Industry Production - Up & Down

[Phil]

Hi - I'm sure this is a total noob question but what is it that causes, say, a mine to start making more or start making less per month? Not the % that they give you based on your score with them but their overall production. I had a mine go up loads and a fruit farm just disappeared altogether even though I was picking the fruit up.

Ta :)

[noctilucus]

The increase/decrease is partially random, partially affected by how much of its cargo was transported (formulas taken from the wiki):

- For an industry that has poor or no service (less than 60% of its cargo is transported): 33% chance of increase, 67% chance of decrease.
- For an industry that has good (greater than 60%) service: 67% chance of increase, 33% chance of decrease.
- There is no bonus for excellent service with default economy.

For industries that are not temperate terrain oil wells, there's a ~16.7% chance per month that a production change occurs.

[Phil]

Thanks for the detailed reply. :) Can I mod or adjust the "Excellent" to increase in the settings somewhere please?

[Raptor]

Originally posted by Phil:

Thanks for the detailed reply. :) Can I mod or adjust the "Excellent" to increase in the settings somewhere please?

Not 100% sure, but i would be guessing that this is hard coded into the game somewhere, which means you would have to be physically changing the game. Which technically you are free to do for your own purposes, but don't know how that would affect anything else.

[Phil]

Thanks. I've found that maintaining high levels of rating overall slowly causes the indie to trickle up. I saw someone playing a mod where production can be "Gung-Ho"

[POWER WITHIN USER]

I think I spotted downloadable content, a gamescript or newGRF that would cause industries to have maxed ratings.

As for your question, it's explained in
https://www.youtube.com/watch?v=oesqMKv11hI

though even with maxed ratings, in the tiniest map available I still had an industry with a constant 67% rating to shrink a couple times in a row until it eventually closed down.
oilwell in temperate map issue

[Raptor]

Originally posted by POWER WITHIN USER:

though even with maxed ratings, in the tiniest map available I still had an industry with a constant 67% rating to shrink a couple times in a row until it eventually closed down.

Was that industry an oil well?

[POWER WITHIN USER]

Originally posted by Raptor:

Was that industry an oil well?

Yes.
Actually ended up looking them up
https://wiki.openttd.org/en/Manual/Base%20Set/Industries/Oil%20Wells

[Raptor]

There was a bug in the original, that caused Oil Wells to drop production, even with excellent service.
There is Grf that you can download that fixes the production for them.

[eu]

The rules are a little messy, but, if you like to play with vanila industry and the production search for the wanaroo industry set mod, it wont change much, but you can make the rules for the production to go up or down more simple and it is a really cool mod.

Also, build company owner statue on every city that you are using its industry, it usually have the name of the city, like "city iron mine"

[Raptor]

Originally posted by eu:

Also, build company owner statue on every city that you are using its industry, it usually have the name of the city, like "city iron mine"

One thing that I don't think is explained in the manual properly, for the statue to have an effect, your stations coverage needs to include the statue. Otherwise it has no effect.