Learn Russian: Мы сделали вывод, так как итог хороший. - We made a conclusion, since the result is good.

Both introduce a reason, but they have slightly different focuses. Потому что directly answers the question "Why?" and puts the main emphasis on the reason itself. Так как is closer to the English "since" or "given that"—it treats the reason as background information or an already known fact used to justify the main action (Мы сделали вывод).

Is сделать вывод a set phrase?

Yes, сделать вывод is the standard, natural collocation for "to draw a conclusion" or "to make a deduction" in Russian. You might also hear прийти к выводу (to come to a conclusion), which implies a longer thought process before reaching the end result.

Both вывод and итог can translate to English words like "result" or "conclusion." How are they different here?

Вывод refers to a logical conclusion or deduction—something you figure out using facts. Итог, on the other hand, is a final outcome, tally, or summary (like the final score of a game or the results of a test). In this sentence, the logical deduction (вывод) is being made because the final outcome (итог) is good.

Do I always need to put a comma before так как?