Sam Walton on Innovation

Hypermart USA was Walmart's late-1980s experiment with the European hypermarket — a format modeled on the French retailers Auchan and Carrefour and on the Midwestern chain Meijer — attempting to combine groceries and general merchandise under one roof at a substantial discount. At its peak the demonstrator project operated four locations, two in Texas and one each in Kansas and Missouri, each exceeding two hundred twenty thousand square feet, roughly forty-two thousand square feet larger than an average Walmart Supercenter three decades later. The stores packed in mini-malls, food courts, arcades, banks, and kiosk operations. The prototypes were originally to be named Wal-Mart Supercenter, but the name was shelved for Hypermart USA and later recycled for the smaller format. The Garland, Texas prototype opened December 28, 1987, and drew twenty thousand visitors on launch day, complete with an in-store tortilla factory, a supervised play area, a fifteen-cent coffee deli, and fifty-eight checkout stations.

Vendor-managed inventory, the practice in which a supplier takes responsibility for optimizing the stock a retailer holds, became one of the successful business models used by Walmart, Procter & Gamble, and other large-format retailers. Under these arrangements suppliers work from electronic data interchange formats and statistical forecasting methods to time replenishment themselves, with variations including consignment structures and scan-based trading, in which the retailer effectively houses the product and pays only as it sells. The model's significance for Walmart was strategic as much as operational: converting suppliers from adversarial bargaining counterparties into co-managers of inventory compressed costs across the entire chain and deepened the switching costs of the relationship. Oil companies use similar systems to manage gasoline inventories at the service stations they supply, and Home Depot applies the technique with its larger suppliers. Retail Link, the data platform Walmart began developing in 1985, supplied the technical substrate that made such arrangements practical at national scale.

Glass's most consequential technical project began in 1985, two years before the satellite network it would eventually ride, when, alongside Rob Walton, he managed the development of Retail Link — Walmart's proprietary trend-forecasting software that exposed the company's store-level sales data to its suppliers. The system turned vendors from order-takers into co-managers of inventory, an arrangement built on the vendor-managed inventory practices Walmart developed with major suppliers using electronic data interchange and statistical forecasting. Retail Link matured into the connective tissue of Walmart's supply chain, the commercial interface of the satellite network completed in 1987, and the model other retailers copied for decades afterward. Retail Link's data feeds let suppliers see store-by-store movement and plan production accordingly. Glass's later ownership of the Kansas City Royals applied the same cost discipline to baseball, with results the team's fans found considerably less impressive than the retail record.

Walmart's technological edge accumulated in deliberate layers. By the company's twenty-fifth anniversary in 1987 it maintained offices to track inventory and sales and to send instant communication to its stores, and by 1988 it had equipped ninety percent of its stores with barcode readers to help manage the movement of enormous inventories. Each layer compounded the last: point-of-sale data fed the satellite network completed in 1987, which fed the distribution centers and the trucking fleet, shortening reorder cycles that competitors still measured in weeks. The company treated information infrastructure as a capital investment in competitive position rather than as overhead — an approach later extended to vendors through proprietary software that shared Walmart's sales data with its suppliers, turning the supply chain itself into a proprietary asset. The point-of-sale scanning layer was less glamorous than the satellite constellation but more consequential for daily operations.

In 1987 Walmart completed a twenty-four-million-dollar satellite network linking every store to Bentonville with two-way voice and data transmission and one-way video communications — at the time the largest private satellite network in existence. The system let the corporate office track inventory and sales and communicate instantly with stores, collapsing the information lag that had always separated headquarters from the selling floor. Combined with the barcode readers that reached ninety percent of stores by 1988, the network gave Walmart a persistent structural information advantage over regional competitors still working from weekly paperwork. It was the technological expression of Walton's logistics obsession: the founder who scouted towns from a second-hand airplane spent his final decade wiring the whole company together from orbit, and the investment kept paying out long after his death. Centralized buying had already run through the Bentonville home office since 1970, when the first distribution center opened there.