[cudgy]

Have 2 teams of 10 develop the same thing and pick the best one?

[dizhn]

The result would still not be guaranteed and one of the teams would have terrible morale at the end. (The other one too probably since there's a 50 percent change they are working for nothing)

[nathants]

teams of 2 or 1, self selecting. sometimes double up and compete on the same project with multiple implementations.