When a process is such that there is appreciable delay in control action taking effect, minimal variance feedback control can require excessive adjustment. In this report it is supposed that the cost of making the adjustments ...

Some of the issues mentioned in technical Report #41 concerning the proper uses of Statistical Process Control and Automatic Process Control are discussed in greater detail in this report.

The problem of choosing a control scheme that minimizes the combined costs of monitoring, adjustment and being off-target is discussed. In addition to the various costs, the choice depends on the nature of the disturbance ...

The roles of Statistical Process Control for process monitoring and of Automatic Process Control for process regulation are considered and common misunderstandings discussed. Simple examples are used to show how the ...