I am curious what drives peoples choices as to when to chop/harvest. Early to get a city up and running or late to maximize late game production. I seem to always struggle with when is the best time to do it.
Do you base the decision on victory condition?
As
@Victoria mentioned in another thread, the chop yield scales with game progress in the same way as district costs scale. (3 chops = 1 district)
Base yield of a forest chop is 20 at the beginning of the game and becomes 200 when your progress in Tech/Civics hits 100%, while base costs of a normal district is 60 (=3 x 20) which increases to 600 (= 3 x 200).
Afaik Civ 6 features different types of Production Costs :
- Districts (1000%) and Traders (400%) scale with progress,
- Settlers (80 + n x 20) and Builders (50 + n x 4) scale with produced number of their type,
- buildings, military units, wonders have fix costs.
Except for districts and wonders, you can rush buy everything with Gold.
Right at the beginning of the game your first builder costs 50 production and an early chop yields 21 production at a cost of 50/3 = 17, this is a netto yield of 4 production.
So building a builder in the same city where you chop is only usefull if you have a significant netto yield, want to prebuild to rush production and do not need the forest tiles for normal production.
Builders can be quite usefull to transfer production from one city to another (if there are the forests tiles to spare).
Using builders for chopping means that you use more builders throughout the game and so increase the costs of builders. (50, 54, 58, 62, ...)
Imagine you have a short game where you need only 2 builders for improvements which cost you 50 + 54 = 104 production. Now you decide to use the first builder (50) for (optional) chopping. You still need 2 builders which cost you now 54 + 58 = 112 production instead of 104 without chopping. In the end the early chop costed you 58 production instead of 50 ...
(If you usually end the game with more money than you can spend, the increase in cost does not really matter.)
For economic chopping you should use builders with 4 or 5 charges ...