I'm guessing: priority boarding and families with little children first, everybody else second regardless of allocated seat? Structured boardings have always failed on account of most passenger not paying any attention whatsoever and showing up when they shouldn't. It is generally quicker to let them sort themselves out on board than trying to herd them at the gate.
There have been scientific studies (with actual tests and everything) on which is the best way to board a plane, but they all have the same inherent defect in that they assume that people will actually do as requested. Experience shows that this is completely unrealistic, and the time savings with the best method didn't amount to much anyway.
Last edited by Dg800; 3rd Dec 2012 at 12:49.