Volume index of production in construction

The volume index of production in construction characterises changes in the construction output during the reference period, in comparison with the base period. Index is important to monitor and evaluate development of the construction sector and is widely used in the analysis of business cycles. It provides approximation to the trend of the value added volume over a given reference period.

Construction output consists of the value of own-account construction works completed by the construction enterprises during the reference period. 

Surveyed units - kind of activity units.

Responding units - enterprises.

The target population covers all economically active enterprises the main or secondary activity of which in compliance with the NACE Rev. 2 is construction (Section F, classes 41.20–43.99).

• Council Regulation (EC) No 1165/98 of 19 May 1998 concerning short-term statistics
• Regulation (EU) 2019/2152 of the European Parliament and of the Council of 27 November 2019 on European business statistics, repealing 10 legal acts in the field of business statistics

Statistics database

EU data on Eurostat website Section: Construction, building and civil engineering.

Data on the construction output index are comparable since 2000. Construction output at current prices by industry is available from 2015, but by type of construction from 2018.

Number of comparable time periods

As there are no breaks in the time series, the indicator is equal to the number of time points in the time series.

N/A

The data are compiled based on the CSB quarterly questionnaire on construction (1-construction).

Framework source: Statistical Business Register (SUR)

Type of sample: single - stage sample

Sampling coordination: independent sampling

Stratification variables: target population, industry, size class by number of employees

Allocation: optimal proportional

Sampling: A stratified simple random sample

Target population: In 2022, economically active statistical units whose main activity is NACE Section F, excluding industry 4110 and excluding statistical units whose ISK starts with S13.

The sample includes all enterprises with at least 20 employees and NACE Rev. 2. F 4213 with at least 5 employees. Units with fewer employees are surveyed at random using stratified simple random sampling. Statistical units with less than 5 employees (except NACE Rev. 2 F 4322, 4332, 4334, 4339 - with less than 20 employees and NACE Rev. 2 F 4333, 4399 with less than 7 employees) are valued, using administrative data (volume of VAT transactions).

The number of units in each part of the population varies. It is adjusted to include new economically active enterprises (according to the above criteria) in the set of surveyed statistical units, specifying the economic activities of enterprises, receiving additional or clarified information from respondents, as well as more up-to-date data from administrative data sources.

Data on construction output are collected using Form 1-Construction "Report on self-construction by enterprises". Most data is submitted in the form of an e-report, other forms of submission (mail, e-mail, telephone) are less common.

When the form or automatic validation controls change, training for data collectors (statisticians) is provided, as well as instructions are prepared for both respondents and statisticians.

Respondents receive notifications and reminders about the need to submit a report if the submission deadline is approaching. If the respondents do not submit the report in time, they will be contacted by statisticians. Each report (respondent) not submitted on time is coded with an appropriate non-response code with an explanation attached to it.

When connecting to the e-reporting system and selecting the appropriate report, the information about the applicant is filled in automatically and only the information needs to be checked and corrected (in case of changes).

Calculation of the volume index of production in construction (henceforth – the IPC) is based on the chain-linked index method. Within the framework of it, the average volume of construction work done (at constant prices) in previous year is used as a calculation basis, and the value added of construction enterprises produced two years ago by NACE chapters is used as weights. IPC is calculated by recalculating construction production value indicator at constant prices with the help of corresponding construction cost indices.

Weights are changed every year, thus changes in the structure of construction are taken into account.