Checkout choice shaped the installation
TXB began with new stores and extended the approach to remodels where the layout allowed it. The stores combined convenience retail with freshly prepared food, so checkout had to serve customers making different kinds of purchases. The resulting format retained employees at the front of the store instead of making self-service the only available path.
That layout is central to understanding the project. Adding terminals increases the number of places where a transaction can begin, but customers do not arrive with identical baskets or identical needs. A staffed option gives the operating format somewhere to accommodate assistance. The installation therefore changed the allocation of checkout capacity without requiring every shopper to adopt the same behavior.
The new lanes attracted a substantial share of transactions
Across the stores described in the project account, approximately 40 percent of transactions used self-checkout. Some locations reached about 60 percent. Self-checkout baskets were smaller than baskets handled at traditional checkout points.
Those results show that the two checkout formats attracted different transaction mixes. They also explain why an average across the estate cannot describe every store. A location where self-service handles most transactions has a different balance of demand from one where staffed checkout remains dominant. The project produced evidence about customer choice at operating stores, rather than relying solely on the capacity implied by the hardware count.
The smaller baskets are especially relevant to interpretation. A higher transaction count at one type of lane does not establish that it processed an equivalent share of sales value. Transaction share, basket value and total store revenue answer different questions. Treating them as interchangeable would obscure what the deployment actually demonstrated.
Staff remained part of the service model
TXB reported positive employee feedback and a positive revenue effect, without publishing a controlled revenue comparison. Its account described opportunities for staff to spend time on other customer-facing work. It did not establish a quantified reduction in labor hours or a measured change in queue time.
The operational significance is the relationship between the equipment and the remaining service work. A self-service terminal transfers some transaction entry to the customer. Assistance, exceptions and the wider store experience still require people. In this project, the retained staffed lanes made that relationship visible in the physical design. The format created additional choices while preserving an established way to resolve a purchase with an employee.
Adoption informed the next design decisions
TXB was considering changes to counter placement and further installations at existing stores. Those were next steps in the account, distinct from the completed deployments and measured adoption.
Cartennas’s assessment is that the useful result was a working mixed checkout format with observable customer behavior. The case supports a more precise conclusion than simply declaring self-checkout successful: shoppers used the added option extensively, the share varied by store, and staffed checkout continued to serve a different basket mix. Those differences gave the retailer practical evidence for subsequent layout decisions.