I think the point made above is that it's enough for implementation(X) < implementation(Y) in order to sway some people to technology X. Rapid prototyping is an

I think the point made above is that it's enough for implementation(X) < implementation(Y) in order to sway some people to technology X. Rapid prototyping is an example of this, since the time-value of feedback is higher before the product is well defined.