All Crafting building pages, or alternatively the worker system page, probably below the skills section.
Information Missing
Each time they craft an item, workers have a small chance, based on their skills, to unlock the ability to craft that same item using fewer materials. This does not apply to all items, and never applies to items that can be converted back into their ingredient items, for example blocks of iron and coal.
Page(s)
All Crafting building pages, or alternatively the worker system page, probably below the skills section.
Information Missing
Each time they craft an item, workers have a small chance, based on their skills, to unlock the ability to craft that same item using fewer materials. This does not apply to all items, and never applies to items that can be converted back into their ingredient items, for example blocks of iron and coal.