Piggly Wiggly let customers serve themselves

Grocers in the 1910s ran on full service: a customer read a list to a clerk, who walked the stockroom gathering each item. It was slow, and the labor cost scaled with every customer served, at a time margins on packaged food were already thin. Saunders, a Memphis wholesaler and grocer, wanted to cut that cost, but a store that simply hired fewer clerks would just mean longer waits and worse service.

His answer restructured the transaction itself. He patented a store design — turnstile entry, a fixed aisle path past shelves of priced, branded goods, checkout at the exit — that let the customer do the browsing and picking a clerk used to do, and marketed it as a novelty rather than a downgrade: shoppers could see and touch everything in the store instead of asking for it.

Clarence Saunders patented a store layout that turned shopping inside out: customers entered through a turnstile, walked a maze of aisles stocked with priced, pre-packaged goods, and picked their own items before paying at a checkout — the clerk's job shifted from fetching one customer's list to stocking shelves for all of them.

Redesigned the store so customers fetched their own items: turnstile, priced aisles, checkout turned per-customer clerk labor into one-time stocking cost.

Full-service labor cost scaled with each customer, since a clerk fetched each item individually.

Open shelves with priced goods let customers pick items without clerk help.

A controlled path and checkout concentrated labor into stocking and ringing up, not fetching.

Marketing it as a novelty made customers willing to adopt the self-service format.

When a service cost scales per customer, redesign the experience so customers do the work themselves, converting per-customer labor into one-time preparation.

The first Piggly Wiggly opened in Memphis in September 1916; Saunders began franchising the format within a year, and by 1923 the chain ran over 1,200 stores doing roughly $100 million in groceries — the self-service format every supermarket since has copied. Saunders was not the literal first to try self-service, but his patented, franchisable version was the one that scaled — over 1,200 stores by 1923, and the template every modern supermarket, from Kroger to Walmart's grocery aisles, still runs on.