This is the 15848th most frequent Russian word.
производственного
"Of production" or "industrial."
The word "производственного" here functions as an adjective describing the type of complex, indicating its association with production activities.
Мы посетили производственного комплекса.
We visited the production complex.
In this example, "производственного" serves as an adjective describing the process, specifying it as related to production.
Улучшение производственного процесса требует анализа.
Improving the production process requires analysis.
Here, "производственного" modifies the department, denoting its role connected with production tasks.