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.
Some of the major yardsticks for assessing the performance of the economy and setting economic policy include gross domestic product to measure the nation's output, the consumer price index to gauge inflation, and the unemployment rate. The URLs for the macroeconomic measures in this chapter are grouped by the categories of: 1  Measuring Economic Growth. 2  Prices and Inflation. 3  Unemployment. Business Cycles and the Economy. 4  Alphabetical(5) Global Index.