MEASUREMENT OF NATIONAL INCOME

How could the error of double counting be avoided ?
Or
What is the solution to the problem of double counting in the estimation of national income ?

Name the steps involved in estimating NVAFC of an enterprise.

Define the concept of value added.

Name the components of domestic factor income in the income method.
Or
Name the components of factor income.

Name the three industrial sectors into which all production units are broadly classified for the measurement of national income.

Define primary sector.