Checkout optimisation software such as nShift gives retailers a practical way to present home delivery, store collection, lockers and pickup points as one coherent choice, without hard-coding every carrier into every storefront. That is what turns delivery options at checkout from visual design into a workable delivery promise. Operations confirms the service is available for the relevant baskets, locations and cutoff times, ecommerce sets the presentation, customer service watches for a change in the questions shoppers ask.