“Software is so vital to military systems that, without it, most could not operate at all. Its importance to overall system performance and the generally accepted notion that software is always inadequate makes software the highest risk item and must be steadfastly managed...Failure to address risk has been the downfall of many DoD acquisition programs. The system component with the greatest inherent risk has historically been software.” - Former US Deputy Assistant Secretary of the Air Force, Lloyd Mosemann
Risk Management is how Adults manage projects (and products) - Tim Lister
Risk management means making decisions in the presence of uncertainty - reducible and irreducible. Making those decisions means making estimates since the impact of those decisions is uncertain.
#NoEstimates willfully ignores these principles and is only applicable to de minimus projects. So if you work de minimis projects, #NoEstimates is for you. If you don't ignore any advice about how you can decide without estimating in some form