Originally Posted by rentalguy

Availablility is based on vehicles on the ground, booked reservations and scheduled returns. Then, depending on the location the system is set to book 15% over your available fleet to compensate for "NO SHOWS" or cancellations, which inevitably occur. This is usually sufficient to ensure everyone gets a car without having tons of cars left over, although the fleet mix may be off. To answer your question, if someone has to get "bumped", it will be a non E/C member (even though they potentially could have booked weeks ago and the EE booked it with 24hrs notice and over rode the system sell out). We try to avoid bumping anyone but it does happen on occassion. The same people that usually complain they had to wait for a car, are the same ones that keep their car rental longer than originally booked and never bother to call the location so they can extend it. That's when a location usually runs into problems, when the scheduled returns dont return as scheduled, and dont call to extend.

Hope that helps.