I'd assume he/she means control in the engineering sense of the word: testing and inspecting.

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.

Could also be in the sense of "control theory", where a feedback loop like measure->analyze->predict->change->repeat is applied.