Custom POS Hardware: Write a Specification That Can Be Manufactured

Custom POS projects work best when each change has a reason, a drawing or specification and an acceptance test. Start by distinguishing available configuration options from new engineering. Branding, a different display, an added reader and a revised motherboard are not equivalent changes in cost or risk.

Define the change package

Record required dimensions, colours, artwork, interfaces, computing resources and mounting. List the supported application image and peripherals. Identify which requirements are mandatory and which may be met by a standard product. Ask the supplier to state exceptions and engineering assumptions rather than confirming an undefined request for a fully customized terminal.

Control approval milestones

• Approve drawings and artwork before making tools or production parts.
• Test a complete sample for fit, cooling, power and application operation.
• Review destination requirements and the effect of changes on existing evidence.
• Agree tooling ownership, minimum order quantities and engineering charges.
• Sign the reference build and substitution procedure before batch release.

Keep the custom product serviceable

Confirm standard spare compatibility and unique parts that must be stocked. Maintain revision records for repeat orders and agree notice before components become unavailable. A successful custom terminal is not merely distinctive; it can be reproduced, diagnosed and repaired without depending on undocumented knowledge from the original development team.