Simulated Evolution (continued)

We must also define a fitness function.

Given an individual, we must assess how good a solution it is so that we can rank individuals. This is usually a real number.

For example, one can give a subjective judgement from 1 to 5 for the dish prepared with the recipe 2-1-4.

Similarly, the length of the route in the traveling salesperson problem is a good measure, because the shorter the route, the better the solution.