Analytic Hierarchy Process (AHP)

Link Wikipedia
http://en.wikipedia.org/wiki/Analytic_Hierarchy_Process

PDF file with the theory
mdm.gwu.edu/forman/DBO.pdf

A simple powerpoint with example
cispom.boisestate.edu/opermgt345tfoster/ahp.ppt

An example decision -- spreadsheet
ecolu-info.unige.ch/~dubois/Mutate_final/Lectures/Lect_1_1_2/site_criteria.xls