Just wanted to share this interesting link - "How Our Mail Gets to Us"
This chart compares FedEx, UPS, DHL and USPS in terms of employees, shipping cost, annual revenue, operating facilities, fleet, working conditions, and daily volume. According to reference, the data is from Fortune magazine.
Value Chain Architecture is an interesting new concept in field of logistics. This comparison shows how different companies operate in the same business with completely different network structure and performance.