Plan the complete counter, one device at a time

Start with roles, then models

Identify the selling screen, card terminal, scanner, receipt printer and cash drawer. Add label printing, a customer display, a kitchen device or a scale only when the workflow requires it. Record the exact model and connection for anything you own. Include device operating system, browser or app requirements and the network it will use; a product family name alone is not enough.

Separate reuse from confirmed compatibility

Mark each device as owned, to purchase, leased or awaiting confirmation. For reuse, ask the provider to verify the complete combination rather than just the connector. Shopify, for example, publishes supported hardware by category. Other systems have their own conditions. VoVi’s browser approach can make existing devices worth testing, but it does not establish a universal certified hardware list.

Add one acceptance test per device

• Scanner: correct item, variant and quantity from your real labels.
• Printer and drawer: readable receipt, required opening behavior and recovery after reconnection.
• Card terminal: successful payment, decline and refund through the chosen provider.
• Scale: exact instrument, units, tare and label behavior, with supplier confirmation.

Budget for ownership as well as purchase

Count stands, cables, power, consumables and replacement arrangements. Decide who supports each component and what staff do when it fails. A leased terminal may carry obligations that survive a software change. Keep your final model list and test evidence with the quote, so a substituted device is reviewed before it arrives at the store.