After much brainstorming, I have refined my ground unit model. The focus is on tanks for now but the infantry model will be incorporated pretty soon.
About the files:
1) WWII Europe - SFB - Global Ground Unit Tech path v1.12
This is the technology tree and model for tank and gun. Square represents technology that can be researched. Balloon represents also a technology that can be researched but it will also unlock units. What units are unlocked depends on what technologies you have and what units are enabled for your country (see next point for more info on this).
2) Grid - Germany - Tank vs Gun caliber
The grid shows all possible combination of tank + unit type + gun caliber but the 'X' shows specifically which ones are enabled for Germany.
With this grid, we can then modelize every country units.
For example, in order to get Medium tank variant II with Basic medium gun; you'll need the following technologies: Medium Tank variant II (and its predecessor Medium Tank variant I + Medium Tank Design + Light Tank Design) and Basic Medium gun.
To get Heavy tank destroyer variant I with Advanced Heavy gun, you'll need: Heavy tank variant I (and its predecessor Light tank design + medium tank design + heavy tank design), Heavy tank destroyer design (and its predecessor Light TD design + Medium TD design) and Advanced Heavy Gun (and its predecessor basic heavy gun + improved heavy gun)
3) Grid - Definition - Gun caliber effect
This grid shows the modifier that each gun caliber gives. Gun caliber has an impact against infantry and/or tank.
4) Grid - Germany - Units stats example
This is an example of what germany ground units will look like with this system. Base strength values will need some fine tuning, just consider them as a starting value in order to be able to make some comparison between the various units.
The column Gun effect shows the impact of the gun caliber on the unit performance against tank/infantry unit. Type effect shows the impact of the unit type (Tank Destroyer,Anti-tank,Assault-Gun) on the unit performance against tank/infantry unit. The column Final strenght gives the strength values against tank and and against infantry (prior to defenders bonuses due to terrain, forts, cities and such).
Comments and feedback appreciated and required
