Taking a clue from NightHiker and his suggestion to peruse the fire center site, thanks for the link, I came across a pfd at the bottom of the reference materials page that seems to directly address the issue:
http://www.nifc.gov/wfstar/safety_essays/Alexander_VICFFR_keynote_address.pdfIt assumes that your efforts at normal avoidance have failed and that entrapment or being burned over is likely. Given that; what are your options?
The four main options listed are:
Retreat from the fire and reach a safe haven.
Burn out a safety area.
Hunker in place.
Pass through the fire edge into the burned-out area.
The paper gives considerable detail on each and how they overlap, makes suggestions on technique, and gives historical examples of people who made it and many that didn't.
Tough call to make. Tougher still because even if you make the best possible decision there is no guarantee that all, or any, will make it. It doesn't say it but it seems clear that given a lack of grace and luck not every situation is survivable. Survivors are often very badly burned.