# Moon goo refining yield formula

I am working with this post from an old post from oct 2017 giving the following formula for calculating moon refining yield:
Refining Yield Modifier * (1 + (Structure Bonus/100) * Structure Security Modifier * (1+ (Refining Skill level * .03)) * (1+ (Reprocessing Efficiency skill level * * (1+(Ore specific/ice processing skill level * .02)) * (1 + (Processing Implant Percentage/100))

But no matter how I apply that formula I get all the wrong results. So is there a better formula or am I just using this one wrong?

Here are some test cases.
Skills Processing 5 (x1.15), Reprocessing Efficiency 5 (x1.1), all Moon ores 4 (x1.04). no implants.
Tatara T1 reprocessing rig in nullsec
50% base, +4% for being tatara, +1% from rig shoudl be 55% base. in game it shows 59%. If I factor in the 1.12 bonus for nullsec into the base then I get (50+4+1)*1.12=61.6
So right now I cannot even determine how the base yield is figured.

But assuming I take the in game value of 59% and I apply my skills I get 591.151.1*1.08=80.6 but game says 81.2

I get similar results when testing on an unrigged athanor I also own and several other structures of various sizes and rig configurations some of which I own or have verified their rigs with the owners.

so I am totally lost here. been at this since Saturday and been asking in game but everyone who has looked at this cant make any more sense of it then I can.

Can someone point me int he right direction here with the right formula or point out the error in how I am using this formula? I am sure its some stupid mistake on I my part I just cant seem to figure it out.

Your problem in this formula is that you’re missing some parentheses, try this:

BaseYield = 50 (%), 51 if T1 rig and 53 if T2 rig. or if you will (50 + 1 or 3)
SecurityModifier = 1x in HS, 1.06 in LS and 1.12 in Null/WH.
RefineryMod = 1.02x if Athanor or 1.04 if Tatara.
ImplantMod = 1.01x, 1.02x or 1.04x
SkillA (Reprocessing) = 1.03x - 1.15x
SkillB (ReprocessEfficiency) = 1.02x - 1.1x
SkillC (OreReprocess) = 1.02x - 1.1x

Formula: (50 + RigMod) * RefineryMod * SkillA * SkillB * SkillC * SecurityMod * ImplantMod
Yielding (Athanor in Null, skills @ Lv.5 + 4% implant): (50 + 1) * 1.02 * 1.15 * 1.1 * 1.1 * 1.12 * 1.04 = 84.315%

This is because the yield is calculated multiplicative not additive as you have assumed. (50+1) * 1.04 = 53.04% * 1.12 = 59.405%

In regards to how the Base yields is done, excluding all the various bonuses, with no rig it is 50%, then the rig(s) simply replaces that with it’s own corresponding base yield 51% or 53% for Tech 1 and Tech 2 respectively. Hence why you can just do a simple calculation like this 50 + RigMod, where RigMod = 0, 1 or 3.

Refinery Yield = (50 + RigMod) * (1 + (Structure Bonus/100)) * Structure Security Modifier * (1+ (Refining Skill level * .03)) * (1+ (Reprocessing Efficiency Skill level * .02)) * (1+(Ore specific/ice processing skill level * .02)) * (1 + (Processing Implant Percentage/100))

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ok here is what I come up with:
T0 athanor, so no rig, same skills as I listed above:
50% (base) * 1 .02 (athanor) * 1 (no sec bonus since that comes form rig) * 1.15 (reprocessing V) * 1.1 (reprocessing efficiency V) * 1.08 (exceptional moon processing 4) * 1 (no implant) = 69.68%
ok so that comes close as the actual in game is 69.70%. so rounded up to nearest tenth here

Now on to the tatara case which I know to be t1 rigged:
51% (base+rig) * 1 .04 (tatara) * 1.12 (nullsec) * 1.15 (reprocessing V) * 1.1 (reprocessing efficiency V) * 1.08 (exceptional moon processing 4) * 1 (no implant) = 81.16%
in game it shows 81.20% so rounding up again.

OK this seems to work a lot better now that I am doing it this way. Thanks. Now to apply this to other structures and see if I get the correct numbers but it looks promising.

followup: my spreadsheet is now accurate across all structures that I can confirm rigs for and now I can also tell what rigs are on any other stations by looking up the numbers in this spreadsheet
Thanks for pointing out my mistake!

You’re most welcome This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.