The reason that BigCo never does capital-A Agile is that their release dates are fixed months ahead of time (to coordinate across the organization), and they wa

The reason that BigCo never does capital-A Agile is that their release dates are fixed months ahead of time (to coordinate across the organization), and they want to know what they'll actually be shipping in 6 months (again, to coordinate across the org). This makes the biggest two selling points of Agile - continuous release and rapid change - completely worthless. The only model I've actually seen in a large organization is for the dev team to throw together a barely-working prototype, then spend the next 6 months fixing all its problems while the Marketing, Sales, and Customer Service departments train up on the new software. And they'll find a way to call this "agile", because otherwise the developers will revolt.