If you scale up a project where the design process alone takes 90 days, then building takes 180 days and then UAT another 30 to 60 days a project that is designed say between Jan and Feb goes to market in in Sept or October. That is being generous, in some clients things we designed over a year ago are just getting to market. In many ways the design is obsolete as it hits the market.
via Shipping an Empty Box – UX in the Enterprise | Teehan+Lax.