Hub-and-spoke distribution is a logistics network design where many smaller locations connect to one or more central hubs. Instead of every warehouse or store shipping directly to every other location, goods flow through a central sorting and consolidation point. This reduces the number of routes needed and can lower transportation cost, delivery time, and inventory complexity.
It matters because modern supply chains must move large amounts of freight quickly while keeping service reliable.
Key Facts
- Direct network routes between n locations: routes = n(n - 1)/2
- Hub-and-spoke routes with one hub and n spoke locations: routes = n
- Total delivery time often includes pickup time + hub sorting time + line-haul time + final delivery time.
- Consolidation factor = total shipment volume on a trunk route / average individual shipment volume
- Vehicle utilization = loaded capacity / total vehicle capacity
- Hub-and-spoke systems trade fewer routes and better consolidation for extra handling and possible hub delays.
Vocabulary
- Hub
- A central facility where shipments from many locations are received, sorted, consolidated, and sent onward.
- Spoke
- A route or regional location connected to a central hub in a distribution network.
- Consolidation
- The process of combining smaller shipments into larger loads to improve vehicle use and reduce cost per item.
- Line-haul
- The long-distance movement of freight between major facilities, usually using trucks, rail, ships, or aircraft.
- Last mile
- The final stage of delivery from a local facility to the customer or store.
Common Mistakes to Avoid
- Counting every spoke-to-spoke pair as a required route in a hub-and-spoke network. In a basic hub-and-spoke design, each spoke connects mainly to the hub, so the route count is much smaller than in a full direct network.
- Ignoring hub processing time when estimating delivery speed. Sorting, scanning, staging, and loading at the hub can add delay even when transportation distance is reduced.
- Assuming hub-and-spoke is always cheaper than direct shipping. It can be cheaper for many small shipments, but direct routes may be better for high-volume lanes or urgent freight.
- Placing the hub only at the geometric center of a map. A good hub location also depends on demand, road quality, labor, land cost, carrier access, and service zones.
Practice Questions
- 1 A company has 12 regional warehouses. How many routes are needed for a full direct network, and how many routes are needed if all warehouses connect to one central hub?
- 2 A delivery path takes 1.5 hours from a spoke to the hub, 0.75 hours for sorting, 3.0 hours for line-haul movement, and 1.25 hours for final delivery. What is the total delivery time?
- 3 A retailer ships daily to many small stores, but three store pairs exchange very large volumes every day. Explain why the network might use a hub-and-spoke design for most shipments while keeping direct routes for those high-volume pairs.