1. Start of season Design
In each race of the current season your Chief Designer (CD) will bank a number of design points towards the starting design next season. The number of points will depend on the Level/Star rating of the CD and their strength and weakness attributes.
A CD the same level as the team (or a 5 star L19 CD to a L20 Team) should produce 16 dp per race, 3 dp in the Strength attribute, 1 dp in Weakness and 2 dp in the remaining 6 design areas.
So assuming a 20 race season, a single CD for the entire season strong in Handling and weak in Fuel Economy will produce a start of season design of:
Acc: 20 x 2 = 40
Brake: 20 x 2 = 40
Cool: 20 x 2 = 40
Down Force: 20 x 2 = 40
Fuel Econ: 20 x 1 = 20
Handle: 20 x 3 = 60
Reliab: 20 x 2 = 40
Tyre Economy: 20 x 2 = 40
Note 1: This is "core" design and will be modified to an extent depending on the Engine, Fuel and Tyre suppliers you use.
Note 2: This is also the season start design you will receive if you join a 20 race per season league during the break.
If you use more than one CD the design will be different. All you have to remember is that next season design points are generated every race and accumulated throughout the season. Again, assuming a 20 race season and 2 CDs the same level as the team, CD1 Strength Handling, Weakness Fuel Economy active for 15 races & CD 2 Strength Acceleration, Weakness Fuel Economy active for 5 races produces a next season start design of:
Acc: (15 x 2 = 30) + (5 x 3 = 15) = 45
Brake: (15 x 2 = 30) + (5 x 2 = 10) = 40
Cool: (15 x 2 = 30) + (5 x 2 = 10) = 40
Down Force: (15 x 2 = 30) + (5 x 2 = 10) = 40
Fuel Econ:(15 x 1 = 15) + (5 x 1 = 5) = 20
Handle: (15 x 3 = 45) + (5 x 2 = 10) = 55
Reliab: (15 x 2 = 30) + (5 x 2 = 10) = 40
Tyre Economy: (15 x 2 = 30) + (5 x 2 = 10) = 40
In both of the above scenarios the total core design is 20 x 16 = 320, the CD strength and weakness simply changes the way in which the design points are distributed.
CDs with lower levels/star ratings can significantly reduce your next season start design. Here Is a table I created for a 15 race season showing the effect of lower level CDs on season start design.
The above examples demonstrate the number of next season dp that are banked per race for a team competing in an Elite tier. The number of DP generated for Rookie and Pro tiers are lower in keeping with the lower design range. Here are the values per race for a team competing in each tier.
Where the result is not a whole number the game will round up.
E.g. 17 race season, Rookie tier, CD weakness: 17 x 0.25 = 4.25 which rounds up to 5.