How does it feel? To be on your own. With No Direction Home. Like a Complete Unknown. Like a Rolling Stone.
— Robert Zimmerman (Born May 24th, 1941, professionally known as Bob Dylan)
Without a Plan, a Roadmap, a Strategy, a description of Done in units of measure meaningful to the decision makers, all adjusted for uncertainty— both reducible and irreducible and no estimates of the impact of those risks on your project— you're proceeding into the complete unknown and likely don't even know it.