Value Added:
Value added is a central concept of production and refers to the generated value of any unit
that carries out any productive activity. Gross value added is defined as the value of gross
production less the value of intermediate consumption
Universe
All enterprises and establishments are classified according to the Establishments Census 2007
Source of information
The enterprise owner or general manager
Imputation and derivation
Imputation
After the editor finishes editing the questionnaire, a coding are used according to (ISIC - 4), then the questionnaire is transferred to data entry.
Derivation
The interviewer and supervisor firstly edit technically the questionnaire according to editing rules