Statistical Process Control (SPC) Methods. Statistical process control (SPC) monitors specified quality characteristics of a product or service so as: To detect whether the process has changed in a way that will affect product quality and. To measure the current quality of products or services. Control is maintained through the use of control charts.
The underlying basis of criticism of GDP as a measure of welfare is the divergence between the critic's values and market values. The critics make an implicit assumption, or, quite possibly, a conscious presumption, that the former values are superior, if not far superior, to those of the latter.
The real economic growth rate is a measure of the rate of change that a nation's gross domestic product (GDP) experiences from one year to another.Gross national product (GNP) can also be used if a nation's economy is heavily dependent on foreign earnings.he real economic growth rate is a constant dollar and is therefore a more accurate look at the rate of economic growth because it is not distorted by the effects of extreme inflation or deflation.