Just as a pair of jeans can be hemmed without destroying the garment, every process in the model must be "terminally adjustable." You cannot re-cut the entire cloth, but you can adjust the length. In practice, this means high-level architecture is locked, but execution-layer variables remain open.
The core of the Blujeanne appeal lies in its name—a play on the timelessness of blue jeans and the effortless Parisian chic often associated with the name "Jeanne." A Blujeanne model typically embodies: