biz-bcg-matrix
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ChineseBCG Growth-Share Matrix
BCG Growth-Share Matrix
Overview
概述
The BCG Matrix classifies products or business units into four quadrants based on market growth rate (Y-axis) and relative market share (X-axis). It guides resource allocation: where to invest, where to harvest cash, and what to divest.
BCG Matrix根据市场增长率（Y轴）和相对市场份额（X轴）将产品或业务单元划分为四个象限，为资源分配提供指导：确定投资方向、现金收割领域以及剥离对象。
When to Use
适用场景
Trigger conditions:
- User managing multiple products or business units and needs to prioritize
- User asks "which products should we invest in vs cut?"
- User needs a portfolio-level view of their business
- User mentions "cash cow", "star product", or "portfolio strategy"
When NOT to use:
- For single-product strategy → use SWOT or Blue Ocean
- For industry-level analysis → use Porter's Five Forces
- When detailed financial modeling is needed → use DCF or financial ratios
触发条件：
- 用户管理多个产品或业务单元，需要确定优先级
- 用户询问“我们应该投资哪些产品，砍掉哪些？”
- 用户需要从组合层面审视业务
- 用户提及“cash cow”、“star product”或“portfolio strategy”
不适用场景：
- 单一产品战略分析 → 使用SWOT或蓝海战略
- 行业层面分析 → 使用波特五力模型
- 需要详细财务建模时 → 使用DCF或财务比率
Framework
框架规则
IRON LAW: Relative Market Share, Not Absolute
The X-axis is RELATIVE market share = your share / largest competitor's share.
A company with 20% share in a market where the leader has 40% = 0.5x (Low).
A company with 20% share where the next largest has 10% = 2.0x (High).
NEVER use absolute market share. A 30% share means nothing without knowing
the leader's share.IRON LAW: Plot THEN Strategize
Place ALL products/units on the matrix BEFORE deciding strategy.
Portfolio balance matters — a company with only Stars has a cash crisis
(Stars consume cash). A company with only Cash Cows has no growth pipeline.IRON LAW: Relative Market Share, Not Absolute
The X-axis is RELATIVE market share = your share / largest competitor's share.
A company with 20% share in a market where the leader has 40% = 0.5x (Low).
A company with 20% share where the next largest has 10% = 2.0x (High).
NEVER use absolute market share. A 30% share means nothing without knowing
the leader's share.IRON LAW: Plot THEN Strategize
Place ALL products/units on the matrix BEFORE deciding strategy.
Portfolio balance matters — a company with only Stars has a cash crisis
(Stars consume cash). A company with only Cash Cows has no growth pipeline.Step 1: Define the Portfolio Units
步骤1：定义组合单元
List all products, product lines, or business units to analyze. Each must be:
- A distinct unit with its own market and competitors
- Measurable in terms of revenue, market share, and market growth
列出所有需要分析的产品、产品线或业务单元。每个单元必须：
- 是拥有独立市场和竞争对手的独特单元
- 可通过收入、市场份额和市场增长率进行量化
Step 2: Gather Data for Each Unit
步骤2：收集各单元数据
For each unit, determine:
- Market growth rate: Annual growth rate of the total market (not your revenue growth). Typically, >10% = High growth.
- Relative market share: Your market share ÷ largest competitor's market share. >1.0x = High.
针对每个单元，确定：
- 市场增长率：整个市场的年增长率（而非自身收入增长率）。通常，增长率>10%视为高增长。
- 相对市场份额：自身市场份额 ÷ 最大竞争对手的市场份额。比值>1.0视为高份额。
Step 3: Plot on the Matrix
步骤3：在矩阵中定位
| High Relative Market Share | Low Relative Market Share | |
|---|---|---|
| High Market Growth | ⭐ Stars — High share in growing market. Generate revenue but consume cash to maintain position. | ❓ Question Marks — Low share in growing market. Need heavy investment to gain share, or divest. |
| Low Market Growth | 🐄 Cash Cows — High share in mature market. Generate surplus cash with low investment needed. | 🐕 Dogs — Low share in slow market. Minimal cash generation, limited potential. |
| 高相对市场份额 | 低相对市场份额 | |
|---|---|---|
| 高市场增长率 | ⭐ Stars — 在增长型市场中占据高份额，能产生收入但需要消耗现金以维持地位。 | ❓ Question Marks — 在增长型市场中占据低份额，需要大量投资以提升份额，或考虑剥离。 |
| 低市场增长率 | 🐄 Cash Cows — 在成熟市场中占据高份额，只需少量投资就能产生超额现金。 | 🐕 Dogs — 在低速增长市场中占据低份额，现金生成极少，潜力有限。 |
Step 4: Determine Strategy per Quadrant
步骤4：确定各象限战略
| Quadrant | Default Strategy | Nuance |
|---|---|---|
| Stars | Invest to maintain/grow share | Will become Cash Cows as market matures |
| Cash Cows | Harvest — maximize cash extraction with minimal investment | Fund Stars and selected Question Marks |
| Question Marks | Selective invest OR divest — pick winners, cut losers | Most critical decision — not all can become Stars |
| Dogs | Divest or reposition | May keep if synergies with other units exist |
| 象限 | 默认战略 | 细节说明 |
|---|---|---|
| Stars | 投资以维持/提升份额 | 随着市场成熟，将转变为Cash Cows |
| Cash Cows | 收割 — 以最少投资最大化现金提取 | 为Stars和选定的Question Marks提供资金 |
| Question Marks | 选择性投资或剥离 — 筛选优胜者，淘汰失败者 | 最关键的决策——并非所有单元都能成为Stars |
| Dogs | 剥离或重新定位 | 若与其他单元存在协同效应，可考虑保留 |
Step 5: Assess Portfolio Balance
步骤5：评估组合平衡性
Check the overall portfolio health:
- Healthy: Mix of Cash Cows (funding) + Stars (growth) + 1-2 Question Marks (pipeline)
- Unhealthy: All Cash Cows (no growth), all Stars (cash drain), all Dogs (declining)
检查整体组合健康状况：
- 健康组合：Cash Cows（资金来源） + Stars（增长动力） + 1-2个Question Marks（增长储备）的组合
- 不健康组合：全为Cash Cows（无增长）、全为Stars（现金消耗过大）、全为Dogs（持续衰退）
Output Format
输出格式
markdown
undefinedmarkdown
undefinedBCG Matrix Analysis: {Company/Portfolio}
BCG Matrix Analysis: {Company/Portfolio}
Portfolio Units
Portfolio Units
| Unit | Revenue | Market Growth | Rel. Market Share | Quadrant |
|---|---|---|---|---|
| {Product A} | {$X} | {X%} | {X.Xx} | Star/Cash Cow/QM/Dog |
| Unit | Revenue | Market Growth | Rel. Market Share | Quadrant |
|---|---|---|---|---|
| {Product A} | {$X} | {X%} | {X.Xx} | Star/Cash Cow/QM/Dog |
BCG Matrix Placement
BCG Matrix Placement
| High Share (>1.0x) | Low Share (<1.0x) | |
|---|---|---|
| High Growth (>10%) | ⭐ {list Stars} | ❓ {list Question Marks} |
| Low Growth (<10%) | 🐄 {list Cash Cows} | 🐕 {list Dogs} |
| High Share (>1.0x) | Low Share (<1.0x) | |
|---|---|---|
| High Growth (>10%) | ⭐ {list Stars} | ❓ {list Question Marks} |
| Low Growth (<10%) | 🐄 {list Cash Cows} | 🐕 {list Dogs} |
Strategic Recommendations
Strategic Recommendations
Stars — Invest
Stars — Invest
- {Product}: {specific investment recommendation}
- {Product}: {specific investment recommendation}
Cash Cows — Harvest
Cash Cows — Harvest
- {Product}: {how to maximize cash extraction}
- {Product}: {how to maximize cash extraction}
Question Marks — Decide
Question Marks — Decide
- {Product}: Invest / Divest — {rationale}
- {Product}: Invest / Divest — {rationale}
Dogs — Divest/Reposition
Dogs — Divest/Reposition
- {Product}: {recommendation}
- {Product}: {recommendation}
Portfolio Health Assessment
Portfolio Health Assessment
{Overall balance evaluation and rebalancing recommendations}
undefined{Overall balance evaluation and rebalancing recommendations}
undefinedExamples
示例
Correct Application
正确应用
Scenario: BCG for a Taiwanese electronics company with 4 product lines
| Unit | Market Growth | Rel. Share | Quadrant | Reasoning |
|---|---|---|---|---|
| Laptop line | 3% | 1.8x (leader) | Cash Cow ✓ | Mature market, dominant position |
| Gaming peripherals | 18% | 0.4x | Question Mark ✓ | Fast-growing but small player |
| Server components | 12% | 1.2x | Star ✓ | Growing market, leading position |
| Feature phones | -2% | 0.3x | Dog ✓ | Declining market, minimal share |
Strategy: Harvest Laptop cash → fund Server (maintain Star) + selective invest in Gaming (Question Mark with potential). Divest Feature phones.
场景： 某台湾电子公司的4条产品线BCG分析
| 单元 | 市场增长率 | 相对份额 | 象限 | 理由 |
|---|---|---|---|---|
| 笔记本电脑产品线 | 3% | 1.8x（行业领先） | Cash Cow ✓ | 市场成熟，占据主导地位 |
| 游戏外设 | 18% | 0.4x | Question Mark ✓ | 市场增长迅速，但自身份额较小 |
| 服务器组件 | 12% | 1.2x | Star ✓ | 市场增长，占据领先地位 |
| 功能手机 | -2% | 0.3x | Dog ✓ | 市场衰退，份额极小 |
战略：从笔记本电脑产品线收割现金 → 为服务器组件（维持Star地位）提供资金，并选择性投资游戏外设（有潜力的Question Mark）。剥离功能手机业务。
Incorrect Application
错误应用
Scenario: Same company
What went wrong:
- Used absolute market share (25%) instead of relative (25% / leader's 30% = 0.83x) → Would misclassify as High Share when it's actually Low. Violates Iron Law.
- Decided "invest in everything" without plotting first → No portfolio trade-off analysis. Violates Iron Law: plot then strategize.
场景： 同一家公司
问题所在：
- 使用绝对市场份额（25%）而非相对份额（25% / 行业领先者的30% = 0.83x）→ 会错误地将其归类为高份额，实际为低份额，违反了铁律。
- 未先在矩阵中定位就决定“全面投资”→ 未进行组合权衡分析，违反了“先定位再制定战略”的铁律。
Gotchas
注意事项
- Market growth ≠ your revenue growth: A product growing 20% in a market growing 25% is losing share. Use market growth rate, not company revenue growth.
- Relative share threshold: The 1.0x cutoff is a guideline. In fragmented markets with no clear leader, adjust the threshold. Document your reasoning.
- BCG is a snapshot: Markets evolve. Stars become Cash Cows, Question Marks become Dogs. Reassess annually.
- BCG ignores synergies: A "Dog" that provides key components to a "Star" may be worth keeping. Factor in cross-unit dependencies.
- Not all Question Marks can be funded: The hardest decision. Use additional criteria (market fit, team capability, strategic importance) to choose which to invest in.
- 市场增长率≠自身收入增长率：某产品自身增长20%，但所在市场增长25%，实际上是在丢失份额。请使用市场增长率，而非公司收入增长率。
- 相对份额阈值：1.0x的分界值仅为参考。在无明确领先者的碎片化市场中，可调整阈值并记录理由。
- BCG是快照：市场不断演变，Stars会变成Cash Cows，Question Marks会变成Dogs。建议每年重新评估。
- BCG忽略协同效应：为Star提供关键组件的Dog可能值得保留。需考虑跨单元的依赖关系。
- 并非所有Question Marks都能获得资金：这是最艰难的决策。需结合额外标准（市场适配度、团队能力、战略重要性）筛选投资对象。
References
参考资料
- For GE-McKinsey Matrix as an alternative (multi-factor version), see
references/ge-mckinsey.md - For comparison with other strategy frameworks, see
references/framework-comparison.md
- 如需替代框架（多因素版本）GE-McKinsey Matrix，请查看
references/ge-mckinsey.md - 如需与其他战略框架对比，请查看
references/framework-comparison.md