While I haven't had any real life interactions with these, I can think of a couple scenarios where it might make sense:

- Your company handles dangerous or highly regulated materials (prescription drugs, hazardous materials, etc.) and you are required to have controls in place to monitor your supply chain. - You deal with lots of vendors of questionable reputation, or have a history of graft, embezzlement, or other loss in your supply chain. For example, easily "misplaced" goods like cigarettes that need to be distributed to lots of retail locations.