and percentage changes.
The reference period of thedata transmitted to Eurostat is quarter. The length of the reference period is beginning and end of calendar quarter.
6.1. Institutional Mandate - legal acts and other agreements
All the non-confidential data are available on the Official Statistics Portal selected data are transmitted to Eurostat. Data are sent to other international organizations on request.
7.1. Confidentiality - policy
In the process of statistical data collection, processing and analysis and dissemination of statistical information, the State Data Agency fully guarantees confidentiality of the data submitted by respondents (households, enterprises, institutions, organizations and other statistical units), as defined in the Confidentiality policy guidelines of the State Data Agency.
7.2. Confidentiality - data treatment
Statistical Disclosure Control Manual, approved by Order No DĮ-26 of 19 January 2024 of the Director General of the State Data Agency;
The State Data Governance Information System Data Security Regulations and Rules for the Secure Management of Electronic Information in the State Data Governance Information System, approved by Order No DĮ-163 of 20 August 2024 of the Director General of the State Data Agency.
Where the respondent about whom or whose activity results the primary statistical data have been collected may be directly or indirectly identified on the basis of official statistical data, such official statistical data shall be confidential and protected in the manner prescribed by laws.
8.1. Release calendar
Statistical information is published in accordance with an Official Statistics Calendar, release dates are announced one year in advance.
Statistical information is prepared and disseminated under the principle of impartiality and objectivity, i.e. in a systematic, reliable and unbiased manner, following professional and ethical standards (the European Statistics Code of Practice), and the policies and practices followed are transparent to users and survey respondents. All users have equal access to statistical information. All statistical information is published at the same time – at 9 a.m. on the day of publication of statistical information as indicated in the calendar on the Official Statistics Portal. Relevant statistical information is sent automatically to news subscribers. Statistical information is published following the Official Statistics Dissemination Policy Guidelines and Statistical Information Dissemination and Communication Rules of the State Data Agency approved by Order No DĮ-208 of 8 October 2024 of the Director General of the State Data Agency.
Data are transmitted quarterly to Eurostat.
Data are disseminated monthly, quarterly and yearly to national users.
10.1. Dissemination format - News release
News releases are not prepared.
10.2. Dissemination format - Publications
The annual statistical information is provided in the electronic publication Lithuania in Figures.
10.3. Dissemination format - online database
Data is accessed in the Database of Indicators (Business statistics -> Construction -> Indicators of work carried out by construction enterprises).
Main tables produced: monthly, quarterly IPC (Total, Building construction and Civil Engineering) compared with base year, with the previous period and compared with the same period of the previous year (unadjusted, seasonal and calendar adjusted data).
10.4. Dissemination format - microdata access
State Data Agency may, on the basis of contracts concluded with higher education institutions or research institutes, provide statistical data to researchers of these higher education institutions and research institutes to carry out specific statistical analyses for research purposes. Statistical data are provided in accordance with the provisions specified in the Description of Procedure for Data Depersonalization and Pseudonymization. More information is available on the Official Statistics Portal, in the section Data Provision.
10.5. Dissemination format - other
Eurostat's database
10.6. Documentation on methodology
The survey methodology presented on the Official Statistics Portal.
10.7. Quality management - documentation
Metadata for IPC is updated every month and published on the Official Statistics Portal.
In 2007, a quality management system, conforming to the requirements of the international quality management system standard ISO 9001, was introduced at the State Data Agency. Main trends in activity of the State Data Agency aimed at quality management and continuous development in the institution are established in the Quality Policy.
Monitoring of the quality indicators of statistical processes and their results and self-evaluation of statistical survey managers is regularly carried out in order to identify areas which need improvement and to promptly eliminate shortcomings.
More information on assurance of quality of statistical information and its preparation is published in the Quality Management section on the State Data Agency website.
11.2. Quality management - assessment
The monitoring of the quality of IPC is based on the ESS quality requirements (relevance, accuracy, timelines and punctuality, accessibility and clarity, coherence and comparability). Quality of data is checked at all stages of data processing.
The inspection of statistical survey, testing of statistical questionnaire and updating survey methodology, self-assessment of survey manager are carried out. When the survey is closed for a reference period and IPC is calculated the response rate is about 99 per cent.
Strengths: monthly, quarterly data are comparable with an annual data, length of quarterly time series since 1998, monthly– since 2015.
Deficit: misclassification of main activity of enterprises occurs, when the sample for responding year is done.
12.1. Relevance - User Needs
The main users of statistical information are State and municipal authorities and agencies, international organisations, the media, research and business communities, students. Data is transmitted to Eurostat. The users' needs are satisfied without a breach of the confidentiality principle.
12.2. Relevance - User Satisfaction
From 2005, user opinion surveys have been conducted on a regular basis. Official Statistics Portal traffic is monitored; website visitor opinion polls, general opinion poll on the products and services of the State Data Agncy, target user group opinion polls and other surveys are conducted.
The compilation of a user satisfaction index is launched. The said surveys are aimed at the assessment of the overall demand for and necessity of statistical information in general and specific statistical indicators in particular.
12.3. Completeness
IPC is compiled for building and for civil engineering. The contents and level of detail of the indicator comply with the EU requirements.
13.1. Accuracy - overall
The frame population in the LT Business Register includes 12640 operating construction enterprises of all sizes and types with the main economic activity defined in the section F of NACE Rev.2. The statistical survey is conducted applying a stratified random sampling method. The sampling frame is based on actual information about enterprises in operation, their economic activity and the number of persons employed from the Statistical Business Register. Enterprises are stratified by number of persons employed: all enterprises with 50 and more persons employed are included in the sample, for other enterprises, a stratified random sampling method is used. A representative sample includes 1025 units.
To calculate the estimates Horvitz-Thompson estimator is using, that is unbiased.
The accuracy of the estimates is reached by eliminating non-sampling errors, such as coverage, non-response, response mistakes and processing errors, also by calculating sampling error.
Coverage errors appear by reasons of misclassification of units and changes in state of reporting units.
It is compulsory to respond to the survey. In case of non-response, units are contacted by telephone and email.
The sampling error in percent is calculated for main indicators of survey and published monthly.
Usually survey results are revised in the end of the year if need of revision appears.
13.2. Sampling error
A coefficient of variation is used as a measure of the precision of an estimate. The coefficient of variation is calculated for indicators on total construction, building and civil engineering. In 2024, the coefficient of variation of main variable "Total production in construction” varies between 2.3% to 2,8%.
13.3. Non-sampling error
Over-coverage error arises from the presence of units not belonging to the section F (construction) and deaths of sampled units.
The survey is compulsory and non-response is insignificant. Response rate at the data published nationality and provided to Eurostat is the same and it varies between 98% to 99% .
Measurement errors occur during data collection. To detect processing or response mistakes the electronic questionnaire and programming technical specification for data checking at the data entry stage are used.
14.1. Timeliness
Statistical information is published on the 45th day after the end of the reference period.
In case of delay, users are notified in advance by indicating the reason and a new date of publication.
100 per cent of statistical information is released on time.
15.1. Comparability - geographical
Statistical information is comparable among the EU countries.
15.2. Comparability - over time
There are no breaks in time series since 1998.
15.3. Coherence - cross domain
The data are confronted with data from VAT declarations from State Tax Inspectorate of Lithuania. Differences between data exist because data from VAT includes work done by subcontractors. IPC trend is comparable with the Structural Business Statistics data and with National Accounts.
15.4. Coherence - internal
Data are internally coherent. Each level of aggregated data is compiled directly from ower-level values.
The administrative burden for respondents and cost are determined for statistical survey in total and it is not possible to calculate for separate indicators.
Long-term planned (major) revisions are conducted after amendments in legal acts, due to changes in the base year, methodology and classifications entail revisions. The time series from 1Q 1998 are back-casted.
Seasonal adjustment models are revised once a year, data are revised for current year and 3 years backwards.
Unscheduled revisions are performed when significant respondents’ errors detected after statistical indicators had been officially published. The announced data are marked as revised.
Differences between growth rates, 2020-2024 average
Mean Revision (MR)
Mean Absolute Revision (MAR)
Unadjusted*
Calendar adjusted*
Seasonally adjusted**
Unadjusted*
Calendar adjusted*
Seasonally adjusted**
Total
1.06
1.42
-0.22
1.77
2.43
2.28
*As compared to the corresponding period of the previous year
** As compared to the previous period
18.1. Source data
The monthly statistical Survey on Construction Enterprises Activity is carried out applying a sampling method.
The sampling frame is based on information about enterprises in operation, their economic activity and the number of persons employed from the Statistical Business Register.
A representative sample (1025 units) comprising 8 percent of all construction enterprises in operating in the country was drawn for the year 2024.
All enterprises with 50 and more persons employed were included in the sample, for other enterprises, a stratified random sampling method is used.
Activity and number of persons employed are used to stratify the population of active construction enterprises. A new sample is drawn every year.
The sample sizes in stratum (persons employed classes):
1-4 : 2.0%
5-9 : 4.6 %
10-19 : 12.2 %
20-49 : 34.4 %
50 and more : 100%
18.2. Frequency of data collection
Monthly. The collected data are referring to full reference month
18.3. Data collection
The data are collected using the Construction Enterprise Activity Statistical Questionnaire (KS-01) via the Internet, through the Electronic Statistical Business Data Preparation and Transmission System e.Statistics.
18.4. Data validation
The first stage for error checking and correcting is the micro data collection stage. Data is checked and corrected when provided by the respondents via the Electronic Statistical Business Data Preparation and Transmission System e.Statistics. Quality control requirements are presented in the survey programming technical specification, therefore response mistakes and processing errors are checked at the data entry stage.
Detection of large differences between the response and the values provided by VAT data.
Detection of large differences between the current month and historical data.
Correction of a variable using the sum of other variables.
Statistical data completeness and reliability are checked; the item and unit non-response rates are determined.
The second stage of validation concerns aggregated data.
Detection of large differences between the current and past values (growth rates) – the current value should be compared with the previous values and with the corresponding of the previous year.
Before sending to Eurostat data file is validated and converted into SDMX_ML format using SDMX Converter Tool.
The data file is transmitted to Eurostat by eDAMIS.
18.5. Data compilation
In estimating the parameters, the missing data related to item non-response and unit non-response are compensated.
For the estimation of data on unit non-response, administrative data source (State Tax Inspectorate) is used. For other enterprises, that could not be estimated using administrative data source, the corrected weights are used.
For the imputation of item non-response, the previous periods' data submitted by those units are used.
IPC are calculated in comparison with the previous period, the respective period of the previous year and monthly average of base year 2021
18.6. Adjustment
The volume of production in construction is deflated using construction input price index (2021 = 100). It is carried out separately for residential building, non-residential building (results are summed up as building production) and civil engineering.
The time series are calendar and seasonally adjusted also trend series are produced, using the TRAMO/SEATS method in JDemetra+(v. 2.2.2). An indirect method is used for the IPC seasonal adjustment.
The model is chosen using a detailed analysis module. Logarithm transformation is tested. Seasonal and calendar factors are estimated, 2 regressors (Working days) are used, outliers are detected and corrected. The global economic crisis outlier is used. Critical value and automation of outlier detections disabled (using default options).
The national holiday's calendar is used. It is used additive decomposition on seasonal adjustment. Traditional statistical methods are used for the validation of the models. Diagnostic statistics are used to control the quality of seasonal adjustment. The significance levels, the number of outliers and statistics on residuals (residual normality, residual asymmetry, residual seasonality etc.) in data series are controlled. Seasonal adjustment models and parameters are fixed for one year and are revised once a year when the data of all reporting months are available. The horizon of revision takes 4 years: current year and 3 years backwards.
Index of Production in Construction (IPC) is calculated to measure the short-term changes in volume of construction work carried out, broken down into building construction and civil engineering. Indicator is needed to analyse the development of the construction activity in the country. Data on own-account construction work carried out by construction enterprises are collected. IPC is presented in unadjusted, calendar adjusted and seasonally adjusted forms.
13 June 2025
IPC is the relative measure of the trend in construction work carried out in the reference period. IPC is calculated based on the volume of own-account construction work carried out by construction enterprises within the country. Construction work carried out refers to the value (VAT excluded) of all kinds of work carried out when building a new structure, reconstructing, repairing (restoring) or demolishing an existing structure for a customer (sale) or for own needs. It excludes the value of land and design work.
Reporting unit – legal entity, observation unit – KAU
The frame for identifying units for the population is the Business Register, it includes information about enterprises activity code by NACE Rev. 2, state, turnover, number of persons employed, address and others. In 2024 the frame population comprises 12640 observation units of all sizes and types with the main economic activity defined in the section F of NACE Rev.2.
Geographical coverage of the IPC is whole territory of Lithuania. The activities outside the Lithuania are not included.
The reference period of thedata transmitted to Eurostat is quarter. The length of the reference period is beginning and end of calendar quarter.
The frame population in the LT Business Register includes 12640 operating construction enterprises of all sizes and types with the main economic activity defined in the section F of NACE Rev.2. The statistical survey is conducted applying a stratified random sampling method. The sampling frame is based on actual information about enterprises in operation, their economic activity and the number of persons employed from the Statistical Business Register. Enterprises are stratified by number of persons employed: all enterprises with 50 and more persons employed are included in the sample, for other enterprises, a stratified random sampling method is used. A representative sample includes 1025 units.
To calculate the estimates Horvitz-Thompson estimator is using, that is unbiased.
The accuracy of the estimates is reached by eliminating non-sampling errors, such as coverage, non-response, response mistakes and processing errors, also by calculating sampling error.
Coverage errors appear by reasons of misclassification of units and changes in state of reporting units.
It is compulsory to respond to the survey. In case of non-response, units are contacted by telephone and email.
The sampling error in percent is calculated for main indicators of survey and published monthly.
Usually survey results are revised in the end of the year if need of revision appears.
Indices are transmitted to Eurostat, nationally data on production in construction are published in absolute figures (thousand EUR), indices and percentage changes.
In estimating the parameters, the missing data related to item non-response and unit non-response are compensated.
For the estimation of data on unit non-response, administrative data source (State Tax Inspectorate) is used. For other enterprises, that could not be estimated using administrative data source, the corrected weights are used.
For the imputation of item non-response, the previous periods' data submitted by those units are used.
IPC are calculated in comparison with the previous period, the respective period of the previous year and monthly average of base year 2021
The monthly statistical Survey on Construction Enterprises Activity is carried out applying a sampling method.
The sampling frame is based on information about enterprises in operation, their economic activity and the number of persons employed from the Statistical Business Register.
A representative sample (1025 units) comprising 8 percent of all construction enterprises in operating in the country was drawn for the year 2024.
All enterprises with 50 and more persons employed were included in the sample, for other enterprises, a stratified random sampling method is used.
Activity and number of persons employed are used to stratify the population of active construction enterprises. A new sample is drawn every year.
The sample sizes in stratum (persons employed classes):
1-4 : 2.0%
5-9 : 4.6 %
10-19 : 12.2 %
20-49 : 34.4 %
50 and more : 100%
Data are transmitted quarterly to Eurostat.
Data are disseminated monthly, quarterly and yearly to national users.
Statistical information is published on the 45th day after the end of the reference period.
Statistical information is comparable among the EU countries.
