Factorio Forums

Hello,
I think I have a bug with quality:

I have a machine with 49.6% Quality. I would expect a production distribution of roughly:
500 tier 1
250 tier 2
125 tier 3
63 tier 4
63 tier 5

This is what the machine produced: Tested on: Only Space Age, no additional Mods installed.

NaB, see https://wiki.factorio.com/Tutorial:Qual ... cling_math

In fact you got lucky and made 51.4% quality items. And you got even luckier and made even more epic items than expected on average (which is always 10% of the previous tier). It's not the plant quality ratio from tier to tier!

The expected values are:

• 862 common items
• 849 quality items (49.6%), thereof:
  • 764 uncommon (90%)
  • 76 rare (9%)
  • 7 epic (0.9%)
  • 0 legendary (0.1%)

(give or take a few due to rounding)