It seems like right now planner makes blueprints with just quality modules. In practice the math is a bit more complicated - adding productivity modules, if supported by the recipe can make the whole cycle more efficient. Made more complex by having to support modded quality tiers and modded modules :)

Did you look into that?

https://wiki.factorio.com/Tutorial:Quality_upcycling_math

For the moment all the machines get quality modules except the last one who gets productivity modules if supported (there is also a selector option where you can define if last machine gets productivity/speed/efficiency modules)

I have made an analysis about that, it can be implemented but I need to think about an UI to make it user friendly

That would be a checkbox something like this:

[ ] - use quality and productivity modules in intermediate steps

With hover explaining the situation :)

This fits well because I'm preparing 1.0 release, it will contain:

• Config options to configure number of columns (you can say for ex: I want 4 columns for common, 2 columns for uncommon)
• Display some stats like probabilities and time for the output
• And mostly like this your proposal of optimizing module placement

I think this will make the mod complete, so I'll version it as 1.0, idk what can be added more,
The problem is that this will heavly rely on this new function: https://lua-api.factorio.com/2.1.17/classes/LuaQualityPrototype.html#get_roll_chances which only exists after 2.1.13 , so idk if all this will be able to be ported to Factorio 2.0

Is taking shape: https://imgur.com/a/91T7R71

Nice! Will it calculate the best ratio to use? It changes depending on available modules, slots, researched recipe productivity, etc.

Hey,

It was released now in 1.0,

And yes, it computes the best ratio according modules quality and machine slot counts,

There is now also a new stats block where you can have an idea of the output!

Check out mod page again because there is much more info now!

Congrats! I'm one planet away from unlocking legendary quality - and that's where fun begins :)