I saw a great one slide corollary to this from a government program manager meeting once - basically, shorter time to first prototype drastically decreases over

I saw a great one slide corollary to this from a government program manager meeting once - basically, shorter time to first prototype drastically decreases overall program cost. I think a lot of this has to do with giving the customer less time in which to change their mind. Tangentially related to op - but, an interesting tangent nonetheless.