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.
Economic activity, is quite simply, the activity of the economy. It includes the growth and shrinkage of the economy and all factors that affect this (for example Aggregate Ex â¦ penditure). It is commonly measured by the GDP (Gross Domestic Product) which is probably one of the most reliable economic indicator.on economic activity is just the opposite. Activity in the economy that does not affect GDP. My understanding is that it is essentially unpaid work. Like if you clean your house or mow your lawn and do not get paid for your time/efforts.