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32 · Business · Market Research

Market Sizing Research Methods

Plan TAM/SAM/SOM estimates, survey sampling and segment evaluation.

marktgroessenmethodikmarket-research

Market Research Methodology — TAM / SAM / SOM · Original SKILL.md

---
name: market-research
description: Use when doing upstream market-research methodology — sizing a market as TAM/SAM/SOM computed BOTH top-down and bottoms-up (never a single unsourced number), planning a survey sample size with finite-population correction and per-segment minimums, or scoring candidate market segments against Kotler's measurable/substantial/accessible/differentiable/actionable criteria. Outputs always show the method and the assumptions. For market-research analysts and product-marketing at the sizing/survey/segmentation moment. Distinct from marketing-skill (campaign analytics, attribution, demand-gen) — this is the evidence-building methodology, not live-campaign optimization.
version: 2.9.0
author: claude-code-skills
license: MIT
tags: [research-ops, market-research, tam-sam-som, market-sizing, survey, sampling, segmentation, competitive-intelligence]
compatible_tools: [claude-code, codex-cli, cursor, antigravity, opencode, gemini-cli]
---

# market-research

Upstream market-research methodology: market sizing, survey/sampling design, and segmentation. The discipline here is **method + assumptions**: a TAM is never a single number, a survey is never powered only in aggregate, and a segment is never a demographic slice.

## Purpose

Market-research analysts, product marketers, and strategy teams need rigorous evidence *before* anyone optimizes a campaign or sets a strategy. This skill structures three methodology decisions:

Three deterministic tools:

1. `market_sizer.py` — Computes TAM/SAM/SOM by **both** top-down and bottoms-up methods side-by-side, reports the divergence, and flags failed triangulation. Never returns a single number.
2. `sample_size_planner.py` — Survey sample size from confidence, margin of error, and expected proportion, with the finite-population correction and **per-segment minimums** (a survey powered overall is not powered per reported segment).
3. `segmentation_scorer.py` — Scores candidate segments against Kotler's five criteria and enforces a substantiality + accessibility gate; a slice that is too small or unreachable is dropped.

## When to use

Invoke this skill when:

- A board or exec asks "how big is this market?" and you need a defensible, triangulated answer.
- You are fielding a survey and need a sample size that holds up per segment, not just overall.
- You have a list of candidate segments and need to know which are real markets vs demographic slices.
- You are synthesizing competitive intelligence and need a methodological backbone.

**Do NOT use this skill to**: measure a live campaign (attribution, ROAS, CPA → `marketing-skill/campaign-analytics`), build demand-gen / paid-media plans (`marketing-skill/marketing-demand-acquisition`), set positioning / GTM strategy (`marketing-skill/marketing-strategy-pmm`), or set pricing (`commercial/pricing-strategist`).

## Workflow

1. **Write the brief** — Fill `assets/market_research_brief_template.md` (objective, the decision this informs, sizing approach, sampling plan, assumptions register).
2. **Size the market** — Run `market_sizer.py --input market.json --method both --profile {b2b-saas|consumer|enterprise|marketplace|hardware|services}`. Reconcile the top-down/bottoms-up delta before quoting anything.
3. **Plan the survey** — Run `sample_size_planner.py --input survey.json`. Fund the per-segment floors, not just the overall n.
4. **Score the segments** — Run `segmentation_scorer.py --input segments.json --profile <same>`. Drop segments failing the substantiality/accessibility gate.
5. **Assemble the evidence pack** — Combine into a brief. Every number carries its method + assumptions + confidence.

## Scripts

| Script | Purpose | Profiles |
|---|---|---|
| `scripts/market_sizer.py` | TAM/SAM/SOM top-down AND bottoms-up + triangulation flag | b2b-saas, consumer, enterprise, marketplace, hardware, services |
| `scripts/sample_size_planner.py` | Survey n + FPC + per-segment minima | n/a (parameter-driven) |
| `scripts/segmentation_scorer.py` | Kotler 5-criteria scoring + gate | b2b-saas, consumer, enterprise, marketplace, hardware, services |

All three: stdlib-only, `--help`, `--sample`, `--output {human,json}`.

## Onboarding & customization

Run the onboarding questionnaire **once before you start** — it captures your defaults so every tool in this skill is pre-configured. Customization is the point: the answers actually change tool behavior.

```bash
python3 scripts/onboard.py            # interactive (also: --defaults, --set key=value, --reset)
python3 scripts/onboard.py --show     # see the questions + current effective config
```

Answers are saved to `~/.config/research-ops/market-research.json` (global) or `./.research-ops/market-research.json` (`--scope project`) and are read automatically by `config_loader.py`. They set the default market **profile**, the default survey **confidence** and **margin of error**, and the default **sizing method**. CLI flags always override saved config; `RESEARCH_OPS_NO_CONFIG=1` ignores it.

**The four questions:** market profile · survey confidence · margin of error · sizing method.

## Optimize with autoresearch (opt-in)

This skill ships an **isolated, opt-in** bridge to `engineering/autoresearch-agent`. Only when you ask to "optimize" / "reconcile the sizing" / "run a loop" does an autoresearch experiment iteratively reconcile your market model so top-down and bottoms-up triangulate. `scripts/ar_evaluator.py` is the ground-truth evaluator; it prints `tam_divergence: <fraction>` (**lower** is better).

```bash
/ar:setup --domain custom --name tam-triangulation \
  --target market.json \
  --eval "python3 ar_evaluator.py --target market.json" \
  --metric tam_divergence --direction lower
/ar:loop custom/tam-triangulation
```

Isolated: no hard dependency — autoresearch runs only on demand, and the loop edits `market.json`, never the evaluator.

## References

- `references/market_sizing_canon.md` — TAM/SAM/SOM frameworks (Bessemer, a16z); top-down vs bottoms-up; Fermi estimation; market-model conventions; common sizing fallacies.
- `references/survey_methodology.md` — Cochran *Sampling Techniques*; Dillman *Tailored Design Method*; Groves *Survey Methodology*; question-wording bias (Schuman & Presser); AAPOR standards.
- `references/segmentation_and_ci.md` — Kotler segmentation criteria; needs-based vs firmographic; Porter Five Forces; SCIP ethics; Christensen JTBD; conjoint/MaxDiff primer.

## Assumptions

- The sizer reports both methods but cannot validate your inputs — a top-down "1% of a $40B market" is only as good as the cited source and the serviceable fraction.
- Sample-size uses the conservative p=0.5 (maximum variance) unless you supply an expected proportion.
- Segment scores are inputs you provide; the tool enforces the gates and the weighting, it does not gather the underlying evidence.
- Competitive intelligence must follow the SCIP code of ethics — no misrepresentation, no protected information.

## Anti-patterns

- **A single TAM number with no method.** Always triangulate top-down against bottoms-up.
- **Spurious precision.** Size to the decision's tolerance; "$3.7142B" implies a confidence you do not have.
- **Powering only the total.** Each reported segment needs its own sample floor.
- **Leading or double-barreled survey questions.** Pre-test wording against the bias literature.
- **Calling a demographic slice a segment.** It must be substantial AND accessible.

## Distinct from

| Neighbor | Scope | Difference |
|---|---|---|
| `marketing-skill/campaign-analytics` | Attribution, ROAS, CPA, funnel of a live campaign | That **measures spend deployed**; this is **upstream methodology** |
| `marketing-skill/marketing-demand-acquisition` | Demand-gen, paid media, channel mix | That **runs acquisition**; this **builds the evidence** |
| `marketing-skill/marketing-strategy-pmm` | Positioning, GTM, category | That **sets strategy**; this **sizes and segments the market** |
| `commercial/pricing-strategist` | Pricing model + WTP + packaging | That **sets price**; this **sizes the market** |
| `product-research` (sibling) | User/product discovery methods | That studies **users**; this studies **the market** |

## Quick examples

```bash
python3 scripts/market_sizer.py --sample
python3 scripts/sample_size_planner.py --population 62000 --confidence 0.95 --moe 0.05
python3 scripts/segmentation_scorer.py --sample --output json
```

The sample market triangulates a ~$1.47B top-down SAM against the bottoms-up figure and flags the divergence; the segmentation sample drops the "solopreneurs who might want analytics" slice for failing the substantiality and accessibility gates.

## Forcing-question library (Matt Pocock grill discipline)

Walked one at a time by `/cs:grill-research-ops` or the orchestrator. Recommended answer + canon citation per question. Never bundled.

1. **"Is your TAM top-down or bottoms-up — and have you computed it both ways to triangulate?"**
   Recommended: both; reconcile the delta before quoting a number.
   Canon: Bessemer / a16z market-sizing; Fermi estimation.

2. **"What decision will this market size actually drive — and at what precision does it matter?"**
   Recommended: size to the decision's tolerance, not to a spurious-precision number.
   Canon: market-model conventions (Gartner/Forrester); decision-driven analysis.

3. **"What's your target margin of error and confidence — and does your sample clear it per segment, not just overall?"**
   Recommended: power each reported segment, not only the total.
   Canon: Cochran *Sampling Techniques*; AAPOR standards.

4. **"Are your survey questions free of leading and double-barreled wording?"**
   Recommended: pre-test the wording; cite the bias source.
   Canon: Schuman & Presser; Dillman *Tailored Design Method*.

5. **"Do your segments pass measurable / substantial / accessible / actionable — or are they just demographic slices?"**
   Recommended: drop segments that fail substantiality or accessibility.
   Canon: Kotler segmentation criteria.

Walk depth-first. Lock 1-2 before opening 3-5. After all are answered, invoke `market_sizer.py` → `sample_size_planner.py` → `segmentation_scorer.py`.

When to use

Plan TAM/SAM/SOM estimates, survey sampling and segment evaluation.

What you get

The complete original guidance with attributed source and declared limitations.

How it works

Clarify the task and evidence, then apply relevant source instructions within authorized scope.

Requirements

Market definition, dated sources, population assumptions and segment criteria.

Delivery and review notes

Brief source danger screening: full-text pattern triage and review of flagged passages, not a comprehensive audit or functional test. Sampling formulas require their assumptions; repeated anecdotes and finite-population formulas do not establish representativeness. Global/project config files are not created on load. Referenced scripts, templates, integrations and sibling skills are not supplied or installed unless explicitly listed as included. External calls, account changes, messages and file writes require the actual user task and authorization.

Starting prompt

Use Market Sizing Research Methods for [TASK]. Ask for missing inputs: Market definition, dated sources, population assumptions and segment criteria. Identify assumptions and missing tools before execution; do not claim results or approvals without evidence.

Not for

Claiming runtime installation, certified safety, verified numerical outputs or permission for external actions merely from loading this source.

What M11 added

German routing, task scope and source limitations. Original author attribution: claude-code-skills. Brief source danger screening: full-text pattern triage and review of flagged passages, not a comprehensive audit or functional test. Sampling formulas require their assumptions; repeated anecdotes and finite-population formulas do not establish representativeness. Global/project config files are not created on load. Referenced scripts, templates, integrations and sibling skills are not supplied or installed unless explicitly listed as included. External calls, account changes, messages and file writes require the actual user task and authorization.

Original authorship remains with alirezarezvani/claude-skills · Original source ↗

Original license & copyright

MIT License

Copyright (c) 2025 Alireza Rezvani

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Source SHA-256: 0e4037294f8e6bea1cb53de035eaa97bd2d74349d06f9b61d85f4420d7c084c9
Snapshot checked: 2026-09-28T15:50:31.645Z

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