There are 3 main types of process control that can be separately identified in industry.
The Discrete process control is a single process that might form part of a production line. For example, a machine might punch certain shapes out of a sheet steel of metal. The process has one action and only one purpose.
The Batch process control is a single process with multiple actions. For example, in a production line to assemble automobiles, there are various actions required to install the interior furniture of the vehicle. Likewise, there are various actions involved to install the engine and connect all the external fittings to the engine.
The Continuous process control is a continuous process adjustment. For example, the monitoring of gas or water pressure with calibrated adjustments made. A heating thermostat will continuously calibrate the ambient temperature and make the necessary adjustments to keep the ideal temperature maintained.
Other types of process control will be a hybrid of those 3.