What is a service and why does its place matter?
A service helps people but does not make a thing. Shops, clinics, banks, schools, delivery companies and warehouses are services.
Most services need customers to come to them, or need to reach customers quickly. So the place decides if they earn money or close.
In the 3D, each dot is a home. Watch how the best shop place changes when we change one thing at a time.
Customers: range and threshold
Range is the farthest distance people will travel for a service. A milk shop has a short range (a few hundred metres). A big hospital or a furniture mall has a long range (many kilometres).
Threshold is the smallest number of customers a service needs to earn enough to stay open. A tiny shop needs few customers. A big supermarket needs many.
Rule: a service can survive only if the number of people inside its range is at least its threshold. In step 2 the circle held too few homes, so the shop lost money.
Rent, roads and rivals
Land cost (rent). Places with many customers, such as the town centre, have costly land. A shop owner trades more customers for more rent.
Access. Shops do well where roads, bus stops or stations bring people. A shop on a crossroad can be reached from four directions.
Competition. A rival takes some of your customers. Yet shops that sell things people compare, such as clothes, mobile phones or cars, often group together in one market street. Buyers like to compare, so a cluster pulls in more people for everyone.
Shops that sell daily needs, such as milk and vegetables, spread out so that each one has its own homes nearby.
Logistics: warehouses, ports and distribution centres
Logistics means moving and storing goods so they reach shops and homes on time. A warehouse keeps goods. A distribution centre sorts them and sends them out.
Customers do not visit warehouses. So they need not be near homes. They look for three things:
- Cheap, flat land with space for large buildings and many trucks.
- Fast links: a highway junction, a railway line, a port or an airport.
- A short trip to the shops and homes they serve.
This is why many warehouses stand on the edge of a city beside a ring road. Goods for the whole city arrive and leave without driving through crowded streets. Food that spoils needs a cold store, so such places also need steady electricity.
How service locations change
- New roads and metro lines make a place easy to reach, so shops move there and the rent rises.
- Growing towns bring homes to new areas; new shops follow the homes.
- Cars and fast transport let people travel farther, so the range gets longer and small shops far from the centre lose customers.
- Online shopping moves the 'shop' to a phone screen. Fewer people walk to a shop, but more parcels leave warehouses, so logistics hubs grow near highways and airports.
- Out-of-town malls appear where land is cheap and parking is easy; the old town centre may lose shops.
Try it
In the 3D, drag the Walking range slider and count green homes. Then drag Shop position to the edge and back to the middle. Find the place where the shop earns enough. Then tick Rival shop and see the customers split. At home: stand at your nearest shop and count how many homes are within a 5 minute walk. Would a second tea stall fit here?
Key formulas and definitions
- Range = the farthest distance people will travel for a service
- Threshold = the smallest number of customers a service needs to earn enough
- A service survives when: people inside its range is at least its threshold
- Short-range services (milk shop) are many and small; long-range services (hospital, mall) are few and big
- Warehouse place = cheap land + fast road, rail, port or airport + short trip to its shops
Worked examples
1. A tiny vegetable shop needs 14 homes inside its range. In a village, a circle around a lane holds 9 homes. Will the shop do well? What can the owner do?
9 is less than the threshold of 14, so the shop will earn too little. The owner can move to a place with more homes (like a lane near the crossroad), or sell more kinds of daily goods so that each home buys more, or wait until more homes are built.
2. Why do mobile phone shops stand together in one market, but milk booths are spread across all colonies?
People compare prices and models of phones before buying, so they like a market where many phone shops stand side by side. Each shop gains because the market pulls in more buyers. Milk is bought every day close to home, so buyers will not walk far. Each booth needs its own homes nearby, so booths spread out.
3. A company builds a warehouse to supply a big city. Option A: in the old centre, rent very high, every truck is stuck in traffic. Option B: on the ring road beside the highway, rent low, free-flowing roads. Which should it choose and why? Give one risk of B.
Option B. A warehouse needs space and fast roads, not walk-in customers. Low rent and a highway junction cut the cost and time of every trip. A risk of B: if the ring road is blocked or the highway fees rise, deliveries to the far side of the city could be slow, so the company may add small local hubs later.
Common mistakes
- Thinking the best place for every service is the busiest town centre. Warehouses and big stores often do better on cheap land near a highway.
- Thinking rivals are always bad. For goods that people compare (clothes, phones, cars), a cluster of shops brings more buyers to all of them.
- Mixing up range and threshold. Range is how far customers will come. Threshold is how many customers are needed. One is distance, the other is a number of people.
- Thinking online shopping means location no longer matters. The shop moves online, but the parcels still leave from a warehouse, and its place still matters a lot.