Advancements and investment

[Wannabe]

I’ve read it over and over but I’m still confused: how does increasing research investment affect changes in Advancements? I would expect more factors going towards a certain technology would reduce the time to advance. But I’m not seeing that.

(I’m only a few turns in so maybe I’m being impatient but I’d rather not play for weeks before I’ve been sling something wrong the whole time!)

[YueJin]

Every point in a research field gives a chance to increase progress to the next tier every turn. A 1939 tech can have have up to four points put in it which will have a high chance to move towards the next level. When it reaches 1940 the chance to progress decreases but one more point can be spent on it. There's a lot of randomness to it and you might find that even though you put seven points into one area, another where you put only four points is progressing faster.