You and I are either talking about very different kinds of specifications or very different kinds of product people. The product people I'm familiar with are co

You and I are either talking about very different kinds of specifications or very different kinds of product people. The product people I'm familiar with are completely incapable of creating a specification that is sufficiently detailed to implement without a lot of back and forth. Not because they're not good at what they do, but because what they do does not include defining requirements in sufficient fidelity for an engineer to act on.