Concept
Version 6
Created by Boundless
Perishability
Delta Airlines
The transportation service that an airline ticket entitles a customer to cannot be stored, saved, returned, or resold after the flight. It is a perishable entity.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Delta Air Lines - N757AT - Flickr - skinnylawyer."
http://commons.wikimedia.org/wiki/File:Delta_Air_Lines_-_N757AT_-_Flickr_-_skinnylawyer.jpg
Wikimedia
CC BY-SA.