• Data reference period (Month)
• Geographic localization (Portugal)
• Economic activity (Division - CAE Rev. 3)

• CONSTRUCTION:  A type of work (buildings, roads, bridges, dams,etc.) connected to the ground and made of construction materials. Ground workfor agricultural purposes (e.g. ploughing) does not fall under the heading of construction.
• ECONOMIC ACTIVITY:  Combination of resources such as labour, raw materials, equipment, etc., are joined, leading to the creation of specific goods or services. Regardless of the factors of production integrating the good or service produced, all activities generically imply an input of products (goods or services), a production process and an output of products (goods or services).
• ENTERPRISE:  Legal entity (natural or legal person) that is an organisational unit producing goods or services, which benefits from a certain degree of autonomy in decision-making, especially for the allocation of its current resources. An enterprise carries out one or more activities at one or more locations.
• REFERENCE PERIOD:  Period to which the information refers and which may be a specific day or a time interval (month, fiscal year, calendar year, among others).

Construction and Public Works Confidence Indicator is calculated according to the methodology of the EC - DG ECFIN, and corresponds to the arithmetic mean of the balances of the following questions:

- Do you consider your current overall order books to be…?: 1. + more than sufficient (above normal); 2. = sufficient (normal for the season); 3. − not sufficient (below normal).

- How do you expect your firm´s total employment to change over the next 3 months? It will...; 1. + increase; 2. = remain unchanged; 3. -  decrease