The Quantum Leap: Next Generation

The advantages of using a single-source supplier include:
Being able to focus on that one source
Consolidating volume
Consolidating by commodity
Maintaining better control
Monitoring quality and supplier performance
Also, a supplier that gets the whole loaf instead of a slice is much more inclined to keep the buyer happy. The buyer has more time to focus on a smaller number of suppliers and can better monitor performance and contract flexibility.