How is the final weight of a Requirement calculated in Tosca?

• A. Weight = 2^Damage class * 2^ Frequency class
• B. Weight = Damage class + Frequency class
• C. Weight = 2^(Damage class + Frequency class)
• D. Weight is the sum of squares of Damage and Frequency classes

Answer: (A)

The weight grows exponentially because each factor—Damage class and Frequency class—doubles the weight for every level. You combine these effects by multiplying two powers of two: 2 raised to the Damage class, multiplied by 2 raised to the Frequency class. This captures how both aspects independently increase the weight, and it's mathematically equivalent to taking 2 to the power of the sum of the two classes (2^(Damage + Frequency)).

For example, with Damage class 3 and Frequency class 2, weight = 2^3 * 2^2 = 8 * 4 = 32, which equals 2^(3+2) = 32. This shows why the product form is used—the contributions from both classes compound multiplicatively.

Avoid representations that simply add the classes or square terms, since they don’t reflect the same exponential growth pattern.