The case assignment tasks me with designing a user interface for a tipping feature in the Tillhub POS system used in restaurants. The feature should offer varied tipping options: entering an exact tip amount, specifying a total bill including the tip, setting the tip as a percentage of the bill, or opting for no tip.‍

As a waiter at a restaurant using the Tillhub POS system,

I want multiple, clear options to input a tip when completing an order.

So that I can efficiently cater to varying customer tipping preferences and swiftly complete the checkout.

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The Tillhub POS system's tipping feature provides waiters with diverse options for processing customer tips. During checkout, waiters encounter options like "No tip", "Bill + Tip", "Custom tip", and "Percentage". The "Percentage" option offers both preset choices—like 10% or 15%—and a customizable input for unique percentages, such as 13%. After a tip choice is made, the exact tip and total amounts are displayed for clarity. Simultaneously, an accessible side panel lists order details, ensuring a seamless and efficient checkout process for the user.

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When I reach the tipping stage of the checkout process,
Then I should see options for "No tip", "Bill + Tip", "Custom tip", and "Percentage".‍

When I select the "No tip" option,
Then the "Proceed to payment" button should become active, allowing me to finalize the checkout without adding a tip.‍

When I select the "Bill + Tip" option,
Then I should be able to input a desired total amount, and the system should calculate the necessary tip to meet that amount.‍

When I opt for "Custom tip",
Then I should be able to input the exact tip amount for clarity and validation.‍

When I select the "Percentage" option,Then I should have the ability to manually enter a custom percentage, like "18%", into an input field.‍

Adjacent to the custom percentage input field,
Then I should also see preset choices like "10%", "15%", "20%", "25%", and "30%" for quick selection.

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In crafting the tipping feature for Tillhub's POS system, I prioritized efficiency, clarity, and adaptability. Understanding the fast-paced nature of a waiter's role, the options like "No tip", "Bill + Tip", "Custom tip", and preset percentages offer both flexibility and speed. With order details accessible on the side, potential oversights are minimized, ensuring a seamless and confident checkout experience for the waiter.