It doesn't take 12 years to purchase a helicopter based on a best-value, performance-based process. I think it does when you take three of four years just to write the specifications—very detailed specifications—in a lowest-price-compliant process.
Right off the bat, lowest-price-compliant with a detailed specification costs you five years. That's the maritime helicopter project. The Chinook project was not lowest-price-compliant. It was performance-based, best overall value, and it will be completed in far less than 12 years.