Herbert Gintis argues in Why the Beliefs, Preferences, and Constraints Model? that humans are very good at maximising fitness despite decades of psychological results arguing that humans under certain circumstances do not decide wisely.
This is critical to keep in mind during the development of any vendor management system.
[...] Firstly, the Vendor Manager must establish clear aspirational goals for the supplier relationship. Once they have established the goals and tied remuneration to the goals, the environment is set for a flexible relationship that can change with the times. If the parties are focused on the aspirational goals, they are more likely to be flexible [1] [2] [3] and to demonstrate innovation. [...]