I'd assume he/she means control in the engineering sense of the word: testing and inspecting. https://www.merriam-webster.com/dictionary/control https://www.me

I'd assume he/she means control in the engineering sense of the word: testing and inspecting. https://www.merriam-webster.com/dictionary/control https://www.merriam-webster.com/dictionary/control Merriam Webster says that meaning (definition 1a) of the word "control" is archaic, but I still hear it used from time to time. It's commonly used in a number of European languages.