Meaning
Signal propagation delays that occur when transmitting data across wide-area communications links affect the speed of transaction verification between distributed registers and the central database. The impact of wan network latency determines the maximum speed of payment processing and inventory updates across a retail network. This delay is determined by the physical distance between the store and the server and the quality of the telecom connections.
Checkout Efficiency
High transmission delay increases the time customers spend waiting at the checkout counter for payment authorization. If a terminal must wait several seconds for a central server response, queue lengths at the cash register increase. This delay can lead to frustrated customers and lost sales.
Offline Strategy
Minimizing the impact of communication delays requires the deployment of local caches and database systems that can process transactions offline. Store software must be designed to handle delayed responses without crashing or locking up the point-of-sale interface. This approach ensures that the checkout line continues to move.
Service Levels
Service contracts with internet providers must specify maximum delay thresholds to ensure that payment applications run smoothly. If the provider fails to meet these latency limits, the merchant may experience transaction timeouts and lost sales. The service agreement must therefore include financial penalties or credits to compensate the merchant for these service interruptions.
This protection is necessary for maintaining reliable point-of-sale connections across a distributed national retail network.
