System Requirements Document

1. Introduction

This document outlines the system requirements for a billing point-of-sale (POS) website tailored for an Indian Chinese restaurant. The requirements are derived from the user's chat input and the uploaded menu document.

2. System Overview

The system will serve as a billing POS website for an Indian Chinese restaurant, facilitating order management and billing processes. It will include a digital representation of the restaurant's menu, allowing for efficient order processing and billing.

3. Functional Requirements

Menu Management

• As a restaurant manager, I want to manage the menu items so that I can update prices and availability.
• As a restaurant manager, I want to categorize menu items by type (e.g., noodles, rice, momos) so that customers can easily navigate the menu.
• As a restaurant manager, I want to include specific items like 'French fries' and 'Veg roll' in the menu so that all offerings are accurately represented.
• As a restaurant manager, I want to offer portion options (Half/Full) for certain dishes so that customers can choose their preferred serving size.

Order Processing

• As a cashier, I want to input customer orders into the system so that I can generate a bill.
• As a cashier, I want a quick order entry feature so that I can efficiently process orders during peak hours.
• As a cashier, I want to apply discounts or offers to the bill so that I can provide promotions to customers.

Payment System

• As a cashier, I want to process payments through multiple methods (cash, card, digital wallets) so that I can accommodate customer preferences.

Billing

• As a cashier, I want to generate an itemized bill for each order so that customers can see a breakdown of their charges.
• As a cashier, I want to print or email the bill to the customer so that they have a record of their purchase.

Inventory Management

• As a restaurant manager, I want to track inventory levels of ingredients so that I can reorder supplies as needed.

Reporting

• As a restaurant manager, I want to generate sales reports so that I can analyze the restaurant's performance.

4. User Personas

• Restaurant Manager: Oversees the restaurant operations, manages menu and inventory, and analyzes sales reports.
• Cashier: Handles customer orders, processes payments, and generates bills.

5. Core User Flows

Order and Billing Flow

1. Cashier selects menu items from the digital menu.
2. Cashier applies any discounts or offers if applicable.
3. System generates an itemized bill.
4. Cashier prints or emails the bill to the customer.

Inventory Management Flow

1. Manager reviews inventory levels.
2. Manager updates inventory based on sales and deliveries.
3. System alerts manager when inventory is low.

6. Visuals Colors and Theme

• Color Theme: Vibrant colors reflecting the Indian Chinese cuisine theme, such as reds and yellows.
• Design Style: Modern and clean interface with intuitive navigation.

7. Signature Design Concept

• Logo and Branding: Incorporate elements of Indian and Chinese culture in the design.
• Menu Layout: Visually appealing with clear categorization of items.

8. Interaction Model & Motion Direction

• Interaction Model: Touch-friendly interface for easy use on tablets and touchscreens.
• Motion Direction: Smooth transitions between screens to enhance user experience.

9. Non-Functional Requirements

• Performance: The system should handle peak loads during busy hours without lag.
• Security: Ensure secure handling of customer data and transactions.

10. Tech Stack

• Frontend: React.js
• Backend: Python + FastAPI
• Database: MySQL with Alembic migrations

11. Assumptions and Constraints

• The system will be used primarily on tablets or touchscreen devices.
• The restaurant operates in a single location.

12. Glossary

• POS: Point of Sale
• Menu Item: A dish or drink offered by the restaurant
• Inventory: Stock of ingredients and supplies used in the restaurant

This document serves as a comprehensive guide for developing the billing POS website for the Indian Chinese restaurant, ensuring all functional and non-functional requirements are met.