Right out of the gate we would like to highlight that the inspiration for Supplier Risk Assessment and Monitoring came from the paper below
Supplier risk assessment and monitoring for the automotive industry
Jennifer V. Blackhurst, Kevin P. Scheibe and Danny J. Johnson
Logistics, Operations and MIS Department, College of Business, Iowa State University, Ames, Iowa, USA
The above paper is a good read and the methodology seems to have been tested in a real supply chain setting.