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Market Sizing Analysis

市场规模分析

Comprehensive market sizing methodologies for calculating Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for startup opportunities.
针对创业机会的Total Addressable Market（TAM，总潜在市场）、Serviceable Available Market（SAM，可服务可用市场）和Serviceable Obtainable Market（SOM，可服务可获得市场）的综合测算方法。

Use this skill when

适用场景

  • Working on market sizing analysis tasks or workflows
  • Needing guidance, best practices, or checklists for market sizing analysis
  • 进行市场规模分析任务或工作流时
  • 需要市场规模分析的指导、最佳实践或检查清单时

Do not use this skill when

不适用场景

  • The task is unrelated to market sizing analysis
  • You need a different domain or tool outside this scope
  • 任务与市场规模分析无关时
  • 需要此范围之外的其他领域或工具时

Instructions

操作说明

  • Clarify goals, constraints, and required inputs.
  • Apply relevant best practices and validate outcomes.
  • Provide actionable steps and verification.
  • If detailed examples are required, open 
    resources/implementation-playbook.md
    .
  • 明确目标、约束条件和所需输入。
  • 应用相关最佳实践并验证结果。
  • 提供可执行步骤和验证方法。
  • 如需详细示例，请打开
    resources/implementation-playbook.md
    。

Overview

概述

Market sizing provides the foundation for startup strategy, fundraising, and business planning. Calculate market opportunity using three complementary methodologies: top-down (industry reports), bottom-up (customer segment calculations), and value theory (willingness to pay).
市场规模测算是创业战略、融资和商业规划的基础。可通过三种互补方法测算市场机会：自上而下法（基于行业报告）、自下而上法（基于客户细分计算）和价值理论法（基于支付意愿）。

Core Concepts

核心概念

The Three-Tier Market Framework

三层市场框架

TAM (Total Addressable Market)
  • Total revenue opportunity if achieving 100% market share
  • Defines the universe of potential customers
  • Used for long-term vision and market validation
  • Example: All email marketing software revenue globally
SAM (Serviceable Available Market)
  • Portion of TAM targetable with current product/service
  • Accounts for geographic, segment, or capability constraints
  • Represents realistic addressable opportunity
  • Example: AI-powered email marketing for e-commerce in North America
SOM (Serviceable Obtainable Market)
  • Realistic market share achievable in 3-5 years
  • Accounts for competition, resources, and market dynamics
  • Used for financial projections and fundraising
  • Example: 2-5% of SAM based on competitive landscape
TAM（总潜在市场）
  • 占据100%市场份额时的总营收机会
  • 定义潜在客户的整体范围
  • 用于长期愿景规划和市场验证
  • 示例：全球所有电子邮件营销软件的营收
SAM（可服务可用市场）
  • 当前产品/服务可触达的TAM部分
  • 考虑地域、细分领域或能力限制
  • 代表实际可触达的市场机会
  • 示例：北美地区面向电商的AI驱动电子邮件营销市场
SOM（可服务可获得市场）
  • 3-5年内可实现的实际市场份额
  • 考虑竞争、资源和市场动态
  • 用于财务预测和融资
  • 示例：基于竞争格局，占据SAM的2-5%

When to Use Each Methodology

各方法的适用场景

Top-Down Analysis
  • Use when established market research exists
  • Best for mature, well-defined markets
  • Validates market existence and growth
  • Starts with industry reports and narrows down
Bottom-Up Analysis
  • Use when targeting specific customer segments
  • Best for new or niche markets
  • Most credible for investors
  • Builds from customer data and pricing
Value Theory
  • Use when creating new market categories
  • Best for disruptive innovations
  • Estimates based on value creation
  • Calculates willingness to pay for problem solution
自上而下分析法
  • 当已有成熟市场研究数据时使用
  • 最适合成熟、定义清晰的市场
  • 验证市场存在性和增长潜力
  • 从行业报告入手逐步缩小范围
自下而上分析法
  • 当针对特定客户细分领域时使用
  • 最适合新兴或小众市场
  • 对投资者而言可信度最高
  • 基于客户数据和定价逐步构建
价值理论法
  • 当创建新市场类别时使用
  • 最适合颠覆性创新
  • 基于创造的价值进行估算
  • 计算客户为解决问题的支付意愿

Three-Methodology Framework

三方法框架

Methodology 1: Top-Down Analysis

方法一：自上而下分析法

Start with total market size and narrow to addressable segments.
Process:
  1. Identify total market category from research reports
  2. Apply geographic filters (target regions)
  3. Apply segment filters (target industries/customers)
  4. Calculate competitive positioning adjustments
Formula:
TAM = Total Market Category Size
SAM = TAM × Geographic % × Segment %
SOM = SAM × Realistic Capture Rate (2-5%)
When to use: Established markets with available research (e.g., SaaS, fintech, e-commerce)
Strengths: Quick, uses credible data, validates market existence
Limitations: May overestimate for new categories, less granular
从整体市场规模入手，逐步缩小到可触达细分领域。
流程：
  1. 从研究报告中确定整体市场类别
  2. 应用地域筛选（目标区域）
  3. 应用细分领域筛选（目标行业/客户）
  4. 计算竞争定位调整值
公式：
TAM = Total Market Category Size
SAM = TAM × Geographic % × Segment %
SOM = SAM × Realistic Capture Rate (2-5%)
适用场景： 有研究数据可查的成熟市场（如SaaS、金融科技、电商）
优势： 快速高效，使用可信数据，验证市场存在性
局限性： 对新类别可能高估，颗粒度较粗

Methodology 2: Bottom-Up Analysis

方法二：自下而上分析法

Build market size from customer segment calculations.
Process:
  1. Define target customer segments
  2. Estimate number of potential customers per segment
  3. Determine average revenue per customer
  4. Calculate realistic penetration rates
Formula:
TAM = Σ (Segment Size × Annual Revenue per Customer)
SAM = TAM × (Segments You Can Serve / Total Segments)
SOM = SAM × Realistic Penetration Rate (Year 3-5)
When to use: B2B, niche markets, specific customer segments
Strengths: Most credible for investors, granular, defensible
Limitations: Requires detailed customer research, time-intensive
基于客户细分计算构建市场规模。
流程：
  1. 定义目标客户细分领域
  2. 估算每个细分领域的潜在客户数量
  3. 确定每位客户的平均营收
  4. 计算实际渗透速率
公式：
TAM = Σ (Segment Size × Annual Revenue per Customer)
SAM = TAM × (Segments You Can Serve / Total Segments)
SOM = SAM × Realistic Penetration Rate (Year 3-5)
适用场景： B2B、小众市场、特定客户细分领域
优势： 对投资者而言可信度最高，颗粒度细，论据充分
局限性： 需要详细的客户研究，耗时较长

Methodology 3: Value Theory

方法三：价值理论法

Calculate based on value created and willingness to pay.
Process:
  1. Identify problem being solved
  2. Quantify current cost of problem (time, money, inefficiency)
  3. Calculate value of solution (savings, gains, efficiency)
  4. Estimate willingness to pay (typically 10-30% of value)
  5. Multiply by addressable customer base
Formula:
Value per Customer = Problem Cost × % Solved by Solution
Price per Customer = Value × Willingness to Pay % (10-30%)
TAM = Total Potential Customers × Price per Customer
SAM = TAM × % Meeting Buy Criteria
SOM = SAM × Realistic Adoption Rate
When to use: New categories, disruptive innovations, unclear existing markets
Strengths: Shows value creation, works for new markets
Limitations: Requires assumptions, harder to validate
基于创造的价值和支付意愿进行计算。
流程：
  1. 明确要解决的问题
  2. 量化当前问题的成本（时间、资金、低效）
  3. 计算解决方案的价值（节省、收益、效率提升）
  4. 估算支付意愿（通常为价值的10-30%）
  5. 乘以可触达客户基数
公式：
Value per Customer = Problem Cost × % Solved by Solution
Price per Customer = Value × Willingness to Pay % (10-30%)
TAM = Total Potential Customers × Price per Customer
SAM = TAM × % Meeting Buy Criteria
SOM = SAM × Realistic Adoption Rate
适用场景： 新类别、颠覆性创新、现有市场不明确的情况
优势： 体现价值创造，适用于新市场
局限性： 需要假设，验证难度大

Step-by-Step Process

分步流程

Step 1: Define the Market

步骤1：定义市场

Clearly specify what market is being measured.
Questions to answer:
  • What problem is being solved?
  • Who are the target customers?
  • What's the product/service category?
  • What's the geographic scope?
  • What's the time horizon?
Example:
  • Problem: E-commerce companies struggle with email marketing automation
  • Customers: E-commerce stores with >$1M annual revenue
  • Category: AI-powered email marketing software
  • Geography: North America initially, global expansion
  • Horizon: 3-5 year opportunity
明确要测算的市场范围。
需回答的问题：
  • 要解决什么问题？
  • 目标客户是谁？
  • 产品/服务类别是什么？
  • 地域范围是什么？
  • 时间跨度是什么？
示例：
  • 问题：电商企业在电子邮件营销自动化方面存在困难
  • 客户：年营收超过100万美元的电商店铺
  • 类别：AI驱动的电子邮件营销软件
  • 地域：初期为北美，后续全球扩张
  • 跨度：3-5年的市场机会

Step 2: Gather Data Sources

步骤2：收集数据源

Identify credible data for calculations.
Top-Down Sources:
  • Industry research reports (Gartner, Forrester, IDC)
  • Government statistics (Census, BLS, trade associations)
  • Public company filings and earnings
  • Market research firms (Statista, CB Insights, PitchBook)
Bottom-Up Sources:
  • Customer interviews and surveys
  • Sales data and CRM records
  • Industry databases (LinkedIn, ZoomInfo, Crunchbase)
  • Competitive intelligence
  • Academic research
Value Theory Sources:
  • Customer problem quantification
  • Time/cost studies
  • ROI case studies
  • Pricing research and willingness-to-pay surveys
确定用于计算的可信数据。
自上而下数据源：
  • 行业研究报告（Gartner、Forrester、IDC）
  • 政府统计数据（人口普查局、劳工统计局、行业协会）
  • 上市公司 filings 和财报
  • 市场研究公司（Statista、CB Insights、PitchBook）
自下而上数据源：
  • 客户访谈和调研
  • 销售数据和CRM记录
  • 行业数据库（LinkedIn、ZoomInfo、Crunchbase）
  • 竞争情报
  • 学术研究
价值理论数据源：
  • 客户问题量化数据
  • 时间/成本研究
  • ROI案例研究
  • 定价研究和支付意愿调研

Step 3: Calculate TAM

步骤3：计算TAM

Apply chosen methodology to determine total market.
For Top-Down:
  1. Find total category size from research
  2. Document data source and year
  3. Apply growth rate if needed
  4. Validate with multiple sources
For Bottom-Up:
  1. Count total potential customers
  2. Calculate average annual revenue per customer
  3. Multiply to get TAM
  4. Break down by segment
For Value Theory:
  1. Quantify total addressable customer base
  2. Calculate value per customer
  3. Estimate pricing based on value
  4. Multiply for TAM
应用选定方法确定整体市场规模。
自上而下法：
  1. 从研究中找到整体类别规模
  2. 记录数据源和年份
  3. 如有需要应用增长率
  4. 用多个数据源验证
自下而上法：
  1. 统计潜在客户总数
  2. 计算每位客户的平均年营收
  3. 相乘得到TAM
  4. 按细分领域拆分
价值理论法：
  1. 量化总可触达客户基数
  2. 计算每位客户的价值
  3. 基于价值估算定价
  4. 相乘得到TAM

Step 4: Calculate SAM

步骤4：计算SAM

Narrow TAM to serviceable addressable market.
Apply Filters:
  • Geographic constraints (regions you can serve)
  • Product limitations (features you currently have)
  • Customer requirements (size, industry, use case)
  • Distribution channel access
  • Regulatory or compliance restrictions
Formula:
SAM = TAM × (% matching all filters)
Example:
  • TAM: $10B global email marketing
  • Geographic filter: 40% (North America)
  • Product filter: 30% (e-commerce focus)
  • Feature filter: 60% (need AI capabilities)
  • SAM = $10B × 0.40 × 0.30 × 0.60 = $720M
将TAM缩小到可服务的可触达市场。
应用筛选条件：
  • 地域限制（可服务的区域）
  • 产品限制（当前拥有的功能）
  • 客户要求（规模、行业、使用场景）
  • 分销渠道准入
  • 监管或合规限制
公式：
SAM = TAM × (% matching all filters)
示例：
  • TAM：全球电子邮件营销市场100亿美元
  • 地域筛选：40%（北美）
  • 产品筛选：30%（聚焦电商）
  • 功能筛选：60%（需要AI能力）
  • SAM = 100亿美元 × 0.40 × 0.30 × 0.60 = 7.2亿美元

Step 5: Calculate SOM

步骤5：计算SOM

Determine realistic obtainable market share.
Consider:
  • Current market share of competitors
  • Typical market share for new entrants (2-5%)
  • Resources available (funding, team, time)
  • Go-to-market effectiveness
  • Competitive advantages
  • Time to achieve (3-5 years typically)
Conservative Approach:
SOM (Year 3) = SAM × 2%
SOM (Year 5) = SAM × 5%
Example:
  • SAM: $720M
  • Year 3 SOM: $720M × 2% = $14.4M
  • Year 5 SOM: $720M × 5% = $36M
确定实际可获得的市场份额。
需考虑：
  • 竞争对手当前的市场份额
  • 新进入者的典型市场份额（2-5%）
  • 可用资源（资金、团队、时间）
  • 上市策略的有效性
  • 竞争优势
  • 实现时间（通常3-5年）
保守计算方法：
SOM (Year 3) = SAM × 2%
SOM (Year 5) = SAM × 5%
示例：
  • SAM：7.2亿美元
  • 第3年SOM：7.2亿美元 × 2% = 1440万美元
  • 第5年SOM：7.2亿美元 × 5% = 3600万美元

Step 6: Validate and Triangulate

步骤6：验证与三角校验

Cross-check using multiple methods.
Validation Techniques:
  1. Compare top-down and bottom-up results (should be within 30%)
  2. Check against public company revenues in space
  3. Validate customer count assumptions
  4. Sense-check pricing assumptions
  5. Review with industry experts
  6. Compare to similar market categories
Red Flags:
  • TAM that's too small (< $1B for VC-backed startups)
  • TAM that's too large (unsupported by data)
  • SOM that's too aggressive (> 10% in 5 years for new entrant)
  • Inconsistency between methodologies (> 50% difference)
使用多种方法交叉验证。
验证技巧：
  1. 对比自上而下和自下而上的结果（差异应在30%以内）
  2. 与该领域上市公司营收对比
  3. 验证客户数量假设
  4. 合理性检查定价假设
  5. 与行业专家复核
  6. 与类似市场类别对比
警示信号：
  • TAM过小（风投支持的创业公司通常需超过10亿美元）
  • TAM过大（无数据支持）
  • SOM过于激进（新进入者5年内超过10%）
  • 方法间差异过大（超过50%）

Industry-Specific Considerations

行业特定考量

SaaS Markets

SaaS市场

Key Metrics:
  • Number of potential businesses in target segment
  • Average contract value (ACV)
  • Typical market penetration rates
  • Expansion revenue potential
TAM Calculation:
TAM = Total Target Companies × Average ACV × (1 + Expansion Rate)
关键指标：
  • 目标细分领域的潜在企业数量
  • 平均合同价值（ACV）
  • 典型市场渗透率
  • 扩展营收潜力
TAM计算公式：
TAM = Total Target Companies × Average ACV × (1 + Expansion Rate)

Marketplace Markets

平台型市场

Key Metrics:
  • Gross Merchandise Value (GMV) of category
  • Take rate (% of GMV you capture)
  • Total transactions or users
TAM Calculation:
TAM = Total Category GMV × Expected Take Rate
关键指标：
  • 品类的商品交易总额（GMV）
  • 抽成率（GMV中你能获取的比例）
  • 总交易数或用户数
TAM计算公式：
TAM = Total Category GMV × Expected Take Rate

Consumer Markets

消费市场

Key Metrics:
  • Total addressable users/households
  • Average revenue per user (ARPU)
  • Engagement frequency
TAM Calculation:
TAM = Total Users × ARPU × Purchase Frequency per Year
关键指标：
  • 总可触达用户/家庭数
  • 每用户平均营收（ARPU）
  • 参与频率
TAM计算公式：
TAM = Total Users × ARPU × Purchase Frequency per Year

B2B Services

B2B服务市场

Key Metrics:
  • Number of target companies by size/industry
  • Average project value or retainer
  • Typical buying frequency
TAM Calculation:
TAM = Total Target Companies × Average Deal Size × Deals per Year
关键指标：
  • 按规模/行业划分的目标企业数量
  • 平均项目价值或服务费
  • 典型购买频率
TAM计算公式：
TAM = Total Target Companies × Average Deal Size × Deals per Year

Presenting Market Sizing

市场规模分析的呈现

For Investors

面向投资者

Structure:
  1. Market definition and problem scope
  2. TAM/SAM/SOM with methodology
  3. Data sources and assumptions
  4. Growth projections and drivers
  5. Competitive landscape context
Key Points:
  • Lead with bottom-up calculation (most credible)
  • Show triangulation with top-down
  • Explain conservative assumptions
  • Link to revenue projections
  • Highlight market growth rate
结构：
  1. 市场定义和问题范围
  2. TAM/SAM/SOM及测算方法
  3. 数据源和假设
  4. 增长预测和驱动因素
  5. 竞争格局背景
关键点：
  • 以自下而上计算为核心（可信度最高）
  • 展示与自上而下法的三角校验
  • 说明保守假设
  • 关联营收预测
  • 突出市场增长率

For Strategy

面向战略规划

Structure:
  1. Addressable customer segments
  2. Prioritization by opportunity size
  3. Entry strategy by segment
  4. Expected penetration timeline
  5. Resource requirements
Key Points:
  • Focus on SAM and SOM
  • Show segment-level detail
  • Connect to go-to-market plan
  • Identify expansion opportunities
  • Discuss competitive positioning
结构：
  1. 可触达客户细分领域
  2. 按机会规模优先级排序
  3. 按细分领域的进入策略
  4. 预期渗透时间表
  5. 资源需求
关键点：
  • 聚焦SAM和SOM
  • 展示细分领域细节
  • 关联上市计划
  • 识别扩张机会
  • 讨论竞争定位

Common Mistakes to Avoid

需避免的常见错误

Mistake 1: Confusing TAM with SAM
  • Don't claim entire market as addressable
  • Apply realistic product/geographic constraints
  • Be honest about serviceable market
Mistake 2: Overly Aggressive SOM
  • New entrants rarely capture > 5% in 5 years
  • Account for competition and resources
  • Show realistic ramp timeline
Mistake 3: Using Only Top-Down
  • Investors prefer bottom-up validation
  • Top-down alone lacks credibility
  • Always triangulate with multiple methods
Mistake 4: Cherry-Picking Data
  • Use consistent, recent data sources
  • Don't mix methodologies inappropriately
  • Document all assumptions clearly
Mistake 5: Ignoring Market Dynamics
  • Account for market growth/decline
  • Consider competitive intensity
  • Factor in switching costs and barriers
错误1：混淆TAM与SAM
  • 不要将整个市场宣称为可触达市场
  • 应用实际的产品/地域限制
  • 如实说明可服务市场规模
错误2：SOM过于激进
  • 新进入者很少能在5年内获得超过5%的份额
  • 考虑竞争和资源情况
  • 展示实际的增长时间表
错误3：仅使用自上而下法
  • 投资者更偏好自下而上的验证
  • 仅用自上而下法缺乏可信度
  • 始终用多种方法进行三角校验
错误4：选择性使用数据
  • 使用一致、最新的数据源
  • 不要不当混合方法
  • 清晰记录所有假设
错误5：忽略市场动态
  • 考虑市场增长/衰退情况
  • 考虑竞争强度
  • 纳入转换成本和壁垒因素

Additional Resources

额外资源

Reference Files

参考文件

For detailed methodologies and frameworks:
  • references/methodology-deep-dive.md
     - Comprehensive guide to each methodology with step-by-step worksheets
  • references/data-sources.md
     - Curated list of market research sources, databases, and tools
  • references/industry-templates.md
     - Specific templates for SaaS, marketplace, consumer, B2B, and fintech markets
如需详细方法和框架：
  • references/methodology-deep-dive.md
     - 各方法的综合指南，含分步工作表
  • references/data-sources.md
     - 精选的市场研究数据源、数据库和工具列表
  • references/industry-templates.md
     - 针对SaaS、平台型、消费、B2B和金融科技市场的特定模板

Example Files

示例文件

Working examples with complete calculations:
  • examples/saas-market-sizing.md
     - Complete TAM/SAM/SOM for a B2B SaaS product
  • examples/marketplace-sizing.md
     - Marketplace platform market opportunity calculation
  • examples/value-theory-example.md
     - Value-based market sizing for disruptive innovation
Use these examples as templates for your own market sizing analysis. Each includes real numbers, data sources, and assumptions documented clearly.
含完整计算的实战示例：
  • examples/saas-market-sizing.md
     - B2B SaaS产品的完整TAM/SAM/SOM测算
  • examples/marketplace-sizing.md
     - 平台型市场的机会测算
  • examples/value-theory-example.md
     - 颠覆性创新的基于价值的市场规模测算
将这些示例作为你自己市场规模分析的模板。每个示例都包含真实数据、数据源和明确记录的假设。

Quick Start

快速入门

To perform market sizing analysis:
  1. Define the market - Problem, customers, category, geography
  2. Choose methodology - Bottom-up (preferred) or top-down + triangulation
  3. Gather data - Industry reports, customer data, competitive intelligence
  4. Calculate TAM - Apply methodology formula
  5. Narrow to SAM - Apply product, geographic, segment filters
  6. Estimate SOM - 2-5% realistic capture rate
  7. Validate - Cross-check with alternative methods
  8. Document - Show methodology, sources, assumptions
  9. Present - Structure for audience (investors, strategy, operations)
For detailed step-by-step guidance on each methodology, reference the files in 
references/
directory. For complete worked examples, see 
examples/
directory.
进行市场规模分析的步骤：
  1. 定义市场 - 问题、客户、品类、地域
  2. 选择方法 - 自下而上法（首选）或自上而下法+三角校验
  3. 收集数据 - 行业报告、客户数据、竞争情报
  4. 计算TAM - 应用方法公式
  5. 缩小到SAM - 应用产品、地域、细分领域筛选
  6. 估算SOM - 2-5%的实际获取率
  7. 验证 - 用替代方法交叉检查
  8. 记录 - 展示方法、数据源、假设
  9. 呈现 - 根据受众（投资者、战略、运营）调整结构
如需各方法的详细分步指导，请参考
references/
目录下的文件。如需完整实战示例，请查看
examples/
目录。

Limitations

局限性

  • Use this skill only when the task clearly matches the scope described above.
  • Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
  • Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
  • 仅当任务明确符合上述范围时使用此技能。
  • 不要将输出结果替代为针对特定环境的验证、测试或专家评审。
  • 如果所需输入、权限、安全边界或成功标准缺失，请暂停并请求澄清。