Pittsburgh Katz is famous for its one year MBA program that has been operating more than 40 years. Since it is a one year program, it tends to have high ROI and rapid payback.
https://www.katz.pitt.edu/mba_oneyear.html
The school also offers a two year MBA and various dual degrees.
FT2005 ranked Pittsburgh # 70 worldwide- near Tulane, Temple, and Wake Forest.
FT 2004 ranked it #56 worldwide-near Indiana, HEC Paris, and Wisconsin.
FT2003 ranked it #72 worldwide- near Wisconsin and Thunderbird.
EIU 2003 ranked it #66 worldwide- near Thunderbird and Western Ontario.