As others have said, this methodology exists in various forms already. It has a major practical problem: > The team does not say how long it will take. Instea

As others have said, this methodology exists in various forms already. It has a major practical problem: > The team does not say how long it will take. Instead, they say what they think they can deliver in the time allotted. If the team doesn't think they can deliver something that the business feels is non-negotiable, the two are at an impasse. The methodology gives no way to resolve this impasse. And this problem is exacerbated because the business will frequently be wrong about what they want and when they want it by, and the team will frequently be wrong about what's achievable by the given date. And both parties know this, and it starts to affect how they interact with one another when discussing dates and deliverables. And to make things even more confusing there's often some amount of unacknowledged deception. Sometimes when the date arrives everyone collectively just pretends that the thing has been delivered in full. Because it doesn't actually matter whether it has.