Now the last week has taught me that it's unwise to call ideas 'brilliant' or 'easy to implement', but nonetheless, check out my brilliant and easy to implement idea.
Factories should give a small boost to research in the relevant area. So an artillery factory should give a boost when researching army tech, a steel factory for researching industry, a factory which produces consumer goods like furniture could give a boost to commerce tech (lets just say they are finding out more on market dynamics), etc.
It could just be a small modifier, but would reflect reality and add strategic choice to the industrialisation of one's country.
Factories should give a small boost to research in the relevant area. So an artillery factory should give a boost when researching army tech, a steel factory for researching industry, a factory which produces consumer goods like furniture could give a boost to commerce tech (lets just say they are finding out more on market dynamics), etc.
It could just be a small modifier, but would reflect reality and add strategic choice to the industrialisation of one's country.