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.
Short-Term Statistics and Tourism within Enterprises, Directory of Economic Statistics
1.3. Contact name
Confidential because of GDPR
1.4. Contact person function
Confidential because of GDPR
1.5. Contact mail address
Street Vllazën Huta, Building 35, Entrance 1, ZIP Code 1017, Tirana.
1.6. Contact email address
Confidential because of GDPR
1.7. Contact phone number
Confidential because of GDPR
1.8. Contact fax number
Confidential because of GDPR
2.1. Metadata last certified
19 March 2026
2.2. Metadata last posted
19 March 2026
2.3. Metadata last update
19 March 2026
3.1. Data description
Industrial Production (volume) Index (IPI) is designed to measure quarterly changes in the volume of industrial production. The main source is the Quarterly Survey of Short-Term Statistics, Questionnaire for Industry (Module 121) combined with administrative data.
3.2. Classification system
Statistical classification of economic activities used is NACE Rev. 2.
3.3. Coverage - sector
The survey (for this indicator) covers enterprises classified in Sections B, C, D and E of NACE Rev. 2. The survey covers all large and medium-sized enterprises as well as a representative number of small enterprises. A stratum is determined according to classes and is based on number of employed.
3.4. Statistical concepts and definitions
The objective of Industrial Production (volume) Index is to measure changes in the volume of output at close and regular intervals, mainly quarterly and annually. It provides a measure of the volume trend in value added over a given reference period. The Industrial Production (volume) Index is a theoretical measure that must be approximated by practical measures. Value added at basic prices can be calculated from turnover (excluding VAT and other similar deductible taxes directly linked to turnover):
+ capitalized production
+ other operating income
+/- the changes in stocks
- the purchases of goods and services
- taxes on products which are linked to turnover but not deductible
+ any subsidies on products received.
3.5. Statistical unit
The observation unit is the Enterprise.
3.6. Statistical population
Statistical population includes statistical units, in this case enterprises, which operate in economic activities according to NACE Rev. 2, Industry (sections B, C, D and E, respectively divisions 05-39) according to Statistical Business Register. The enterprises with 1-9 employed are surveyed by sample survey, whereas the enterprises with 10 and more employed are surveyed exhaustively.
3.7. Reference area
Industrial Production (volume) Index covers Albanian territory at a national level.
3.8. Coverage - Time
Quarterly Short-term Statistics Survey referred to Industrial Production (volume) Index is available from 2005 onwards.
3.9. Base period
Starting from the first quarter of 2024, the base year 2021 (2021 = 100) is in use.
Measurement units are indices and percentage changes (%).
The information collected refers to quarterly periods. This report is based on reference year 2025.
6.1. Institutional Mandate - legal acts and other agreements
The legal basis on which STS indicators are based consist on:
STS data transmission has started in the third quarter of 2017 at the European level. From the first quarter of 2018 data for main indicators are transmitted regularly to Eurostat.
Industrial Production (volume) Index (IPI) data transmission to Eurostat has not started yet because we produce IPI based on quarterly periods. IPI is regularly transmitted in International Monetary Fund (IMF) via (e-Gdds).
7.1. Confidentiality - policy
Data are considered strictly confidential and are used only for statistical and research purposes based on national Statistical Law No.17/2018 “On Official Statistics”, date 10 March 2018 and the Law No. 124/2024 on the Protection of Personal Data, Article 31 on Statistics Law reads as follows: Data collected for the production of official statistics shall be treated by INSTAT as confidential and shall be used only in aggregated tables that will not identify the source information unit. Direct identification means when a statistical unit is directly identified from its name or address or any officially allocated and commonly known identification number. When data processing is made in a manner that allows the identification of the data subject, the data should immediately be encrypted in order for the subjects to be no longer identifiable.
7.2. Confidentiality - data treatment
Albanian Institute of Statistics protects and does not disseminate data it has obtained or it has access to, which enable the direct or indirect identification of the statistical units. Albania Institute of Statistics takes all appropriate preventive measures so as to render impossible the identification of individual statistical units by technical or other means that might reasonably be used by a third party. Statistical data that could potentially enable the identification of the statistical unit are disseminated by Albania Institute of Statistics if and only if:
a) these data have been treated, as it is specifically set out in the Regulation, in such a way that their dissemination does not prejudice statistical confidentiality or
b) the statistical unit has given its consent, without any reservations, for the disclosure of data.
The confidential data that are transmitted to Albania Institute of Statistics are used exclusively for statistical purposes and the only persons who have the right to have access to these data are the personnel engaged in this task. Issues referring to the observance of statistical confidentiality are examined by the staff working in Albania Institute of Statistics. The responsibilities of this staff are to recommend on: which detailed level the statistical data can be disseminated, so as the identification, either directly or indirectly, of the surveyed statistical unit is not possible; the anonymization criteria for the microdata provided to users; the access granting to researchers on confidential data for scientific purposes.
8.1. Release calendar
Notifications about the dissemination of statistics are published in the release calendar, which is available on the website. The announcements and delays are pre-announced in this calendar. In the case of delays, the date of the next publication and the explanation of the reasons for the delays are specified.
According with the article 34 of Law No.17/2018 “On Official Statistics”, dated in 17 April 2018, disseminates statistics on INSTAT website and other media for simultaneous access, respecting professional independence and in an objective, professional and transparent manner in which all users are treated equitably. Users can also access the data directly through the official Eurostat website.
The following dissemination channels are used to release the results:
The Industrial Production (volume) Index is disseminated on quarterly basis.
10.1. Dissemination format - News release
According to the calendar of publications, press release regarding Short-term statistics is published quarterly. The format of press release has not been changed; it is defined by publication sector as well as the date of release. Press releases of STS are published online at INSTAT's website.
10.2. Dissemination format - Publications
Press release is published in INSTAT’s website, under sub-theme: ShortTerm Statistics.
10.3. Dissemination format - online database
All the information is available in both Albanian and English language. Since 2011, the information is provided to external users in web through the Pc-Axis system. A short methodological explanation exists also in the web page. You can access the database on the section Statistical Database.
10.4. Dissemination format - microdata access
Databases at micro level are not published due to confidentiality reasons. Aggregated data is the only type of data that is provided to external users. Although the micro data are not published they can be accessed based on the article 31, point 7 of the low No. 17/2018, dated 17 April 2018 “On official statistics”.
10.5. Dissemination format - other
Industrial Production (volume) Index data transmission to Eurostat has not started yet because we produce Industrial Production (volume) Index based on quarterly periods.
Users can send other specific requests through a dedicated section for Contacts.
10.6. Documentation on methodology
A short explanation related to the definitions of the main concepts and methodological explanations are provided to users in the end of press releases and publications. Additional support information is given to internal users when needed or required. Also the Methodological notes are published at INSTAT’s website.
10.7. Quality management - documentation
Short-Term Statistics and Tourism within Enterprises Sector document all the STS work processes and procedures only for internal purposes.
11.1. Quality assurance
INSTAT is committed to ensure the highest quality with respect to the compilation of statistical information. In accordance with the Statistics Law, INSTAT use statistical methods and processes in compliance with internationally recognized scientific principles and standards conduct ongoing analyses of the statistics with a view to quality improvements and ensure that statistics are as up to-date. In performing its tasks, it follows the general principles of quality management from the European Statistics Code of Practice. INSTAT declares that it takes into account the following principles: impartiality, quality of processes and products, user orientation, employee orientation, effectiveness of statistical processes, reducing the workload for respondents.
11.2. Quality management - assessment
Quality controls and validation of data are actions carried out throughout the process. The staff is involved in different stages of index calculation, such as the data collection, data control, data input and other necessary control are all well trained. This helps the staff to know the enterprises and their responsibilities and keep an updated collaboration.
A comparison is made with data of previous year to see if there is any data coherence or if there were major changes.
12.1. Relevance - User Needs
Users are classified as external and internal. External users are:
Ministries and public administrations that use these data for economic and social policy planning purposes.
Universities (professors/graduated and post graduate students), research organizations.
National and international NGO’s.
Enterprises
General public which gets the information via mass media through publications made by Statistical Office.
Eurostat.
Internal users are those within the institution of INSTAT:
National Account Directory
Statistical Business Register
Employment and wages Sector
12.2. Relevance - User Satisfaction
INSTAT annually conducts the Survey for Measuring User Satisfaction, the results of which are published on the web at the link: User Satisfaction Survey.
12.3. Completeness
Short-term statistics on their completeness are built in accordance with Eurostat regulations. The degree of completeness of the data, for the survey of STS 2025 is 62.0 %. This calculation, the compilation of the Industrial Production (volume) Index and the data provided are in accordance with the relevant EU Regulations.
13.1. Accuracy - overall
Overall, the data are checked with previous years and previous quarter to identify any significant changes.
The sampled population of STS 2025 includes approximately 11,462 enterprises that are surveyed each quarter, from these around 2,500 are in Industry activity. Sampling design is stratified simple random sampling. Criteria used for stratification is the number of employees according to the NACE Rev. 2, 3-digit level.
Calculation of statistical data estimates and analysis of outlier units is performed regularly. The overall accuracy rate is high, considering the high response rate. To calculate the estimates, Horvitz-Thompson estimator is used, that is unbiased. The accuracy of the estimates is reached by eliminating sampling errors and non-sampling errors, such as coverage, non-response, response mistakes and processing errors.
Coverage errors reasons are: misclassification of units and changes in state of reporting units. In case of non-response, units are contacted by telephone and email. The sampling error in percent (CV) is calculated for main indicators of survey that are published every quarter.
13.2. Sampling error
Sampling errors are treated in the internal technical reports, where, for main indicators in survey are calculated the total variance and relative standard errors, to eliminate the negative effect of NACE activity changed in STS time series. All indicator values are weighted to represent the population.
13.3. Non-sampling error
Unit non-response takes in consideration enterprises that are unable or unwilling to give the answers or when interviewers are unable to find the enterprises address, or when other barriers exist to complete the interview. The unit non-response rate in average for STS 2025 is 2.44 %.
14.1. Timeliness
Results of Industrial Production (volume) Index are published on INSTAT website 78 days after the end of the reference period (T+ 78 days). The reference period of these results is 31 December 2025.
Reference period: 31 December 2025
Date of publication: 19 March 2026
Timeliness: 78 days
14.2. Punctuality
The data of Industrial Production (volume) Index are disseminated according to the publication calendar. The reference period of these results is December 31st, 2025.
Reference period: 31 December 2025
Date of announcement: 19 March 2026
Date of publication: 19 March 2026
Time lag: 0 days
15.1. Comparability - geographical
The data related to Industrial Production (volume) Index (IPI) are prepared in accordance with Eurostat methodology and are comparable at international level. These data are comprehensive and produced at the country level.
15.2. Comparability - over time
Over the years IPI has undergone changes in coverage and in the method of selection. Quarterly Survey of Enterprises has started for the first time in 2005. Enterprises with 1-9 employed are sampled with selection, while enterprises with over than 10 employed are taken exhaustively, without changing the scope of coverage. In 2012, the population of the IPI has changed as a result of updating the Register of Enterprises with the results of the Economic Enterprises Census 2010. All changes are back casted and reported in the methodological explanations of publications. In 2014 in IPI it was implemented the nomenclature of economic activities, NACE Rev. 2, the update of weights structure, and changing the base period of the indices from 2005 to 2010.In 2019, in STS the weights structure is updated and the basic index period changes from 2010 to 2015. In 2024, in Short-Term Statistics the weights structure is updated and the basic index period has changed from 2015 to 2021. All these changes in the indices series are not disconnected, but the indices are back casted. These changes are reported in the methodological explanations that go together with respective publications.
Short-term Statistics data by quarters are based on NACE Rev. 2 Economic Activity Classification since 2006 referring to the statistical database providing a time comparability of 19 years (CC2 = Jlast-Jfirst + 1 = 19).
The data are constantly checked to ensure their comparability over time.
15.3. Coherence - cross domain
STS production in industry for the greater part is measured by using VAT data. For enterprises that VAT data are not available data are collected through sample survey. There is no other statistical product that could be used for cross checking instead of the current indicators.
15.4. Coherence - internal
The internal consistency of the data is checked before it is finalized. The links between variables are checked and coherence between different data series confirmed. Short term statistic specialists work together with relevant departments to ensure consistency and coherence of statistical indicators.
STS cost includes information on the permanent and temporary number of the staff. STS number of staff are as following:
Total staff in Central Office 1 employee;
Logistics specialists 1 employee;
Enumerators 124 employees;
Controllers 2 employees.
Administrative data are sent to INSTAT at no cost. based on Memorandum of Understanding (MoU) between INSTAT and GDT (General Directorate of Taxes). Other sources are considered BR, previous STS, etc. STS staff manages the control and analysis of data, so these two processes have no additional cost.
17.1. Data revision - policy
Revision policy is done in accordance with general revision policy and errors treatment policy introduced by INSTAT in the links below:
The same revision policy is applied to national releases and transmissions to Eurostat.
17.2. Data revision - practice
Published data are not considered final; they may be revised. Data are revised in the whole range or for other reasons such as: Implementation of the new NACE classification, methodological changes, new information or data improvements and error correction. But the revisions are generally rather limited in scale. Revision of the previous quarter is possible during each quarter and adjustments can be made at the end of each year for the four quarters.
During 2024 the Production (volume) Index in Industry has not been revised. No numeric information exists regarding the Mean Absolute Revision (MAR) and Mean Revision (MR).
18.1. Source data
Data are based on quarterly statistical surveys and administrative source. The basis of selection is the Register of active enterprises for the reference year. Classification of enterprises is done according to the Nomenclature of Economic Activities, NACE Rev. 2. Frame population is determined by two basic criteria: Size of enterprise (based on number of employed) and economic activity in scope, with cut-off. The method of selection used is Stratified Simple Random Sampling (SRS). Stratification is based on a combination of economic activity with size group of the enterprise. Indicators are presented for economic activities according to the areas specified in the STS regulation and also based on user needs.
18.2. Frequency of data collection
Data are collected quarterly.
18.3. Data collection
During 2025, data were provided in a combined way through administrative sources and data collected directly from enterprises with face to face interviews. The duration of the data collection process was 15 days after the reference quarter and was conducted only for enterprises which were not subject of declaration in administrative sources.
During the reference year, there are no changes planned in the questionnaire.
18.4. Data validation
Data received from survey and from VAT file are validated using logical validation rules.
At national level, editing involves studying data from respondents with the aim of identifying (and eventually correcting) errors. Not all errors can be identified and the aim is to detect the errors that have a significant influence on the results. Rules to assist in identifying errors may flag possible errors that require further investigation to determine where there really is an error as opposed to an unusual result or they may identify definite errors. Editing involves checks for completeness, that values are within given ranges and that values for related variables are coherent. Data editing may take place during or after data entry.
Responses can be compared to the response of previous quarters. Inconsistency or large deviations (outside of a pre-established range) indicate that a closer look is desirable. This may result in data editing. In the context of timeliness, the editing process may be designed to give top priority to those outliers that are most in need of editing for the sake of reliable aggregates. By solving the worst cases, large improvements can be achieved.
18.5. Data compilation
National level
First step is collecting information from administrative data and direct interviews. The purpose is to bring this information to the statistic level. This process follows:
Physical control of questionnaires completeness.
Logical control of questionnaires (control of logical marked of responses indicators, description and codification of activity, and control of accurate values).
Editing process of data collected (errors and modification)
Non response units and the missing information for very important enterprises (big units) are completed through the imputation process using information taken from other sources.
Comparability phase (collected survey data with the administrative sources, previous periods or trends).
Analysis of results for each domain of publication
Completed results are used for weight and re-weight phase
The aggregated data are compared to other data sources
The last two phases can be subject to other analysis used for publication domain.
When statistical analysis is finished, these data are determined as a group of non-public information. Before releasing the results, very important matter is the confidentiality of this information.
18.6. Adjustment
The Industrial Production (volume) Index is calculated seasonally adjusted and seasonally unadjusted.
Seasonal adjustment of quarterly time series of Production is done by using JDemetra+ 2.2.4 version software. The chosen model for the decomposition of time series is X-12 ARIMA, under specification X-13. The span of time series is from 2006 to 2024. X-12 ARIMA model is totally based in moving average. In multiplicative method there is a relationship between trend component, seasonal component and irregularity component. Irregularity component may include sampling errors and unpredictable events. In all-time series is applied the multiplicative decomposition and the direct approach. During the process of seasonal adjustment are treated even the special case occurred during the time series span identified by software as outlier.
No further comments
Industrial Production (volume) Index (IPI) is designed to measure quarterly changes in the volume of industrial production. The main source is the Quarterly Survey of Short-Term Statistics, Questionnaire for Industry (Module 121) combined with administrative data.
19 March 2026
The objective of Industrial Production (volume) Index is to measure changes in the volume of output at close and regular intervals, mainly quarterly and annually. It provides a measure of the volume trend in value added over a given reference period. The Industrial Production (volume) Index is a theoretical measure that must be approximated by practical measures. Value added at basic prices can be calculated from turnover (excluding VAT and other similar deductible taxes directly linked to turnover):
+ capitalized production
+ other operating income
+/- the changes in stocks
- the purchases of goods and services
- taxes on products which are linked to turnover but not deductible
+ any subsidies on products received.
The observation unit is the Enterprise.
Statistical population includes statistical units, in this case enterprises, which operate in economic activities according to NACE Rev. 2, Industry (sections B, C, D and E, respectively divisions 05-39) according to Statistical Business Register. The enterprises with 1-9 employed are surveyed by sample survey, whereas the enterprises with 10 and more employed are surveyed exhaustively.
Industrial Production (volume) Index covers Albanian territory at a national level.
The information collected refers to quarterly periods. This report is based on reference year 2025.
Overall, the data are checked with previous years and previous quarter to identify any significant changes.
The sampled population of STS 2025 includes approximately 11,462 enterprises that are surveyed each quarter, from these around 2,500 are in Industry activity. Sampling design is stratified simple random sampling. Criteria used for stratification is the number of employees according to the NACE Rev. 2, 3-digit level.
Calculation of statistical data estimates and analysis of outlier units is performed regularly. The overall accuracy rate is high, considering the high response rate. To calculate the estimates, Horvitz-Thompson estimator is used, that is unbiased. The accuracy of the estimates is reached by eliminating sampling errors and non-sampling errors, such as coverage, non-response, response mistakes and processing errors.
Coverage errors reasons are: misclassification of units and changes in state of reporting units. In case of non-response, units are contacted by telephone and email. The sampling error in percent (CV) is calculated for main indicators of survey that are published every quarter.
Measurement units are indices and percentage changes (%).
National level
First step is collecting information from administrative data and direct interviews. The purpose is to bring this information to the statistic level. This process follows:
Physical control of questionnaires completeness.
Logical control of questionnaires (control of logical marked of responses indicators, description and codification of activity, and control of accurate values).
Editing process of data collected (errors and modification)
Non response units and the missing information for very important enterprises (big units) are completed through the imputation process using information taken from other sources.
Comparability phase (collected survey data with the administrative sources, previous periods or trends).
Analysis of results for each domain of publication
Completed results are used for weight and re-weight phase
The aggregated data are compared to other data sources
The last two phases can be subject to other analysis used for publication domain.
When statistical analysis is finished, these data are determined as a group of non-public information. Before releasing the results, very important matter is the confidentiality of this information.
Data are based on quarterly statistical surveys and administrative source. The basis of selection is the Register of active enterprises for the reference year. Classification of enterprises is done according to the Nomenclature of Economic Activities, NACE Rev. 2. Frame population is determined by two basic criteria: Size of enterprise (based on number of employed) and economic activity in scope, with cut-off. The method of selection used is Stratified Simple Random Sampling (SRS). Stratification is based on a combination of economic activity with size group of the enterprise. Indicators are presented for economic activities according to the areas specified in the STS regulation and also based on user needs.
The Industrial Production (volume) Index is disseminated on quarterly basis.
Results of Industrial Production (volume) Index are published on INSTAT website 78 days after the end of the reference period (T+ 78 days). The reference period of these results is 31 December 2025.
Reference period: 31 December 2025
Date of publication: 19 March 2026
Timeliness: 78 days
The data related to Industrial Production (volume) Index (IPI) are prepared in accordance with Eurostat methodology and are comparable at international level. These data are comprehensive and produced at the country level.
Over the years IPI has undergone changes in coverage and in the method of selection. Quarterly Survey of Enterprises has started for the first time in 2005. Enterprises with 1-9 employed are sampled with selection, while enterprises with over than 10 employed are taken exhaustively, without changing the scope of coverage. In 2012, the population of the IPI has changed as a result of updating the Register of Enterprises with the results of the Economic Enterprises Census 2010. All changes are back casted and reported in the methodological explanations of publications. In 2014 in IPI it was implemented the nomenclature of economic activities, NACE Rev. 2, the update of weights structure, and changing the base period of the indices from 2005 to 2010.In 2019, in STS the weights structure is updated and the basic index period changes from 2010 to 2015. In 2024, in Short-Term Statistics the weights structure is updated and the basic index period has changed from 2015 to 2021. All these changes in the indices series are not disconnected, but the indices are back casted. These changes are reported in the methodological explanations that go together with respective publications.
Short-term Statistics data by quarters are based on NACE Rev. 2 Economic Activity Classification since 2006 referring to the statistical database providing a time comparability of 19 years (CC2 = Jlast-Jfirst + 1 = 19).
The data are constantly checked to ensure their comparability over time.
