Process control refers to methods used by manufacturers to ensure consistency in output. Process control systems include statistical quality control, data acquisition, and distributed control systems. These systems aid in startup operations and monitor the production process to identify defects and ensure compliance.
Process control is a term used to describe the different methods applied by producers and manufacturers in the production process with the aim of making sure that the entire production and manufacturing process follows a consistent pattern that leads to the expected result. In other words, process control is used to ensure some kind of uniformity of output. Process control systems refer to those systems used by manufacturers and producers to achieve this end and include statistical quality control, sequence controllers, data acquisition and control systems, and distributed control systems.
These types of process control systems are primarily mechanical equipment designed to aid in the control system. Some of them function as electronic components that play a key role in the control process, which can include assisting with startup operations. Startup operations refer to the processes involved in starting the production process after a shutdown. An example of this is a breakfast cereal manufacturing company that periodically engages in a complete shutdown while some maintenance or cleaning process is being performed on the machinery used in the production of the cereal. Another application of process control systems is the type of equipment that acts as automatic metering and measuring systems that apply process control to the product as it moves along the production line.
For example, if the product is a soft drink, this type of control system will monitor the entire process starting from setting the correct temperature for the product, measuring the ingredients, checking the bottles or cans for defects, making sure the caps the bottles are positioned correctly, and making sure that the bottles are placed in their boxes in the correct order. Some of the process control systems serve in a sort of supervisory or monitoring capacity for the other systems, in the sense that those systems monitor the performance of other process control systems to ensure that they are running smoothly and on schedule
Where an identified defect is found in any of the process control systems, the master control systems will shut down that particular system and sound some sort of alarm or signal to indicate that there is a problem somewhere along the production line. Another type of process control provides a sort of service that takes place at the end of the production process, which is oriented towards checking the finished product to ensure that it is compliant and free from defects.
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