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{{about|the engineering indicator|the mathematical concept used in thermodynamics|process function}}
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A '''process variable''', '''process value''' or '''process parameter''' is the current measured value of a particular part of a process which is being monitored or controlled. An example of this would be the temperature of a furnace. The current temperature is called the process variable, while the desired temperature is known as the [[setpoint (control system)|set-point]]. The set point is usually abbreviated to SP, and the process value is usually abbreviated to PV.
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