Walmart has been working with IBM on a food safety blockchain solution and today it announced it’s requiring that all suppliers of leafy green vegetable for Sam’s and Walmart upload their data to the blockchain by September 2019 .

Most supply chains are bogged down in manual processes. This makes it difficult and time consuming to track down an issue should one like the E. coli romaine lettuce problem from last spring rear its head. By placing a supply chain on the blockchain, it makes the process more traceable, transparent and fully digital. Each node on the blockchain could represent an entity that has handled the food on the way to the store, making it much easier and faster to see if one of the affected farms sold infected supply to a particular location with much greater precision.

Walmart  has been working with IBM for over a year on using the blockchain to digitize the food supply chain process. In fact, supply chain is one of the premiere business use cases for blockchain (beyond digital currency). Walmart is using the IBM  Food Trust Solution, specifically developed for this use case.

“We built the IBM Food Trust solution using IBM Blockchain Platform, which is a tool or capability that IBM has built to help companies build, govern and run blockchain networks. It’s built using Hyperledger Fabric (the open source digital ledger technology) and it runs on IBM Cloud,” Bridget van Kralingen, IBM’s senior VP for Global Industries, Platforms and Blockchain explained.