[naval]

The problem is that there is an incentive to always pad estimates. By forcing a one-week schedule, you counterbalance that tendency, and make it possible to measure yourself more accurately. Despite this, I'd say that many of our projects fail, never ship, ship and have to be rolled back, or ship and have to be iterated 5 or more times until we get them "good enough." But it still beats taking 3 months to ship something interesting, which is the cycle most startups are on once they're out of an incubator or done with their initial release.