Requirements Overview

Functional Requirements Overview

Core Business Functions

Function	Description	Priority
Catalog Management	Browse, search, and filter books by various criteria (author, genre, price, ratings)	High
User Account Management	Registration, authentication, profile management, and preferences	High
Shopping Cart & Checkout	Add/remove items, manage quantities, secure payment processing	High
Order Management	Order placement, tracking, history, and status updates	High
Notification System	Order confirmations, shipping updates, promotional alerts	Medium
Rating & Review System	Customer reviews, ratings, and recommendation engine	Medium
Customer Support Chat	Real-time chat support for customer inquiries	Medium
Analytics & Reporting	Sales reports, user behavior analytics, inventory insights	Low

Key Use Cases

UC-001: Book Discovery and Purchase

• Actor: Customer
• Goal: Find and purchase desired books
• Scenario:
  1. Customer searches for books using filters
  2. Views book details, ratings, and reviews
  3. Adds books to cart
  4. Proceeds through secure checkout
  5. Receives order confirmation and tracking

UC-002: Account Management

• Actor: Customer
• Goal: Manage personal account and preferences
• Scenario:
  1. Customer registers/logs into account
  2. Updates profile information and preferences
  3. Views order history and tracking
  4. Manages payment methods and addresses

UC-003: Order Fulfillment

• Actor: System, Customer
• Goal: Process and fulfill customer orders
• Scenario:
  1. System validates order and payment
  2. Updates inventory and generates fulfillment tasks
  3. Sends notifications to customer
  4. Tracks shipment and delivery status

UC-004: Customer Support

• Actor: Customer, Support Agent
• Goal: Resolve customer inquiries and issues
• Scenario:
  1. Customer initiates chat support
  2. AI Agent analyzes customer issue
  3. Issue is resolved or escalated
  4. Interaction is logged for future reference

Driving Forces

Business Drivers

• Market Competition: Need for competitive features and user experience
• Scalability: Support growing customer base and transaction volumes
• Cost Efficiency: Optimize operational costs while maintaining quality
• Revenue Growth: Increase sales through improved user experience and features

Technical Drivers

• Performance: Fast response times for search, browse, and checkout operations
• Availability: 24/7 system availability with minimal downtime
• Security: Protect customer data and ensure secure transactions
• Maintainability: Easy to update, extend, and debug system components

Regulatory Drivers

• Data Protection: GDPR compliance for customer data handling
• Payment Security: PCI DSS compliance for payment processing
• Accessibility: WCAG guidelines for inclusive user experience
• Tax Compliance: Automated tax calculation for different jurisdictions

Quality Requirements Extract

Quality Attribute	Requirement	Measurement
Performance	Page load times under 2 seconds	95th percentile response time
Scalability	Support 10,000 concurrent users	Load testing verification
Availability	99.9% uptime	Monthly uptime monitoring
Security	Zero data breaches	Security audit compliance
Usability	Checkout completion rate above 85%	User analytics tracking

Non-Functional Requirements

Performance Requirements

The BookWorm system must deliver exceptional performance across all user interactions:

• Response Time: API endpoints must respond within 500ms for 95% of requests, measured through continuous load testing with realistic data volumes
• Page Load Speed: Complete page rendering within 2 seconds, monitored via browser performance tools
• Search Efficiency: Book search results delivered within 1 second, tracked through query execution metrics
• Transaction Throughput: System capacity of 1,000 transactions per minute during peak periods
• Database Optimization: Query execution under 100ms for 90% of database operations

Scalability & Reliability

Scalability Goals:

• Support 10,000 concurrent active users with auto-scaling capabilities
• Handle 100% annual growth in data volume (catalog and user data)
• Geographic distribution via CDN for global user base
• Peak load tolerance: 5x normal traffic during sales events (Black Friday scenarios)
• Horizontal scaling activation within 2 minutes of load increase

Reliability Standards:

• Uptime Target: 99.9% availability (maximum 8.76 hours downtime annually)
• Data Protection: 99.999% data durability with automated backup systems
• Fault Tolerance: Graceful degradation with single service failures
• Recovery: System restoration within 15 minutes of major incidents
• Consistency: Eventual data consistency across microservices within 5 minutes

Security & Compliance

Authentication & Access:

• Multi-factor authentication for sensitive operations
• Role-based access control (RBAC) following least privilege principle
• Regular access audits and permission reviews

Data Protection:

• AES-256 encryption for data at rest
• TLS 1.3 for all data transmission
• PCI DSS Level 1 compliance for payment processing
• GDPR compliance with data portability and deletion capabilities

Security Operations:

• Monthly vulnerability scanning with 48-hour critical patch window
• Continuous security monitoring and threat detection
• Annual security audits and compliance certifications

User Experience & Accessibility

Usability Standards:

• Responsive design across desktop, tablet, and mobile platforms
• WCAG 2.1 AA compliance for accessibility
• Shopping cart abandonment rate below 15%
• Checkout completion rate above 85%
• Maximum 3-click navigation to any book from homepage

User Support:

• Context-sensitive help system throughout the platform
• Real-time customer support chat integration
• Comprehensive user journey analytics and optimization

Technical Compatibility

Platform Support:

• Latest 2 versions of major browsers (Chrome, Firefox, Safari, Edge)
• Native-like mobile experience on iOS and Android
• RESTful API design with backward compatibility versioning

Integration Capabilities:

• Seamless integration with major payment gateways
• Support for common e-book formats (EPUB, PDF, MOBI)
• Third-party shipping provider compatibility
• Open API standards for partner integrations

Development & Operations

Code Quality Standards:

• Minimum 80% automated test coverage
• Comprehensive API documentation with examples
• Monthly technical debt assessment and remediation

Deployment & Monitoring:

• Zero-downtime automated CI/CD pipeline
• Comprehensive system monitoring with proactive alerting
• Regular security and dependency updates with minimal service impact
• Performance baseline monitoring and optimization