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{{about|the engineering indicator|the mathematical concept used in thermodynamics|process function}}
{{noref|date=November 2018}}
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.<ref name=Bequette>
{{cite book |author=B. Wayne Bequette | title = Process Control: Modeling, Design, and Simulation | publisher =Prentice Hall Professional | year= 2003 | page = 5 |url=https://books.google.com/books?id=PdjHYm5e9d4C&pg=PA5 |isbn = 9780133536409 }}
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==Control system use==
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