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BRD - User Registration

Document Control​

VersionDateAuthorDescription
1.02025-08-18BA TeamInitial Draft

Table of Contents​

  1. Executive Summary
  2. Project Overview
  3. Stakeholders
  4. Business Objectives
  5. Functional Requirements
  6. Non-Functional Requirements
  7. Business Rules
  8. User Interface Requirements
  9. Integration
  10. Error Handling and Edge Cases
  11. Compliance and Security
  12. Risks and Mitigation
  13. Testing Requirements
  14. Timeline and Milestones
  15. Success Criteria and KPIs
  16. Appendix

1. Executive Summary​

This document outlines the business requirements for implementing a user registration system that uses mobile numbers as the primary identifier. The system will enable new users to create accounts using their mobile phone numbers with OTP (One-Time Password) verification for enhanced security and user experience.

1.1 Purpose​

To establish a streamlined, secure, and user-friendly registration process that reduces friction while maintaining account security and authenticity.

1.2 Scope​

The scope of this BRD includes:

  • User registration via mobile number with OTP (One-Time Password) verification
  • Integration with SMS gateways and WhatsApp API for OTP delivery
  • User interface (UI) requirements for the registration process.
  • Security and compliance considerations
  • Error handling and user feedback mechanisms

2. Project Overview​

2.1 Technology Stack​

  • Frontend: TypeScript, Tanstack Router, Tanstack Form, Apollo Client
  • Backend: NestJS with TypeScript, GraphQL, Prisma ORM
  • Database: PostgreSQL
  • Communication: Third-party SMS gateway integration

2.2 Registration System Context​

This user registration system serves as the foundational entry point into the OX Agry platform. It establishes:

  • Primary User Identity: Mobile number-based unique identification
  • Security Foundation: OTP verification and fraud prevention mechanisms
  • Future KYC Readiness: Account structure prepared for Aadhaar verification integration
  • Platform Access: Gateway to agricultural services, equipment booking, and marketplace features

The registration system is designed as the first phase of user onboarding, with future integration planned for comprehensive KYC verification, profile picture management, and agricultural service workflows.

3. Stakeholders​

RoleName / Department
Project SponsorProduct Manager
Business AnalystBA Team
Development TeamMobile & Backend Devs
QA TeamQA Team
UX/UI DesignerDesign Team

4. Business Objectives​

4.1 Primary Objectives​

  • To provide a smooth and secure registration flow for new users
  • Implement secure authentication mechanism
  • Offer SMS or WhatsApp as a reliable channel for OTP delivery
  • Enable faster user onboarding process
  • Reduce fake account creation
  • Minimize user drop-off during the registration process

4.2 Success Metrics​

  • Registration completion rate > 85%
  • OTP delivery success rate > 98%
  • Average registration time < 3 minutes
  • User satisfaction score > 4.0/5.0

5. Functional Requirements​

FR-01: Mobile Number Input​

  • The mobile number field shall support international formats
  • The UI shall display a country code picker with a dropdown of supported countries
  • Input validation to ensure the mobile number is in a valid format (e.g., 10 digits for India numbers, country code required)
  • Check if mobile number already exists in system

FR-02: OTP Generation and Delivery via SMS or WhatsApp​

  • System shall generate 6-digit numeric OTP
  • OTP shall be sent via SMS through SMS gateway or WhatsApp through API.
  • System must validate the number and check WhatsApp availability (if possible)
  • OTP shall be valid for 15 minutes from generation
  • System shall send OTP via SMS or WhatsApp within 30 seconds
  • System shall allow maximum 5 OTP requests per mobile number per hour
  • System shall provide option to resend OTP after 30 seconds

FR-03: OTP Verification​

  • System shall accept OTP input with 6-digit numeric format
  • The system shall validate the OTP against the one sent to the user's mobile number
  • System shall validate OTP within 5 attempts
  • System shall lock mobile number for 30 mins after 5 failed attempts
  • System shall proceed to profile creation upon successful verification

FR-04: Profile Creation​

  • System shall require minimum user information (Name)
  • System shall require to accept the Terms and Privacy Policy
  • System shall automatically log in user after successful registration
  • Display a confirmation message in the app (e.g., "Registration successfull Welcome to OX Agry")
  • Redirect users to the app's dashboard.

6. Non-Functional Requirements​

NFR-01: Performance​

  • OTP generation and sending shall complete within 30 seconds
  • The registration process (from mobile number entry to confirmation) shall take no longer than 60 seconds, assuming valid inputs and no network delays

NFR-02: Security​

  • System shall encrypt all user data (mobile numbers, name) in database
  • OTPs shall be hashed in the backend database to prevent unauthorized access
  • Implement rate limiting to prevent abuse of OTP requests (e.g., max 5 OTPs per number in 30 minutes)
  • System shall log all registration activities for audit

NFR-03: Usability​

  • Registration process shall be mobile-responsive
  • Error messages shall be clear and actionable

NFR-04: Scalability​

  • System shall handle 10,000 registrations per day

7. Business Rules​

7.1 Registration Rules​

  • One mobile number can be associated with only one active primary account
  • Both dial code and mobile number mandatory
  • The backend infrastructure supports API calls for OTP generation, verification, and user data storage

7.2 Verification Rules​

  • OTP shall contain only numeric characters
  • OTP shall not contain sequential or repetitive patterns

8. User Interface Requirements​

8.1 Screen Flow​

Mobile Number Entry Screen:

  • Input field for mobile number with country code picker
  • Delivery Method "SMS" or "WhatsApp" buttons (enabled only when a valid number is entered and the dial code is +91)
  • For International dial codes (other than +91), enable only "WhatsApp" option

OTP Verification Screen:

  • 6-digit input field for OTP
  • "Resend OTP" option (visible after 30 seconds)
  • "Verify OTP" button

Profile Creation Screen:

  • Input Field for name
  • Checkbox for agreeing to Terms and Privacy Policy.
  • "Complete Registration" button

Confirmation Screen:

  • Welcome message to redirect to the dashboard

9. Integration​

  • System shall integrate with SMS gateway provider
  • System shall integrate with existing user management system
  • APIs shall support sending OTP in WhatsApp

10. Error Handling and Edge Cases​

  • Invalid Mobile Number: Display error message (e.g., "Please enter a valid mobile number") and highlight the input field
  • OTP Delivery Failure: Notify the user (e.g., "Failed to send OTP. Please try again.") and provide a "Resend OTP" option
  • Incorrect OTP: Display error message (e.g., "Invalid OTP. Please try again.") with retry option (up to 5 attempts)
  • Expired OTP: Prompt user to request a new OTP with a clear message (e.g., "Your OTP has expired. Request a new one?")
  • Network Issues: Display a message (e.g., "No internet connection. Please check your network and try again.")

11. Compliance and Security​

  • Data Retention: User data shall be retained only as long as necessary (e.g., delete unverified accounts after 30 days)
  • Security: Implement CAPTCHA or similar mechanisms to prevent automated registration attempts
  • Audit Logging: Log all registration attempts, including timestamps, mobile numbers (anonymized), and success/failure status

12. Risks and Mitigation​

RiskImpactMitigation
SMS delivery delays or failuresHigh - Users cannot complete registrationUse a reliable SMS gateway with fallback providers; implement retry mechanisms
WhatsApp delivery delays or failuresHigh - Users cannot complete registrationMonitor service status via provider's health endpoints. Notify user of temporary issue if WhatsApp service is down
Security vulnerabilities (e.g., OTP interception)High - Compromises user dataUse encrypted communication channels; implement rate limiting and CAPTCHA
High user drop-off during registrationMedium - Reduced user acquisitionOptimize UI for simplicity; provide clear instructions and feedback

13. Testing Requirements​

13.1 Test Scenarios​

  • End-to-end registration flow testing
  • OTP delivery and verification testing
  • Security and penetration testing
  • Performance and load testing
  • Cross-browser and device testing
  • Accessibility compliance testing

13.2 Acceptance Criteria​

  • All functional requirements must pass
  • Performance benchmarks must be met
  • Security vulnerabilities must be resolved
  • User acceptance testing approval required

14. Timeline and Milestones​

14.1 Development Phases​

  • Phase 1: Core registration flow (4 weeks)
  • Phase 2: Security implementation (2 weeks)
  • Phase 3: Integration and testing (3 weeks)
  • Phase 4: User acceptance and deployment (1 week)

14.2 Key Milestones​

  • Requirements approval: Week 1
  • Development completion: Week 6
  • Testing completion: Week 9
  • Production deployment: Week 10

15. Success Criteria and KPIs​

15.1 Launch Criteria​

  • All functional requirements implemented and tested
  • Security audit completed and approved
  • Performance benchmarks achieved
  • User acceptance testing passed

15.2 Post-Launch KPIs​

  • Registration conversion rate
  • OTP delivery success rate
  • User registration time
  • Support ticket volume
  • Security incident reports

16. Appendix​

NA