# [Product Name] Product Requirement Document (PRD)

**Version**: v1.0
**Creation Date**: 2025-01-01
**Author**: Product Manager
**Status**: Draft/Under Review/Approved

---

## 1. Project Background and Objectives

### 1.1 Product Vision
Concisely describe the product's core value proposition and long-term vision.

### 1.2 Problem Statement
**Current Pain Points**:
- Specific problems faced by users
- Severity and impact scope of the problems
- Shortcomings of existing solutions

**Target Users**:
- Main user groups (age, occupation, behavioral characteristics)
- Secondary user groups
- User personas and typical scenarios

### 1.3 Success Metrics (KPI)
- **User Metrics**: DAU, MAU, Retention Rate
- **Business Metrics**: GMV, Conversion Rate, Average Order Value
- **Product Metrics**: Function Usage Rate, Completion Rate
- **Technical Metrics**: Response Time, Availability

### 1.4 Business Objectives and Constraints
**Business Objectives**:
- Short-term objectives (3 months)
- Mid-term objectives (6-12 months)
- Long-term objectives (1-3 years)

**Known Constraints**:
- Technical limitations
- Budget limitations
- Time limitations
- Platform limitations (iOS/Android/Web)

---

## 2. User Research and Competitor Analysis

### 2.1 User Personas
**Main User: Office Workers**
- Age: 25-35 years old
- Occupation: Internet, Finance, Consulting industries
- Pain Points: Difficult time management, low work efficiency
- Expectations: Simple and easy to use, improve productivity

### 2.2 User Journey

### 2.3 Competitor Analysis
| Competitor | Advantages | Disadvantages | Differentiation Opportunities |
|------|------|------|------------|
| Product A | Rich functions | High learning cost | Simplify operation process |
| Product B | Beautiful interface | Poor performance | Optimize performance experience |

---

## 3. Functional Requirements

### 3.1 Functional Architecture Diagram

### 3.2 User Story List

| ID | User Story | Priority | Acceptance Criteria | Dependencies |
|----|----------|--------|----------|------|
| US-001 | As a user, I want to register an account quickly so that I can start using the product | P0 | 1. Support email/phone registration<br>2. Registration process takes no more than 3 steps<br>3. Automatically log in after successful registration | None |
| US-002 | As a user, I want to log in securely so that I can access my data | P0 | 1. Support password login<br>2. Support third-party login<br>3. Clear prompts for login failures | US-001 |
| US-003 | As a user, I want to create tasks so that I can manage my work | P0 | 1. Can enter task title and description<br>2. Can set deadline<br>3. Task is displayed immediately after creation | US-002 |

### 3.3 Detailed Function Description

#### Functional Module: User Registration

**Function Description**:
Users register accounts via email or phone number, and can use the product after completing identity verification.

**Interaction Flow**:
1. User clicks the "Register" button
2. Selects registration method (email/phone)
3. Enters registration information
4. Receives verification code
5. Completes verification
6. Sets password
7. Registration successful, automatically logs in

**Interface Elements**:
- Registration method selection (Tab switch)
- Email/phone input box
- Verification code input box
- Password input box (with strength prompt)
- Terms of service checkbox
- Register button

**Data Fields**:
| Field Name | Type | Required | Validation Rules | Description |
|--------|------|------|----------|------|
| email | String | Yes | Email format | User's email |
| phone | String | Yes | Phone number format | User's phone |
| password | String | Yes | 6-20 characters, including letters and numbers | Login password |
| verifyCode | String | Yes | 6-digit number | Verification code |

**Business Rules**:
- Email/phone number cannot be registered repeatedly
- Verification code is valid for 5 minutes
- Password must contain letters and numbers
- A maximum of 3 accounts can be registered per IP per day

**Exception Handling**:
- Email/phone number already exists: Prompt "This account is already registered, please log in directly"
- Incorrect verification code: Prompt "Incorrect verification code, please re-enter"
- Expired verification code: Prompt "Verification code has expired, please re-obtain"
- Network error: Prompt "Network connection failed, please try again later"

**Interface Definition**:

---

## 4. Non-Functional Requirements

### 4.1 Performance Requirements
- **Response Time**: Page loading < 2 seconds, API response < 500ms
- **Concurrent Capability**: Support 10,000 concurrent users
- **Scalability**: Support horizontal scaling

### 4.2 Security Requirements
- **Authentication**: JWT Token authentication, 7-day validity
- **Authorization**: Role-Based Access Control (RBAC)
- **Data Encryption**: HTTPS transmission, sensitive data stored encrypted
- **Protection**: SQL injection, XSS, CSRF protection

### 4.3 Compatibility Requirements
- **Browsers**: Chrome 90+, Safari 14+, Firefox 88+
- **Mobile**: iOS 13+, Android 8+
- **Screens**: Support widths from 320px to 1920px

### 4.4 Availability Requirements
- **System Availability**: 99.9% (Monthly downtime < 43 minutes)
- **Data Backup**: Daily full backup, real-time incremental backup
- **Disaster Recovery**: RTO < 1 hour, RPO < 5 minutes

### 4.5 Maintainability Requirements
- **Code Standards**: Follow team coding standards
- **Documentation**: Complete API documentation and technical documentation
- **Logging**: Comprehensive logging and monitoring
- **Testing**: Unit test coverage > 80%

---

## 5. Technical Solution (Optional)

### 5.1 Technical Architecture

### 5.2 Database Design
```sql
-- User table
CREATE TABLE users (
  id BIGINT PRIMARY KEY AUTO_INCREMENT,
  email VARCHAR(255) UNIQUE,
  phone VARCHAR(20) UNIQUE,
  password_hash VARCHAR(255),
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

## Agile Development Process

### Scrum Framework
```markdown
Sprint Cycle: 2 weeks

Sprint Process:
1. Sprint Planning
   - Define Sprint goal
   - Select user stories
   - Decompose tasks and estimate effort

2. Daily Standup
   - What was completed yesterday
   - What is planned for today
   - Any obstacles encountered

3. Sprint Review
   - Demonstrate completed functions
   - Collect feedback
   - Update product backlog

4. Sprint Retrospective
   - Summarize what went well
   - Identify improvement opportunities
   - Formulate action plans

As [user role]
I want [function description]
So that [value/goal]

Acceptance Criteria:
- [ ] Criterion 1
- [ ] Criterion 2
- [ ] Criterion 3

Estimate: 5 story points
Priority: P0
Dependency: US-001

Project Document Structure:
├── PRD/
│   ├── Product Requirement Document.md
│   └── Functional Specification.md
├── Design/
│   ├── UI Design Drafts
│   └── Interactive Prototypes
├── Tech/
│   ├── Technical Solution.md
│   ├── API Documentation.md
│   └── Database Design.md
├── Test/
│   ├── Test Plan.md
│   └── Test Cases.md
└── Release/
    ├── Launch Plan.md
    └── Launch Checklist.md