actually there is limit to production. assemblers and others cannot produce more than double, when you reach higher productivity machines start backloging. so even if you remove production module, you might still see, they produce at higher speed (2nd bar).Xeanoa wrote:I favour a different direction.
Productivity modules can be used in too many processes. Imo, they should not be able to be used for intermediates, and only for the very find processing steps, such as iron ore > iron, but not even for iron > steel. That way, they can't multiply with themselves. Also not in mining. Literally only one step per resource.
And, maybe, a cap to productivity, like there is a cap to energy/pollution reduction. 100% seems fair enough.
Allows you to double all your resource yields, which is still huge, but you cannot make 2 million tunsten plates out of a small ore field.
at least that's what of devs said, when someone reported as bug, that his factory produces surplus stuff after removing productivity module (you can search for that thread in "not a bug" section).
technically, if you have 400% productivity (total), you will still make 4 items instead of one (material wise), but time wise, you will not build more than 2 items at time. so you will be just stacking your item backlog. eg. going past 200% productivity does not benefit you in terms of immediate result.