[mojzu]

I wouldn't disagree that decomposing a system in this way before implementation is a net positive, however I think different stake holders view plans like these very differently. If you discover partway through development that the library you planned to use for a feature will not work and as a result have to revisit your plan, then some stake holders see that as a failure or delivering late because to them the original plan was an iron-clad guarantee whereas to developers that's just an expected part of the process where not everything can be known ahead of time

[kqr]

Right, tracking success by the classic metric "percent of plan completed". That's a separate problem, I would think!