Software Requirements Specification (SRS)

# Software Requirements Specification (SRS)
## AdMotion: Intelligent Vehicle Advertising Ecosystem

Version: 2.0  
Date: February 17, 2026  
Status: Final  
Classification: Confidential



# Table of Contents

1. [Introduction](#1-introduction)
2. [Overall Description](#2-overall-description)
3. [Specific Requirements](#3-specific-requirements)
4. [External Interface Requirements](#4-external-interface-requirements)
5. [Functional Requirements](#5-functional-requirements)
6. [Non-Functional Requirements](#6-non-functional-requirements)
7. [Data Requirements](#7-data-requirements)
8. [Quality Attributes](#8-quality-attributes)
9. [Design Constraints](#9-design-constraints)
10. [Implementation Notes](#10-implementation-notes)
11. [Performance Specifications](#11-performance-specifications)
12. [Security Specifications](#12-security-specifications)
13. [API Specifications](#13-api-specifications)
14. [Database Schema](#14-database-schema)
15. [Testing Requirements](#15-testing-requirements)
16. [Deployment Requirements](#16-deployment-requirements)
17. [Support & Maintenance](#17-support--maintenance)
18. [Glossary](#18-glossary)
19. [Appendices](#19-appendices)
20. [Approval & Sign-Off](#20-approval--sign-off)



# 1. Introduction

## 1.1 Purpose
This Software Requirements Specification (SRS) defines the complete functional and non-functional requirements for the AdMotion vehicle advertising platform. It provides a comprehensive reference for developers, architects, testers, and stakeholders.

## 1.2 Scope
- Web-based Admin Dashboard (React application)
- Vehicle Display Application (PWA)
- Backend API (FastAPI)
- Firebase Firestore Database
- Real-time Synchronization System
- Analytics and Reporting Engine
- Payment Processing System

## 1.3 Document Organization
This document follows IEEE 830 standards and is organized into 20 major sections covering all system requirements.

## 1.4 Audience
- Software Development Team
- Quality Assurance Engineers
- System Architects
- Project Managers
- Business Stakeholders
- System Administrators



# 2. Overall Description

## 2.1 Product Perspective
AdMotion is a cloud-native, fully integrated platform operating on Firebase infrastructure.

## 2.2 Product Functions
Major system functions:
- User authentication and role-based access control
- Vehicle registration and comprehensive lifecycle management
- Advertising campaign creation and management
- Real-time content synchronization
- Performance analytics and reporting
- Automated financial management and settlements
- System administration and monitoring

## 2.3 User Classes

### 2.3.1 Super Admin
- **Skill Level:** High technical expertise
- **Primary Task:** System-wide management and oversight
- **Frequency:** Daily
- **Permissions:** Full system access

### 2.3.2 Regional Admin
- **Skill Level:** Medium business operations
- **Primary Task:** Regional fleet management
- **Frequency:** Daily
- **Permissions:** Regional management and approval authority

### 2.3.3 Moderator
- **Skill Level:** Medium reporting and analysis
- **Primary Task:** Content moderation and analytics
- **Frequency:** Daily
- **Permissions:** Read-only reporting access

### 2.3.4 Fleet Manager
- **Skill Level:** Medium technical skills
- **Primary Task:** Vehicle and revenue management
- **Frequency:** Weekly
- **Permissions:** Vehicle management and revenue dashboard

### 2.3.5 Advertiser
- **Skill Level:** Low to Medium marketing background
- **Primary Task:** Campaign creation and monitoring
- **Frequency:** Multiple times weekly
- **Permissions:** Campaign creation and analytics viewing

### 2.3.6 Vehicle Application (Automated)
- **Type:** Embedded system on Android TV Box
- **Primary Task:** Ad display and health monitoring
- **Frequency:** Continuous
- **Permissions:** Display management and status reporting

## 2.4 Operating Environment

### 2.4.1 Hardware
- **Server:** Cloud-based (Firebase, Google Cloud)
- **Web Client:** Modern browsers (Chrome, Firefox, Safari)
- **Mobile:** Responsive design for tablets
- **Vehicle:** Android TV Box (Minimum 2GB RAM, 16GB Storage)

### 2.4.2 Software
- **Frontend:** React 18+, Node.js 16+
- **Backend:** Python 3.9+, FastAPI
- **Database:** Firebase Firestore
- **Storage:** Firebase Storage
- **Authentication:** Firebase Authentication

### 2.4.3 Network Requirements
- Dashboard: Minimum 1 Mbps
- Vehicle App: 500 Kbps sustained
- 4G/LTE connectivity for vehicles
- Redundant internet connectivity recommended



# 3. Specific Requirements

## 3.1 Requirement Classification
Requirements are categorized as:
- **F-XXX:** Functional Requirements
- **NF-XXX:** Non-Functional Requirements
- **UI-XXX:** User Interface Requirements
- **DS-XXX:** Data/Security Requirements
- **INT-XXX:** Integration Requirements



# 4. External Interface Requirements

## 4.1 User Interface Requirements

### 4.1.1 Web Dashboard Interface
- Responsive layout (desktop, tablet, mobile)
- Sidebar navigation with role-based menu
- Top navigation bar with user profile and notifications
- Main content area with dynamic components
- Footer with support links
- Accessibility compliance (WCAG 2.1 AA)

### 4.1.2 Login Interface
- Email/username and password fields
- "Remember Me" checkbox
- "Forgot Password" link
- Real-time validation
- Clear error messages
- Rate limiting: 5 attempts per 15 minutes

### 4.1.3 Vehicle Display Application
- Multi-screen layout support (front, back, left, right)
- Automatic ad rotation and playback
- Smooth transitions (500ms fade)
- Offline mode with cached content
- Debug overlay (Shift+D) for technicians

### 4.1.4 Dashboard Components
- Real-time KPI cards
- Interactive charts and graphs
- Data tables with sorting/filtering
- Modal dialogs for forms
- Toast notifications for alerts

## 4.2 Hardware Interface Requirements

### 4.2.1 Android TV Box Integration
- Support for Xiaomi Box, Mecool, X88 Pro
- Minimum specs: ARMv7+ processor, 2GB RAM, 16GB storage
- Dual WiFi bands (2.4GHz, 5GHz)
- HTTP/HTTPS and WebSocket communication

### 4.2.2 LED Display Interface
- Support for P4, P5 outdoor LED panels
- Resolution: 1920x480, 2560x720, 3840x2160
- Brightness: 5000+ nits with auto-dimming
- Refresh Rate: 60Hz minimum
- Color Support: 16-bit color minimum

### 4.2.3 GPS Module Integration
- Update Frequency: Every 30 seconds
- Accuracy: ±10 meters
- Data Format: Latitude, Longitude, Altitude, Speed
- Encrypted transmission to backend
- Data retention: 30 days maximum

## 4.3 Software Interface Requirements

### 4.3.1 Firebase Firestore Interface
- CRUD operations on collections
- Real-time listeners for data updates
- Batch operations with atomic transactions
- Complex filtering and sorting capabilities
- Rule-based access control

### 4.3.2 Firebase Storage Interface
- Supported Formats: MP4, WebM, JPG, PNG, GIF
- Maximum File Size: 100MB per file
- Direct browser upload with progress tracking
- CDN delivery with auto-resizing
- Public/private access control

### 4.3.3 Firebase Authentication Interface
- Email/password authentication
- Phone number authentication
- Google Sign-In integration
- JWT token management (1-hour expiry)
- 7-day refresh token rotation
- Multi-factor authentication support

### 4.3.4 FastAPI Backend Interface
- REST API over HTTPS
- Endpoints for scheduling, optimization, analytics
- Rate Limiting: 100 requests per minute
- Request timeout: 30 seconds maximum
- Standard HTTP status codes



# 5. Functional Requirements

## 5.1 Authentication & Authorization (F-001 through F-004)

### F-001: User Login
**Description:** Authenticate user with credentials  
**Pre-condition:** User has registered account  
**Main Flow:**
1. User enters email and password
2. System validates credentials
3. System queries Firestore for user
4. System verifies password hash
5. System creates session token
6. System logs authentication event
7. User redirected to dashboard

**Acceptance Criteria:**
- Login succeeds within 2 seconds
- Invalid credentials show error message
- Account lockout after 5 failed attempts
- Sessions expire after 30 minutes inactivity
- All login events audited

### F-002: User Logout
**Description:** Terminate user session  
**Acceptance Criteria:**
- Logout completes within 500ms
- Session immediately invalidated
- Forward button disabled after logout
- All session data cleared

### F-003: Password Reset
**Description:** Allow user to reset forgotten password  
**Acceptance Criteria:**
- Email sent within 10 seconds
- Reset link valid for 24 hours only
- One-time use link only
- Password must meet complexity requirements

### F-004: Role-Based Access Control
**Description:** Enforce user permissions based on role  
**Roles:**
- Super Admin: All permissions
- Admin: Regional management
- Moderator: Read-only reporting
- Fleet Manager: Vehicle and revenue management
- Advertiser: Campaign creation

**Acceptance Criteria:**
- Permission checks on every API call
- Unauthorized access logged
- Role changes effective within 60 seconds
- UI reflects user permissions correctly

## 5.2 Vehicle Management (F-005 through F-008)

### F-005: Vehicle Registration
**Description:** Register new vehicle with complete details  
**Pre-condition:** Admin logged in, vehicle not registered  
**Acceptance Criteria:**
- Registration completes in <30 seconds
- All fields validated before submission
- Documents auto-scanned for completeness
- Owner receives credentials via email/SMS
- Vehicle ID generated uniquely

### F-006: Vehicle Status Management
**Description:** Update vehicle operational status  
**Status Values:**
- Pending: Awaiting verification
- Active: Operational
- Maintenance: Temporary offline
- Suspended: Deactivated
- Inactive: Owner deactivated

**Acceptance Criteria:**
- Status change effective within 10 seconds
- Owner notified immediately
- Status change audited
- Ad delivery respects status

### F-007: Vehicle Health Monitoring
**Description:** Track vehicle connectivity and health  
**Acceptance Criteria:**
- Heartbeat received within 90 seconds
- Dashboard shows real-time health
- Alerts generated for >5 minute offline
- Historical data retained 30 days
- Performance data accurate to <5%

### F-008: Vehicle Location Tracking
**Description:** Track vehicle GPS location in real-time  
**Acceptance Criteria:**
- Location accuracy within 10 meters
- Location updated every 30-60 seconds
- Historical locations retained 90 days
- Map shows real-time vehicle positions
- Location data encrypted in transit

## 5.3 Campaign Management (F-009 through F-014)

### F-009: Campaign Creation
**Description:** Create new advertising campaign  
**Main Flow:**
1. Advertiser enters campaign details
2. Sets budget (minimum $100, maximum $100,000)
3. Sets duration (1-365 days)
4. Uploads media (PNG, JPG, GIF, MP4, WebM)
5. Sets targeting criteria
6. Reviews and submits for approval

**Acceptance Criteria:**
- Creation takes <10 minutes
- Media preview available
- Budget validation prevents overspend
- Content preview on all screens
- Campaign starts immediately after approval

### F-010: Campaign Approval Workflow
**Description:** Review and approve/reject campaigns  
**Acceptance Criteria:**
- Automated checks in <5 seconds
- Human review within <4 hours
- Clear rejection reasons provided
- Appeal process documented
- 99% approval within 4 hours

### F-011: Campaign Scheduling
**Description:** Schedule campaign display timing  
**Options:**
- Immediate start
- Scheduled start date/time
- Recurring daily/weekly
- Specific time ranges
- Days of week selection
- Holiday exclusions

**Acceptance Criteria:**
- Flexible scheduling options
- Accurate impression forecasting
- Schedule changes effective within 1 hour
- Recurring campaigns auto-renew

### F-012: Campaign Monitoring & Analytics
**Description:** Track campaign performance in real-time  
**Metrics:**
- Impressions (total, unique)
- Geographic distribution
- Time of day performance
- Vehicle type performance
- Budget spent vs. allocated
- ROI calculation

**Acceptance Criteria:**
- Metrics accurate within <1%
- Dashboard loads in <3 seconds
- Charts respond to interactions
- Export data in CSV, PDF, Excel
- Historical reports accessible

### F-013: Campaign Budget Management
**Description:** Track and enforce campaign budgets  
**Acceptance Criteria:**
- Budget enforcement within 1 minute
- Real-time spend tracking
- Clear budget status indicators
- Historical spend records
- Budget reports available

### F-014: Emergency Campaign Stop
**Description:** Immediately halt active campaign  
**Acceptance Criteria:**
- All vehicles stop within 10 seconds
- Zero orphaned ads on display
- Audit trail records reason and user
- Partial refund processed if applicable

## 5.4 Ad Distribution & Synchronization (F-015 through F-018)

### F-015: AI-Powered Ad Distribution
**Description:** Intelligently distribute ads across network  
**Acceptance Criteria:**
- Algorithm efficiency >95%
- Processing within 5 minutes
- Fair distribution across vehicles
- Budget constraints always satisfied
- Geographic targeting respected

### F-016: Manual Ad Assignment
**Description:** Override automatic distribution  
**Acceptance Criteria:**
- Manual override works instantly
- Premium pricing available
- Cost impact displayed
- Instant vehicle-side update
- Audit trail maintained

### F-017: Real-Time Synchronization
**Description:** Push content updates to vehicles in real-time  
**Acceptance Criteria:**
- 95% sync within 200ms
- Graceful offline handling
- Queue updates for offline vehicles
- Content pre-cached when possible
- Sync success rates tracked

### F-018: Offline Content Handling
**Description:** Display ads when vehicle has no connectivity  
**Acceptance Criteria:**
- Operation for up to 24 hours offline
- Queue up to 10,000 impression records
- Cache rotation prevents stale content
- Auto cleanup of old cache
- Switch to previous ad if current missing

## 5.5 Analytics & Reporting (F-019 through F-021)

### F-019: Real-Time Analytics Dashboard
**Description:** Display live performance metrics  
**Components:**
- Live KPI cards
- Impression trend graph
- Geographic heat map
- Top performing campaigns
- Vehicle performance breakdown
- Real-time notifications

**Acceptance Criteria:**
- Metrics accurate within 1%
- Dashboard responsive on all devices
- Charts interactive
- 99.9% dashboard availability
- <3 second load time

### F-020: Campaign Performance Reports
**Description:** Generate detailed campaign analytics  
**Components:**
- Campaign summary
- Impression metrics
- Performance trends
- Geographic breakdown
- Vehicle type breakdown
- ROI calculation
- Benchmark comparison
- Optimization recommendations

**Acceptance Criteria:**
- Generation within 30 seconds
- Data accuracy verified
- Trend analysis meaningful
- Export renders correctly
- Historical reports accessible

### F-021: Revenue & Financial Reports
**Description:** Track financial performance and payouts  
**Reports:**
- Total revenue by period
- Cost per impression trends
- Vehicle owner payouts
- Platform revenue
- Tax calculations
- Financial reconciliation
- Payout history

**Acceptance Criteria:**
- Accuracy to 0.01%
- Audit trail for all transactions
- Payout processing transparent
- Historical records retained
- Tax reporting compliance

## 5.6 Payment & Revenue (F-022 through F-024)

### F-022: Revenue Calculation
**Description:** Calculate revenue based on impressions  
**Formula:** Revenue = Impressions × CPM ÷ 1000  
**Acceptance Criteria:**
- Calculation accuracy to 0.01%
- Real-time impression counting
- Rate adjustments applied correctly
- Historical revenue tracking
- Calculation details transparent

### F-023: Automated Payout Processing
**Description:** Process monthly payments to vehicle owners  
**Payment Methods:**
- Bank transfer
- E-wallet transfer
- Check (if requested)

**Timeline:**
- Processing: 1-2 days
- Settlement: 3-5 business days

**Acceptance Criteria:**
- All eligible payments processed
- 99.9% success rate
- Payment receipts generated
- Dispute process available
- Payment history accessible

### F-024: Invoice & Statement Generation
**Description:** Generate financial statements and invoices  
**Frequency:**
- Monthly automatic statements
- On-demand reports available

**Export Formats:** PDF, Excel, Email delivery  
**Acceptance Criteria:**
- Generation within 1 minute
- Data accuracy verified
- Professional formatting
- Email delivery successful
- Historical access >2 years

## 5.7 System Administration (F-025 through F-027)

### F-025: User Role Management
**Description:** Create and manage user roles and permissions  
**Acceptance Criteria:**
- Role changes effective within 60 seconds
- Permission denials return appropriate error
- Audit log records all changes
- Role-based UI rendering correct

### F-026: System Configuration
**Description:** Configure system-level parameters  
**Configurable:**
- Revenue share percentages
- Campaign budget limits
- Content moderation rules
- Geographic service areas
- Payment settings
- Notification preferences
- Maintenance windows

**Acceptance Criteria:**
- Changes effective within 1 hour
- Configuration validation prevents errors
- Rollback capability available
- Change history maintained
- All changes audited

### F-027: System Monitoring & Alerts
**Description:** Monitor system health and performance  
**Metrics:**
- API response times
- Database performance
- Storage usage
- Network bandwidth
- Error rates
- Failed requests
- Active user count

**Alert Triggers:**
- High error rates (>1%)
- Slow response (>5s)
- Database connectivity issues
- Storage >80% capacity
- Network issues
- Unauthorized access attempts

**Acceptance Criteria:**
- Real-time monitoring dashboard
- Alerts within 60 seconds
- Multiple alert channels
- Alert history maintained
- Data retained 90 days



# 6. Non-Functional Requirements

## 6.1 Performance Requirements (NF-001 through NF-004)

### NF-001: Dashboard Response Time
- Page load time: <2 seconds (first load)
- Page transitions: <500ms
- Data table rendering: <1 second for 1000 rows
- Chart generation: <3 seconds
- Search results: <1 second
- Measured: 95th percentile

### NF-002: API Performance
- REST API response: <200ms for critical endpoints
- Non-critical endpoints: <1 second
- Real-time sync: <200ms for 95% of messages
- Batch operations: 1000 items in <30 seconds

### NF-003: Vehicle App Performance
- App launch time: <3 seconds
- Ad switching: <500ms with smooth transition
- Offline mode: Instant (cached)
- UI responsiveness: 60 FPS minimum

### NF-004: Scalability
- 1000+ concurrent users
- 10,000+ active vehicles
- 100+ impressions per second
- 1000 simultaneous reports
- Millions of daily transactions

## 6.2 Reliability & Availability (NF-005 through NF-008)

### NF-005: System Uptime
- Target: 99.9% uptime
- Measured: Over 30-day periods
- Maintenance windows: Scheduled low-usage periods
- Zero-downtime deployments required

### NF-006: Fault Tolerance
- Automatic failover for critical services
- No single point of failure
- Data replication across regions
- Backup database auto-activation
- Message queue persistence

### NF-007: Data Backup & Recovery
- Daily backups (90 days retention)
- Weekly backups (1 year retention)
- RTO: <1 hour
- RPO: <1 hour
- Monthly recovery testing

### NF-008: Error Handling
- Graceful degradation when services fail
- Clear error messages to users
- Automatic retry for transient failures
- Circuit breaker pattern for dependencies
- Exponential backoff for retries

## 6.3 Security Requirements (NF-009 through NF-015)

### NF-009: Authentication
- Password requirements: 12+ characters, mixed case, numbers, symbols
- Multi-factor authentication (TOTP, SMS, Email)
- Session management: 30-minute timeout, 8-hour max
- Single session per user (new login invalidates old)

### NF-010: Authorization
- Role-based access control (RBAC)
- Attribute-based access control (ABAC)
- Permission inheritance from roles
- Deny-by-default approach
- Audit trail of all permission checks

### NF-011: Data Encryption
- TLS 1.3 for data in transit
- AES-256 for data at rest
- Key rotation every 90 days
- Separate encryption keys per tenant
- Secure key management (Cloud KMS)

### NF-012: Input Validation
- Client-side validation for UX
- Server-side validation for security
- Whitelist-based validation
- File upload validation:
  - File signature verification
  - File size limits
  - Antivirus scanning
  - MIME type validation

### NF-013: Output Encoding
- HTML entity encoding
- URL encoding for URLs
- JSON encoding for API
- CSV escaping for exports
- XSS attack prevention

### NF-014: Audit Logging
- All user actions logged
- Login/logout events recorded
- Configuration changes tracked
- Data access logged
- Financial transactions audited
- 7-year retention for audit logs

### NF-015: Compliance Requirements
- GDPR compliance (access, deletion, portability)
- CCPA compliance for US data
- Local data protection laws
- Financial transaction regulations
- PCI-DSS for payment data
- 72-hour breach notification

## 6.4 Usability Requirements (NF-016 through NF-019)

### NF-016: User Interface Consistency
- Consistent color scheme and typography
- Standard navigation patterns
- Keyboard shortcuts for common tasks
- Integrated help system
- Dark/light theme support

### NF-017: Accessibility
- WCAG 2.1 Level AA compliance
- Screen reader support
- Keyboard navigation for all features
- Color contrast ratio 4.5:1
- Alternative text for all images
- Form labels associated with inputs

### NF-018: Responsiveness
- Desktop: 1920x1080 and larger
- Tablet: 768x1024 to 1024x768
- Mobile: 320x568 to 480x854
- Touch-friendly (44x44 px buttons)
- Orientation changes handled

### NF-019: Help & Documentation
- In-app contextual help
- Tutorial for first-time users
- FAQ section
- Video demonstrations
- Support contact information

## 6.5 Maintainability & Support (NF-020 through NF-023)

### NF-020: Code Quality
- Code review before all deployments
- Test coverage >80% for critical paths
- Documentation for all major functions
- Coding standards adherence
- Regular technical debt reduction

### NF-021: Logging & Monitoring
- Comprehensive operation logging
- Structured logging format (JSON)
- Log levels: DEBUG, INFO, WARN, ERROR, CRITICAL
- Centralized log aggregation
- Real-time alerting for critical events

### NF-022: Supportability
- 24/5 support for critical issues (weekdays)
- 24/7 support for critical security (all days)
- <1 hour response for critical issues
- <4 hour response for normal issues
- Knowledge base maintained
- Support ticket tracking

### NF-023: Deployment
- Automated deployment pipeline
- Blue-green deployment capability
- Canary deployments for risky changes
- Rollback within 5 minutes if needed
- Zero-downtime updates for most changes



# 7. Data Requirements

## 7.1 Data Dictionary

| Field | Type | Constraints | Description |
|-------|------|-------------|-------------|
| uid | String | PK | Unique user identifier |
| email | String | Unique | User email address |
| password_hash | String | Required | Bcrypt hashed password |
| role | String | [Admin, Moderator, etc] | User role |
| name | String | Max 100 | Full name |
| phone | String | Max 20 | Contact number |
| created_at | Timestamp | Auto | Account creation date |
| last_login | Timestamp | Optional | Last login timestamp |

## 7.2 Data Volume Estimates

| Entity | Year 1 | Year 2 | Year 3 |
|--------|--------|---------|---------|
| Users | 1,000 | 5,000 | 20,000 |
| Vehicles | 500 | 2,000 | 5,000 |
| Campaigns | 5,000 | 50,000 | 200,000 |
| Impressions/day | 5M | 50M | 200M |
| Storage (GB) | 50 | 200 | 500 |

## 7.3 Data Quality Requirements
- **Accuracy:** 99.99% for financial data
- **Completeness:** 100% for required fields
- **Consistency:** Real-time synchronization
- **Timeliness:** Real-time for operational, daily for historical
- **Auditability:** Complete audit trail for all transactions



# 8. Quality Attributes

## 8.1 Performance Metrics
- Page load time: <2 seconds (95th percentile)
- API latency: <200ms (95th percentile)
- Sync latency: <200ms (95th percentile)
- Database query time: <100ms (95th percentile)

## 8.2 Reliability Metrics
- System uptime: >99.9%
- Data consistency: 99.99%
- Transaction success rate: >99.9%
- Error rate: <0.1% of requests

## 8.3 Security Metrics
- Zero critical vulnerabilities
- Quarterly security audits
- <24 hour patch deployment for critical CVEs
- 100% encryption in transit and at rest

## 8.4 User Experience Metrics
- System Usability Scale (SUS): >80
- Net Promoter Score (NPS): >60
- First-time user setup: <15 minutes
- Feature discoverability: >90%



# 9. Design Constraints

## 9.1 Technology Constraints
- Firebase Firestore as primary database
- React for web frontend
- FastAPI for backend API
- Android TV Box for vehicle displays
- PWA for cross-platform vehicle app

## 9.2 Architectural Constraints
- Microservices architecture where possible
- Stateless API design for scalability
- Cloud-native deployment
- RESTful API design
- Real-time messaging via WebSockets/Firebase

## 9.3 Regulatory Constraints
- GDPR data privacy compliance
- CCPA compliance for US
- Local data residency requirements
- Financial transaction regulations
- Advertising standards compliance



# 10. Implementation Notes

## 10.1 Development Best Practices
- Test-driven development (TDD) required
- Code review for all changes
- Continuous integration/deployment
- Automated testing at all levels
- Performance testing before release

## 10.2 Documentation Requirements
- API documentation with examples
- User guides for all major features
- Administrator manual
- Architecture documentation
- Database schema documentation



# 11. Performance Specifications

## 11.1 Response Time Targets
- Dashboard: <2 seconds
- API endpoints: <200ms
- Real-time sync: <200ms
- Report generation: <30 seconds

## 11.2 Throughput Targets
- Support 1000+ concurrent users
- Process 100+ impressions per second
- Handle 10,000+ active vehicles
- Generate 1000 reports simultaneously

## 11.3 Capacity Planning
- Year 1: 500 vehicles, 5M impressions/month
- Year 2: 2,000 vehicles, 50M impressions/month
- Year 3: 5,000 vehicles, 200M impressions/month



# 12. Security Specifications

## 12.1 Authentication & Authorization
- TLS 1.3 for all communications
- AES-256 encryption for data at rest
- Bcrypt password hashing
- JWT token-based sessions
- Multi-factor authentication support

## 12.2 Data Protection
- Encryption in transit and at rest
- Secure key management
- Access control lists
- Data minimization principles
- Retention policies enforced

## 12.3 Audit & Compliance
- Complete audit logging
- GDPR compliance
- CCPA compliance
- Quarterly security audits
- Annual penetration testing



# 13. API Specifications

## 13.1 REST API Endpoints

### Authentication
```
POST   /api/v1/auth/register
POST   /api/v1/auth/login
POST   /api/v1/auth/refresh
POST   /api/v1/auth/logout
```

### Vehicle Management
```
GET    /api/v1/vehicles
POST   /api/v1/vehicles
GET    /api/v1/vehicles/{id}
PATCH  /api/v1/vehicles/{id}
DELETE /api/v1/vehicles/{id}
GET    /api/v1/vehicles/{id}/health
POST   /api/v1/vehicles/{id}/heartbeat
```

### Campaign Management
```
GET    /api/v1/campaigns
POST   /api/v1/campaigns
GET    /api/v1/campaigns/{id}
PATCH  /api/v1/campaigns/{id}
POST   /api/v1/campaigns/{id}/approve
POST   /api/v1/campaigns/{id}/reject
POST   /api/v1/campaigns/{id}/emergency-stop
```

### Analytics
```
GET    /api/v1/analytics/dashboard
GET    /api/v1/analytics/campaigns/{id}
GET    /api/v1/analytics/impressions
POST   /api/v1/analytics/reports/generate
```



# 14. Database Schema

## 14.1 Firestore Collections
```
users/
  {uid}/
    profile
    preferences
    permissions
    audit_logs

vehicles/
  {vehicle_id}/
    details
    owner_info
    status
    location
    health_metrics
    performance

campaigns/
  {campaign_id}/
    details
    content
    targeting
    budget
    status
    analytics

impressions/
  {impression_id}/
    campaign_id
    vehicle_id
    timestamp
    duration
    metrics

revenue/
  {transaction_id}/
    vehicle_id
    amount
    impressions
    date
    status
```



# 15. Testing Requirements

## 15.1 Unit Testing
- Framework: Jest (React), Pytest (Python)
- Target: >80% code coverage
- Execution: On every commit

## 15.2 Integration Testing
- Components with API calls
- Database operations
- Real-time synchronization
- Execution: On pull requests

## 15.3 End-to-End Testing
- Framework: Cypress
- Critical user flows
- Execution: Before release

## 15.4 Performance Testing
- Load testing: 1000 concurrent users
- Stress testing: 10x normal load
- Endurance testing: 72-hour runs
- Tools: Apache JMeter, K6



# 16. Deployment Requirements

## 16.1 Development Environment
- Docker Compose with Firebase Emulator
- Local React Server (port 3000)
- Local FastAPI (port 8000)
- Local Database (Firebase Emulator)

## 16.2 Staging Environment
- Vercel (Preview URLs)
- Cloud Run (FastAPI - limited scale)
- Firestore (test project)
- Cloud Storage (test buckets)

## 16.3 Production Environment
- Vercel (Edge Functions, serverless)
- Cloud Run (FastAPI - auto-scaled)
- Firestore (production scale)
- Cloud Storage (replicated, backup)
- CDN (global edge caching)
- Monitoring & alerting (24/7)



# 17. Support & Maintenance

## 17.1 Support Process
- **Email:** [email protected]
- **Phone:** +1-XXX-XXX-XXXX (business hours)
- **Chat:** In-app support widget
- **Portal:** Self-service knowledge base

## 17.2 Severity Levels
- **Critical:** System down → 1 hour response
- **High:** Major feature broken → 4 hour response
- **Medium:** Performance issue → 8 hour response
- **Low:** Question → 24 hour response

## 17.3 Maintenance Schedule
- **Weekly:** Database cleanup, log rotation
- **Monthly:** Security patches, updates
- **Quarterly:** Full system review, capacity planning
- **Annually:** Disaster recovery drill, audit

## 17.4 SLA Terms
- **Uptime Target:** 99.9% calculated monthly
- **Response Time:** <200ms for 95% of requests
- **Data Durability:** 99.99% (4 nines)



# 18. Glossary

| Term | Definition |
|------|-----------|
| **DOOH** | Digital Out-of-Home - advertising on electronic displays |
| **CPM** | Cost Per Thousand - advertising rate metric |
| **Impression** | One display of an advertisement |
| **LED** | Light Emitting Diode - display technology |
| **PWA** | Progressive Web App - web app with offline capabilities |
| **API ** | Application Programming Interface |
| **RBAC** | Role-Based Access Control |
| **KMS** | Key Management Service |
| **RTO** | Recovery Time Objective |
| **RPO** | Recovery Point Objective |
| **Heartbeat** | Periodic status signal from vehicle |
| **Sync** | Synchronization of data |



# 19. Appendices

## 19.1 Appendix A: Requirement Traceability Matrix
[Reference to requirements mapping across system components]

## 19.2 Appendix B: Use Case Diagrams
[UML use case diagrams for major workflows]

## 19.3 Appendix C: Entity Relationship Diagrams
[Database schema diagrams]

## 19.4 Appendix D: Security Checklist
[Detailed security implementation checklist]

## 19.5 Appendix E: Performance Benchmarks
[Detailed performance test results]

## 19.6 Appendix F: API Examples
[Detailed API request/response examples]



# 20. Approval & Sign-Off

This Software Requirements Specification has been reviewed and approved by:

**Project Manager:** _____________________________ Date: _________

**Technical Lead:** _____________________________ Date: _________

**Business Sponsor:** _____________________________ Date: _________

**Quality Assurance Lead:** _____________________________ Date: _________


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