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6. Process or Product Monitoring and Control
6.1. Introduction


What is Process Control?

Two types of intervention are possible -- one is based on engineering judgment and the other is automated Process Control is the active changing of the process based on the results of process monitoring. Once the process monitoring tools have detected an out-of-control situation, the person responsible for the process makes a change to bring the process back into control.

  1. Out-of-control Action Plans (OCAPS) detail the action to be taken once an out-of-control situation is detected. A specific flowchart, that leads the process engineer through the corrective procedure, may be provided for each unique process.

  2. Advanced Process Control Loops are automated changes to the process that are programmed to correct for the size of the out-of-control measurement.
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