Box, George; Kramer, Tim (1990, ASQC) University of Wisconsin-Madison, Madison, WI; Hewlett Packard, Avondale, PA
Rationales for Statistical Process Control (SPC) and for Automatic Process Control (APC) are explored and issues that sometimes arise are discussed. For the particular problem of process regulation the importance of, often unstated, assumptions is illustrated. Some implications of non-smtionarity are presented and minimum cost schemes obtained for some simple, but practically interesting, models for the disturbance, the dynamics, and for various costs. Some examination of the implications of non-stationarity is presented.
Chemical and process industries