I see, thanks for clarification.
It's interesting because with tier 1 moldules it worked like I mentioned every time I lauched a rocket, like at least 5-10 times in a row.
Maybe that's why I got confused.

EDIT:
Oh I see each cycle is 1.16 progress (kinda) which is 43 * 1.16 = 49,88 but I need 50 to ...

Maybe I didn't understand the game correctly, but from my understanding productivity modules reduce the amount of resources needed to craft.

Obviously I put them in a rocket silo, who wouldn't?

I did this with Tier 1 Modules (normal quality) and put in 43 of each component to craft a rocket and ...