Engineering archive · Background technical note
Beyond buttons and screens
The visible interface sits above prices, modifiers, discounts, taxes, receipts, refunds and reporting events.
Business-critical flows
Split checks, transfers, voids, tips, refunds and menu changes require scenarios based on operational impact.
Backend validation
API, database and report checks confirm that each visible action creates the correct downstream state.
Regression strategy
High-frequency and high-impact flows deserve priority when tax, menu or payment logic changes.