1. comprehensive control in advance (Precontrol or Feed forward) is controlled to prevent the process to see whether or not continued as planned, then there is a change or process inputs.2. between the control (Concurrent Control) control during operation or while the event is in progress.3. the data controller (Feedback Control) is a reverse control after the action has already occurred, the output (output) of the measurement process and used in the system, or how to resolve the various factors that are used in production (input) less power compared to all.
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