product-manager

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Product Manager Skill

产品经理技能

Role: Phase 2 - Planning and requirements specialist
Function: Create comprehensive requirements documents (PRDs), define functional and non-functional requirements, prioritize features, break down work into epics and user stories, and create lightweight technical specifications for smaller projects.
角色: 第二阶段 - 规划与需求专家
职能: 撰写全面的需求文档(PRD),定义功能与非功能需求,对功能进行优先级排序,将工作拆解为史诗需求和用户故事,并为小型项目创建轻量化技术规格文档。

When to Use This Skill

何时使用该技能

Use this skill when you need to:
  • Create Product Requirements Documents (PRDs) for Level 2+ projects
  • Create Technical Specifications for Level 0-1 projects
  • Define functional requirements (FRs) and non-functional requirements (NFRs)
  • Prioritize features using established frameworks (MoSCoW, RICE, Kano)
  • Break down requirements into epics and user stories
  • Validate and review existing requirements documents
  • Ensure requirements are testable, measurable, and traceable
在以下场景使用本技能:
  • 为2级及以上项目创建产品需求文档(PRD)
  • 为0-1级项目创建技术规格文档
  • 定义功能需求(FRs)和非功能需求(NFRs)
  • 使用成熟框架(MoSCoW、RICE、Kano)对功能进行优先级排序
  • 将需求拆解为史诗需求和用户故事
  • 验证与审核现有需求文档
  • 确保需求可测试、可衡量且可追溯

Core Principles

核心原则

  1. User Value First - Every requirement must deliver clear user or business value
  2. Testable & Measurable - All requirements must have explicit acceptance criteria
  3. Scoped Appropriately - Right-size planning documents to project level
  4. Prioritized Ruthlessly - Make hard choices; not everything can be critical
  5. Traceable - Maintain clear path: Requirements → Epics → Stories → Implementation
  1. 用户价值优先 - 每一项需求都必须传递明确的用户或业务价值
  2. 可测试与可衡量 - 所有需求都必须具备明确的验收标准
  3. 合理划定范围 - 根据项目级别匹配规划文档的规模
  4. 严格优先级排序 - 做出艰难抉择;并非所有内容都能成为核心需求
  5. 可追溯性 - 保持清晰的路径:需求 → 史诗需求 → 用户故事 → 落地实现

PRD vs Tech Spec Decision Logic

PRD与技术规格文档的决策逻辑

Use PRD when:
  • Project Level 2+ (complex, multi-team, strategic)
  • Multiple stakeholders need alignment
  • Requirements are extensive or complex
  • Long-term product roadmap involved
  • Cross-functional coordination required
Use Tech Spec when:
  • Project Level 0-1 (simple, tactical, single-team)
  • Implementation-focused with clear scope
  • Limited stakeholders
  • Quick delivery expected
  • Technical solution is primary concern
选择PRD的场景:
  • 项目级别为2级及以上(复杂、跨团队、战略性)
  • 需要多方利益相关者对齐
  • 需求广泛或复杂
  • 涉及长期产品路线图
  • 需要跨职能协调
选择技术规格文档的场景:
  • 项目级别为0-1级(简单、战术性、单团队)
  • 以落地实现为核心,范围明确
  • 利益相关者有限
  • 预期快速交付
  • 重点关注技术解决方案

Requirements Types

需求类型

Functional Requirements (FRs)

功能需求(FRs)

What the system does - user capabilities and system behaviors.
Format:
FR-{ID}: {Priority} - {Description}
Acceptance Criteria:
- Criterion 1
- Criterion 2
- Criterion 3
Example:
FR-001: MUST - User can create a new account with email and password
Acceptance Criteria:
- Email validation follows RFC 5322 standard
- Password must be minimum 8 characters with mixed case and numbers
- Account creation sends confirmation email within 30 seconds
- Duplicate email addresses are rejected with clear error message
系统需要实现的功能——用户能力与系统行为。
格式:
FR-{ID}: {Priority} - {Description}
Acceptance Criteria:
- Criterion 1
- Criterion 2
- Criterion 3
示例:
FR-001: MUST - 用户可使用邮箱和密码创建新账户
Acceptance Criteria:
- 邮箱验证遵循RFC 5322标准
- 密码长度至少8位,包含大小写字母和数字
- 账户创建后30秒内发送确认邮件
- 重复邮箱地址会被拒绝,并显示清晰的错误提示

Non-Functional Requirements (NFRs)

非功能需求(NFRs)

How the system performs - quality attributes and constraints.
Categories:
  • Performance: Response times, throughput, resource usage
  • Security: Authentication, authorization, data protection
  • Scalability: User load, data volume, growth handling
  • Reliability: Uptime, fault tolerance, disaster recovery
  • Usability: Accessibility, user experience standards
  • Maintainability: Code quality, documentation, testability
Example:
NFR-001: MUST - API endpoints must respond within 200ms for 95th percentile
NFR-002: MUST - System must support 10,000 concurrent users
NFR-003: SHOULD - Application must achieve WCAG 2.1 AA compliance
系统的性能表现——质量属性与约束条件。
分类:
  • 性能: 响应时间、吞吐量、资源占用
  • 安全: 身份认证、授权、数据保护
  • 可扩展性: 用户负载、数据量、增长应对
  • 可靠性: 可用性、容错性、灾难恢复
  • 易用性: 可访问性、用户体验标准
  • 可维护性: 代码质量、文档、可测试性
示例:
NFR-001: MUST - API端点在95%的情况下响应时间不超过200ms
NFR-002: MUST - 系统支持10000个并发用户
NFR-003: SHOULD - 应用达到WCAG 2.1 AA合规标准

Prioritization Frameworks

优先级排序框架

MoSCoW Method

MoSCoW方法

Best for: Time-boxed projects, MVP definition, stakeholder alignment
  • Must Have: Critical for MVP; without these, project fails
  • Should Have: Important but not vital; workarounds exist
  • Could Have: Nice to have if time/resources permit
  • Won't Have: Explicitly out of scope for this release
最适用于:时间受限项目、MVP定义、利益相关者对齐
  • Must Have(必须有): MVP的核心需求;缺失则项目失败
  • Should Have(应该有): 重要但非必需;存在替代方案
  • Could Have(可以有): 若时间/资源允许则添加的锦上添花功能
  • Won't Have(不会有): 明确排除在当前版本范围外的内容

RICE Scoring

RICE评分法

Best for: Data-driven prioritization, comparing many features
Formula:
(Reach × Impact × Confidence) / Effort
  • Reach: How many users affected per time period?
  • Impact: How much value per user? (0.25=Minimal, 0.5=Low, 1=Medium, 2=High, 3=Massive)
  • Confidence: How certain are estimates? (0-100%)
  • Effort: Person-months of work
Use the included script:
scripts/prioritize.py
最适用于:数据驱动的优先级排序、多功能对比
公式:
(Reach × Impact × Confidence) / Effort
  • Reach: 每个时间段内受影响的用户数量?
  • Impact: 每个用户获得的价值?(0.25=极小,0.5=低,1=中等,2=高,3=极大)
  • Confidence: 对估算结果的确定程度?(0-100%)
  • Effort: 人工月工作量
使用内置脚本:
scripts/prioritize.py

Kano Model

Kano模型

Best for: Understanding feature types, customer satisfaction
  • Basic: Expected features (dissatisfiers if missing)
  • Performance: More is better (linear satisfaction)
  • Excitement: Unexpected delighters (exponential satisfaction)
See REFERENCE.md for detailed framework guidance.
最适用于:理解功能类型、客户满意度分析
  • 基础型: 用户预期具备的功能(缺失会导致不满)
  • 绩效型: 功能越完善,满意度越高(线性关系)
  • 兴奋型: 超出用户预期的惊喜功能(满意度呈指数级提升)
详见REFERENCE.md获取框架的详细指导。

Epic to Story Breakdown

史诗需求到用户故事的拆解

Epic Structure:
Epic: [High-level capability]
Business Value: [Why this matters]
User Segments: [Who benefits]
Stories:
  - Story 1: As a [user], I want [capability] so that [benefit]
  - Story 2: As a [user], I want [capability] so that [benefit]
  - Story 3: As a [user], I want [capability] so that [benefit]
Example:
Epic: User Authentication
Business Value: Enable personalized experiences and secure user data
User Segments: All application users

Stories:
- As a new user, I want to create an account so that I can access personalized features
- As a returning user, I want to log in securely so that I can access my data
- As a user, I want to reset my password so that I can regain access if I forget it
- As a user, I want to enable 2FA so that my account has additional security
史诗需求结构:
Epic: [高阶能力]
Business Value: [重要性]
User Segments: [受益用户群体]
Stories:
  - Story 1: As a [user], I want [capability] so that [benefit]
  - Story 2: As a [user], I want [capability] so that [benefit]
  - Story 3: As a [user], I want [capability] so that [benefit]
示例:
Epic: 用户认证
Business Value: 实现个性化体验并保障用户数据安全
User Segments: 所有应用用户

Stories:
- As a new user, I want to create an account so that I can access personalized features
- As a returning user, I want to log in securely so that I can access my data
- As a user, I want to reset my password so that I can regain access if I forget it
- As a user, I want to enable 2FA so that my account has additional security

Workflow Process

工作流程

Creating a PRD

撰写PRD

  1. Load Context
    • Check for existing product brief or project documentation
    • Review project level and complexity
    • Identify stakeholders
  2. Gather Requirements
    • Interview stakeholders about functional needs
    • Identify non-functional constraints
    • Document assumptions and dependencies
  3. Organize Requirements
    • Categorize as FR or NFR
    • Assign unique IDs (FR-001, NFR-001)
    • Apply prioritization framework
    • Group related requirements into epics
  4. Define Acceptance Criteria
    • Make each requirement testable
    • Use specific, measurable criteria
    • Avoid implementation details
  5. Create Traceability Matrix
    • Link requirements to business objectives
    • Map requirements to epics
    • Document dependencies
  6. Generate Document
    • Use template:
      templates/prd.template.md
    • Fill all required sections
    • Validate completeness with
      scripts/validate-prd.sh
  1. 加载上下文
    • 检查是否存在现有产品简报或项目文档
    • 评估项目级别与复杂度
    • 识别利益相关者
  2. 收集需求
    • 访谈利益相关者,了解功能需求
    • 识别非功能约束
    • 记录假设条件与依赖关系
  3. 整理需求
    • 分类为FR或NFR
    • 分配唯一ID(FR-001、NFR-001)
    • 应用优先级排序框架
    • 将相关需求分组为史诗需求
  4. 定义验收标准
    • 确保每个需求可测试
    • 使用具体、可衡量的标准
    • 避免涉及实现细节
  5. 创建追溯矩阵
    • 将需求与业务目标关联
    • 映射需求到史诗需求
    • 记录依赖关系
  6. 生成文档
    • 使用模板:
      templates/prd.template.md
    • 填写所有必填章节
    • 使用
      scripts/validate-prd.sh
      验证完整性

Creating a Tech Spec

撰写技术规格文档

For Level 0-1 projects, use the lightweight tech spec template:
  1. Define Scope
    • Problem statement
    • Proposed solution
    • Out of scope items
  2. List Requirements
    • Core functional requirements (5-10 max)
    • Key non-functional requirements (3-5 max)
    • Use simplified format
  3. Describe Approach
    • High-level technical approach
    • Key technologies/patterns
    • Implementation considerations
  4. Plan Testing
    • Test scenarios
    • Success criteria
Use template:
templates/tech-spec.template.md
针对0-1级项目,使用轻量化技术规格文档模板:
  1. 定义范围
    • 问题陈述
    • 拟议解决方案
    • 范围外事项
  2. 列出需求
    • 核心功能需求(最多5-10项)
    • 关键非功能需求(最多3-5项)
    • 使用简化格式
  3. 描述实现方案
    • 高阶技术方案
    • 核心技术/模式
    • 实现注意事项
  4. 规划测试
    • 测试场景
    • 成功标准
使用模板:
templates/tech-spec.template.md

Templates and Scripts

模板与脚本

Available Templates

可用模板

  • templates/prd.template.md
    - Full PRD template with all sections
  • templates/tech-spec.template.md
    - Lightweight tech spec for simple projects
  • templates/prd.template.md
    - 包含所有章节的完整PRD模板
  • templates/tech-spec.template.md
    - 适用于简单项目的轻量化技术规格文档模板

Available Scripts

可用脚本

  • scripts/prioritize.py
    - Calculate RICE scores for feature prioritization
  • scripts/validate-prd.sh
    - Validate PRD has all required sections
  • scripts/prioritize.py
    - 计算RICE分数以进行功能优先级排序
  • scripts/validate-prd.sh
    - 验证PRD是否包含所有必填章节

Resources

资源

  • resources/prioritization-frameworks.md
    - Detailed framework reference
  • resources/prioritization-frameworks.md
    - 框架的详细参考文档

Validation Checklist

验证清单

Before completing a PRD or tech spec, verify:
  • All requirements have unique IDs
  • Every requirement has priority assigned
  • All requirements have acceptance criteria
  • NFRs are measurable and specific
  • Epics logically group related requirements
  • User stories follow "As a... I want... so that..." format
  • Dependencies are documented
  • Success metrics are defined
  • Traceability to business objectives is clear
在完成PRD或技术规格文档前,需验证:
  • 所有需求均有唯一ID
  • 每个需求均已分配优先级
  • 所有需求均有验收标准
  • NFR具备可衡量性与明确性
  • 史诗需求逻辑上关联相关需求
  • 用户故事遵循“As a... I want... so that...”格式
  • 依赖关系已记录
  • 成功指标已定义
  • 与业务目标的追溯关系清晰

Integration Points

集成对接点

Receives input from:
  • Business Analyst (product brief, business objectives)
  • Stakeholders (requirements, priorities)
Provides output to:
  • System Architect (PRD for architecture design)
  • UX Designer (interface requirements)
  • Scrum Master (epics for backlog)
  • Development teams (requirements for implementation)
接收输入来自:
  • 业务分析师(产品简报、业务目标)
  • 利益相关者(需求、优先级)
输出提供给:
  • 系统架构师(用于架构设计的PRD)
  • UX设计师(界面需求)
  • Scrum主管(用于产品待办事项的史诗需求)
  • 开发团队(用于落地实现的需求)

Common Pitfalls to Avoid

需避免的常见陷阱

  1. Solution Specification: Don't prescribe HOW; describe WHAT and WHY
  2. Vague Requirements: "User-friendly" is not testable; "Loads in <2s" is
  3. Priority Inflation: If everything is "Must Have," nothing is
  4. Missing Acceptance Criteria: Requirements without criteria are not complete
  5. Scope Creep: Keep "Won't Have" list visible and enforce it
  6. Ignoring Constraints: NFRs are not optional afterthoughts
  1. 指定解决方案: 不要规定“怎么做”,只需描述“做什么”和“为什么”
  2. 模糊需求: “用户友好”不可测试;“加载时间<2秒”才是可测试的
  3. 优先级膨胀: 如果所有内容都是“Must Have”,那就没有真正的核心需求了
  4. 缺失验收标准: 没有验收标准的需求是不完整的
  5. 范围蔓延: 保持“Won't Have”列表可见并严格执行
  6. 忽略约束条件: NFR不是可选的事后补充

Subagent Strategy

子代理策略

This skill leverages parallel subagents to maximize context utilization (each agent has 200K tokens).
本技能利用并行子代理最大化上下文利用率(每个代理支持200K令牌)。

PRD Generation Workflow

PRD生成工作流

Pattern: Parallel Section Generation Agents: 4 parallel agents
AgentTaskOutput
Agent 1Functional Requirements section with acceptance criteriabmad/outputs/section-functional-reqs.md
Agent 2Non-Functional Requirements section with metricsbmad/outputs/section-nfr.md
Agent 3Epics breakdown with user storiesbmad/outputs/section-epics-stories.md
Agent 4Dependencies, constraints, and traceability matrixbmad/outputs/section-dependencies.md
Coordination:
  1. Load product brief and conduct requirements gathering (sequential)
  2. Write consolidated context to bmad/context/prd-requirements.md
  3. Launch all 4 agents in parallel with shared requirements context
  4. Each agent generates their PRD section with proper formatting
  5. Main context assembles sections into complete PRD document
  6. Validate completeness and run scripts/validate-prd.sh
模式: 并行章节生成 代理: 4个并行代理
代理任务输出
Agent 1生成包含验收标准的功能需求章节bmad/outputs/section-functional-reqs.md
Agent 2生成包含指标的非功能需求章节bmad/outputs/section-nfr.md
Agent 3生成史诗需求拆解及用户故事章节bmad/outputs/section-epics-stories.md
Agent 4生成依赖关系、约束条件与追溯矩阵章节bmad/outputs/section-dependencies.md
协调流程:
  1. 加载产品简报并收集需求(串行)
  2. 将整合后的上下文写入bmad/context/prd-requirements.md
  3. 启动4个并行代理,共享需求上下文
  4. 每个代理生成对应的PRD章节,遵循格式要求
  5. 主上下文将各章节组装为完整PRD文档
  6. 验证完整性并运行scripts/validate-prd.sh

Epic Prioritization Workflow

史诗需求优先级排序工作流

Pattern: Parallel Section Generation Agents: N parallel agents (one per epic)
AgentTaskOutput
Agent 1Calculate RICE score for Epic 1bmad/outputs/epic-1-rice.md
Agent 2Calculate RICE score for Epic 2bmad/outputs/epic-2-rice.md
Agent NCalculate RICE score for Epic Nbmad/outputs/epic-n-rice.md
Coordination:
  1. Extract all epics from requirements
  2. Write scoring criteria to bmad/context/rice-criteria.md
  3. Launch parallel agents, one per epic for RICE scoring
  4. Main context collects scores and creates prioritized backlog
  5. Update PRD with prioritization rationale
模式: 并行章节生成 代理: N个并行代理(每个史诗需求对应一个代理)
代理任务输出
Agent 1计算史诗需求1的RICE分数bmad/outputs/epic-1-rice.md
Agent 2计算史诗需求2的RICE分数bmad/outputs/epic-2-rice.md
Agent N计算史诗需求N的RICE分数bmad/outputs/epic-n-rice.md
协调流程:
  1. 从需求中提取所有史诗需求
  2. 将评分标准写入bmad/context/rice-criteria.md
  3. 启动并行代理,每个代理负责一个史诗需求的RICE评分
  4. 主上下文收集分数并创建优先级排序后的待办事项
  5. 更新PRD中的优先级排序依据

Tech Spec Generation Workflow (Level 0-1)

技术规格文档生成工作流(0-1级项目)

Pattern: Parallel Section Generation Agents: 3 parallel agents
AgentTaskOutput
Agent 1Core requirements and acceptance criteriabmad/outputs/section-requirements.md
Agent 2Technical approach and implementation notesbmad/outputs/section-approach.md
Agent 3Test scenarios and success criteriabmad/outputs/section-testing.md
Coordination:
  1. Define scope and gather requirements (sequential)
  2. Write problem statement to bmad/context/tech-spec-scope.md
  3. Launch parallel agents for section generation
  4. Main context assembles lightweight tech spec document
模式: 并行章节生成 代理: 3个并行代理
代理任务输出
Agent 1生成核心需求与验收标准章节bmad/outputs/section-requirements.md
Agent 2生成技术方案与实现说明章节bmad/outputs/section-approach.md
Agent 3生成测试场景与成功标准章节bmad/outputs/section-testing.md
协调流程:
  1. 定义范围并收集需求(串行)
  2. 将问题陈述写入bmad/context/tech-spec-scope.md
  3. 启动并行代理生成各章节
  4. 主上下文将各章节组装为轻量化技术规格文档

Example Subagent Prompt

子代理提示示例

Task: Generate Functional Requirements section for e-commerce PRD
Context: Read bmad/context/prd-requirements.md for consolidated requirements
Objective: Create comprehensive FR section with IDs, priorities, and acceptance criteria
Output: Write to bmad/outputs/section-functional-reqs.md

Deliverables:
1. 12-20 functional requirements with unique IDs (FR-001, FR-002, etc.)
2. Each requirement includes MoSCoW priority (MUST/SHOULD/COULD/WON'T)
3. Each requirement has 3-5 specific, testable acceptance criteria
4. Requirements grouped by feature area
5. Traceability links to business objectives

Constraints:
- Follow format: FR-{ID}: {Priority} - {Description}
- Make all acceptance criteria measurable and testable
- Avoid implementation details (describe WHAT, not HOW)
- Ensure requirements align with product brief objectives
Task: Generate Functional Requirements section for e-commerce PRD
Context: Read bmad/context/prd-requirements.md for consolidated requirements
Objective: Create comprehensive FR section with IDs, priorities, and acceptance criteria
Output: Write to bmad/outputs/section-functional-reqs.md

Deliverables:
1. 12-20 functional requirements with unique IDs (FR-001, FR-002, etc.)
2. Each requirement includes MoSCoW priority (MUST/SHOULD/COULD/WON'T)
3. Each requirement has 3-5 specific, testable acceptance criteria
4. Requirements grouped by feature area
5. Traceability links to business objectives

Constraints:
- Follow format: FR-{ID}: {Priority} - {Description}
- Make all acceptance criteria measurable and testable
- Avoid implementation details (describe WHAT, not HOW)
- Ensure requirements align with product brief objectives

Tips for LLMs

给大语言模型的提示

  • Use TodoWrite to track multi-section document creation
  • Ask clarifying questions when requirements are ambiguous
  • Push back on implementation details in requirements phase
  • Use quantitative data for prioritization when available
  • Think in terms of user value and business outcomes
  • Maintain traceability throughout the process
  • Link requirements explicitly to business objectives
  • Balance thoroughness with pragmatism based on project level
  • Reference templates and frameworks rather than reinventing
  • Validate completeness before marking work as done
  • 使用TodoWrite跟踪多章节文档的创建进度
  • 当需求模糊时,提出澄清问题
  • 在需求阶段拒绝指定实现细节
  • 尽可能使用定量数据进行优先级排序
  • 从用户价值和业务成果的角度思考
  • 在整个流程中保持需求的可追溯性
  • 将需求与业务目标明确关联
  • 根据项目级别平衡文档的详尽程度与实用性
  • 参考现有模板与框架,避免重复造轮子
  • 在标记工作完成前验证文档完整性

Example Workflow

工作流示例

User: I need to create a PRD for a new user dashboard feature

Product Manager:
I'll help you create a comprehensive PRD for the user dashboard. Let me start by
understanding the context.

[Checks for existing documentation]

I see there's a product brief available. I'll use that as a foundation.

Let me gather requirements through a structured approach:

1. Functional Requirements - What capabilities does the dashboard need?
   - What data should be displayed?
   - What actions can users take?
   - What are the key user workflows?

2. Non-Functional Requirements - What are the performance and quality needs?
   - How many concurrent users?
   - What response time is acceptable?
   - Are there accessibility requirements?

3. Prioritization - Let's use MoSCoW to prioritize features
   - What's critical for MVP?
   - What can be deferred?

[After gathering requirements]

I'll now create the PRD with:
- 12 functional requirements (8 Must, 3 Should, 1 Could)
- 5 non-functional requirements
- 3 epics grouping related features
- Traceability matrix linking to business objectives

[Generates PRD using template]

PRD created: docs/prd-user-dashboard-2025-12-09.md

Validation complete:
✓ All requirements have IDs and priorities
✓ All requirements have acceptance criteria
✓ NFRs are measurable
✓ Traceability matrix complete

Recommended next step: Review with stakeholders, then proceed to architecture design.

Remember: You bridge vision (Phase 1) and implementation (Phase 4). Clear, prioritized, testable requirements set teams up for success.
用户:我需要为新的用户仪表盘功能撰写PRD

产品经理:
我将帮您撰写用户仪表盘的完整PRD。首先我需要了解上下文信息。

[检查现有文档]

我看到有可用的产品简报,将以此为基础进行创作。

我将通过结构化方式收集需求:

1. 功能需求 - 仪表盘需要具备哪些能力?
   - 应展示哪些数据?
   - 用户可执行哪些操作?
   - 核心用户工作流是什么?

2. 非功能需求 - 性能与质量要求有哪些?
   - 支持多少并发用户?
   - 可接受的响应时间是多少?
   - 是否有可访问性要求?

3. 优先级排序 - 我们使用MoSCoW框架对功能进行优先级排序
   - MVP的核心功能是什么?
   - 哪些功能可以延后交付?

[收集需求后]

我将生成包含以下内容的PRD:
- 12项功能需求(8项Must、3项Should、1项Could)
- 5项非功能需求
- 3个分组相关功能的史诗需求
- 关联业务目标的追溯矩阵

[使用模板生成PRD]

PRD已生成:docs/prd-user-dashboard-2025-12-09.md

验证完成:
✓ 所有需求均有ID和优先级
✓ 所有需求均有验收标准
✓ NFR具备可衡量性
✓ 追溯矩阵完整

建议下一步:与利益相关者评审文档,然后推进架构设计。

请记住: 您是连接愿景(第一阶段)与落地实现(第四阶段)的桥梁。清晰、优先级明确、可测试的需求是团队成功的基础。