This is the 15437th most frequent Russian word.
предварительное
Preliminary.
Here, "предварительное" is an adjective modifying "обсуждение", indicating that the discussion occurred in preparation for a main event or decision.
Мы провели предварительное обсуждение вопроса.
We conducted a preliminary discussion of the issue.
Here, "предварительное" is an adjective modifying "мнение", indicating that the opinion is formed in an initial or preparative stage before thorough analysis.
Его предварительное мнение основано на поверхностных данных.
His preliminary opinion is based on superficial data.
In this sentence, "предварительное" acts as an adjective describing "тестирование", suggesting that this testing serves as a preparative measure before the main event.